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					Routable Road Centreline Network
Data Study




    REPORT & RECOMMENDATIONS

   1.0
   15 June 2006
    Routable Road Centreline Network Data
    Study

    REPORT & RECOMMENDATIONS
   1.0
   15 June 2006




    Sinclair Knight Merz
    ABN 37 001 024 095
    9th Floor, Durack Centre
    263 Adelaide Terrace
    PO Box H615
    Perth WA 6001 Australia

    Tel: +61 8 9268 4400
    Fax: +61 8 9268 4488
    Web: www.skmconsulting.com

    COPYRIGHT: The concepts and information contained in this document are the property of Sinclair
    Knight Merz Pty Ltd. Use or copying of this document in whole or in part without the written
    permission of Sinclair Knight Merz constitutes an infringement of copyright.
    LIMITATION: This report has been prepared on behalf of and for the exclusive use of Sinclair
    Knight Merz Pty Ltd’s Client, and is subject to and issued in connection with the provisions of the
    agreement between Sinclair Knight Merz and its Client. Sinclair Knight Merz accepts no liability or
    responsibility whatsoever for or in respect of any use of or reliance upon this report by any third
    party.
Routable Road Centreline Network Data Study




Contents
1.      Executive Summary                                               6
        1.1        Scope of this Document                               6
        1.2        WA’s Current Road Centreline Data                    6
        1.3        Business Drivers & Requirements                      6
        1.3.1      Proximity-Based Despatch                             7
        1.3.2      EM Planning & Preparedness                           8
        1.3.3      EM Recovery                                          8
        1.3.4      Route Planning, In-Vehicle Navigation & Tracking     8
        1.3.5      Route Analysis & Modelling                           9
        1.4        Data Requirements                                    9
        1.4.1      National Alignment                                 10
        1.4.2      Requirements for WA Government                     10
        1.5        Recommendations                                    11
        1.6        Risks                                              12

2.      Introduction                                                  14
        2.1        Project Background                                 14
        2.1.1      Current Road Centreline Data Initiatives           14
        2.2        Project Scope                                      15
        2.2.1      Following Stages                                   16
        2.3        Study Approach                                     16
        2.3.1      Phase 1 - Project Planning                         16
        2.3.2      Phase 2 – Assess Requirements                      16
        2.3.3      Phase 3 – Finalise Recommendations                 17
        2.4        Glossary of Terms & Abbreviations                  17

3.      Current Road Centreline Network                               18
        3.1        DLI Road Network Dataset                           18
        3.1.1      Data Quality                                       19
        3.1.2      Data Maintenance                                   19
        3.1.3      Data Elements                                      20
        3.2        DLI Streetsmart Dataset                            21
        3.3        MRWA Dataset                                       21
        3.3.1      Data Maintenance                                   22
        3.3.2      Data Elements                                      22
        3.4        Local Government Managed Roads                     24
        3.5        CALM Roads                                         24
        3.6        WA Police Dataset                                  25

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        3.6.1      Data Maintenance                                               25
        3.7        Property Street Address                                        25
        3.8        Current Datasets: Key Considerations for Development of a RRCN 26

4.      Key Drivers                                                              28
        4.1        Emergency Management Agencies                                  28
        4.2        Other Agencies                                                 29

5.      Key Business Requirements                                                30
        5.1        Proximity-Based Despatch                                       30
        5.1.1      Key Issues                                                     30
        5.1.2      Benefits                                                       31
        5.1.3      Additional EM Response Requirements                            31
        5.2        EM Planning & Preparedness                                     32
        5.2.1      Key Issues                                                     32
        5.2.2      Benefits                                                       32
        5.3        EM Recovery                                                    32
        5.3.1      Key Issues                                                     32
        5.3.2      Benefits                                                       32
        5.4        Route Planning, In-Vehicle Navigation & Tracking               33
        5.4.1      Key Issues                                                     33
        5.4.2      Benefits                                                       33
        5.5        Route Analysis & Modelling                                     33
        5.5.1      Key Issues                                                     34
        5.5.2      Benefits                                                       34

6.      Data Requirements for a RRCN                                             35
        6.1        Basic Elements for Routing                                     35
        6.2        National Requirements                                          35
        6.3        Fit for Purpose Requirements for WA                            37
        6.3.1      Data Elements to Meet EM Requirements                          37
        6.4        Additional Elements to Meet Government Requirements            38
        6.5        Sources of Fundamental Data Elements                           41
        6.5.1      Contacts                                                       41

7.      Recommendations                                                          42
        7.1        Recommendation 1                                               42
        7.2        Recommendation 2                                               42
        7.3        Recommendation 3                                               43
        7.4        Recommendation 4                                               43
        7.5        Recommendation 5                                               44


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        7.6        Risks                                                       45

Appendix A Study Participants                                                  47
        7.7        Workshop Participants                                       47
        7.8        Interviewees                                                48

Appendix B              Workshop Outcomes                                      49
        B.1        Rankings Used in This Section                               49
        B.2        Business Drivers                                            49
        B.3        Business Needs                                              51
        B.4        Dataset Requirements                                        55
        B.4.1      Broad Requirements (From Session 1 of the Workshop)          55
        B.4.2      Specific Elements                                            56
        B.5        Issues Noted                                                63
        B.6        Future Needs                                                63

Appendix C              DLI Road Network Metadata                              65

Appendix D              Inventory Collected by MRWA for State & Local Roads    69




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Index of Tables
       Table 1 Glossary of Terms & Abbreviations                                            17

       Table 2 Attributes of the DLI Road Centreline Network Dataset                        20

       Table 3 Inventory Collected for State Roads                                          22

       Table 4 Other Inventory Collected for State Roads                                    23

       Table 5 Inventory Collected for Local Roads                                          23

       Table 6 Preliminary List of Likely Elements for a National Road Centreline Framework 36

       Table 7 Key Business Requirements Identified for Agencies                            39

       Table 8 Potential Sources for the Four Fundamental Elements Identified for EM Use    41

       Table 9 Key Project Risks                                                            45




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Document history and status
 Revision          Date issued             Reviewed by       Approved by      Date approved   Revision type
 0.2               26 May 06               P Poole, S        JW               26 May 06       Pre-draft
                                           Taylor
 0.3               29 May 06               Client            JW               N/A             1st draft released for
                                                                                              comment
 0.4               2 June 06               Client            JW               12 June 06      2nd Draft released for review
 0.5               13 June 06              Client, JW        JW               13 June 06      Draft released for approval
 1.0               15 June 06              Client            Client           15 June 06      Project deliverable released
                                                                                              for approval




Distribution of copies
 Revision          Copy no                              Quantity             Issued to




 Printed:                            18 July 2011
 Last saved:                         18 July 2011 11:21 PM

 File name:                          D:\users\rrcn\RRCN Data Study 1.0.doc
 Author:                             James Wright
 Project manager:                    James Wright

 Name of organisation:               WALIS Office
 Name of project:                    Routable Road Centreline Network Data Study
 Name of document:                   RRCN Data Study

 Document version:                   1.0

 Project number:                     wv03110




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1.           Executive Summary
1.1          Scope of this Document
This document sets out the report and recommendations of a brief, targeted data study requested
by the Western Australian Land Information System Core Management Group (WALIS CMG). The
Study should provide a sufficient basis for consideration of development of a routable road
centreline network (RRCN) as a State government initiative.

The scope of the project was to: investigate the data requirements of a RRCN; identify additional
elements required to make DLI dataset routable as a fit for WA government purpose dataset; and
identify possible sources for required data. Note that this project is intended to be an initial step
only, and to provide a preliminary indication of whether the development and maintenance of the
dataset appears to be viable.


1.2          WA’s Current Road Centreline Data
Western Australia does not currently have a single, consolidated road centreline network. Instead,
various agencies maintain their own datasets in line with individual business requirements. There
are opportunities for improving the maintenance processes of the current datasets and addressing
some of the issues related to them as part of the development of a RRCN based on the DLI road
centreline network. These include:

     Leveraging the current maintenance processes for the DLI road centreline network by
      improving the engagement of key stakeholders (particularly Main Roads and local
      government);
     Opportunities to leverage the work undertaken by WA Police (WAPOL) in adding address
      information to DLI’s road centreline in the context of making these data available for wider
      government use;
     An opportunity to develop a RRCN for the metropolitan area initially (as data quality in this
      area is high) with a view to then covering off Emergency Services Directory areas in a
      following release (as the quality of the data in these areas is being improved);
     Opportunities for key agencies to work more closely together (notably Main Roads, CALM and
      DLI). There are also opportunities for FESA and the WAPOL to work closely in the
      maintenance of the address information added to the current road centreline by WAPOL;
     Opportunities for the shared maintenance of a RRCN as the DLI dataset is moved to DLI’s
      topographic environment and as further developments to the Shared Land Information
      Platform occur.

1.3          Business Drivers & Requirements
A stakeholder workshop was held to determine agencies business needs and key drivers for the
dataset.



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However, prior to the Data Study itself, the following key considerations for the development of a
WA government RRCN were identified:
     Potentially limited application of externally supplied datasets for WA Government purposes
      because of issues of data integration;
     Requirement for commercial supplier guarantee of data currency, accuracy and availability;
     Potential liability considerations for externally supplied datasets.


At the Workshop the following key drivers were identified for emergency management (EM)
agencies:

     Improve response times, and help save lives;
     Ensure the most efficient allocation of resources.



For other agencies:

     Support strategic land use and transport planning;
     Improve operational efficiencies;
     Mitigate any OHS risks associated with staff working in the field;
     Support community access to government information and self service.



At the workshop 26 business requirements for a RRCN were identified. These can be broadly
categorised as follows.


1.3.1        Proximity-Based Despatch
WAPOL and FESA have a requirement to allocate the nearest vehicle (a patrol vehicle or an
appliance) to an incident based on the shortest response time. This is the key business
requirement for these agencies and the key immediate requirement for use of the dataset to
support EM.

     Initial discussions with FESA and WAPOL indicate a strong benefit in using a RRCN to
      determine a recommended route.
      Recommended routes will need to be treated with extreme caution, however as errors in the
      data, or temporary changes to the network may significantly affect actual travel times
Key benefits are:

     The ability to leverage investments in an existing system (for WAPOL) and a new system
      (FESA);
     The ability for WAPOL and FESA to leverage investments in vehicle tracking devices (GPS
      units);

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     The potential to further reduce response times following the implementation of proximity-based
      despatch;
     Future potential to implement in-vehicle navigation systems. This will not be possible unless a
      RRCN is developed.



1.3.2        EM Planning & Preparedness
Agencies involved in EM have a need to plan potential routes to be used in the event of incidents;
plan the location of emergency infrastructure (eg fire and ambulance stations); and to plan potential
routes based on their suitability for fire appliances.

     A RRCN is likely to add value to this process by adding more ‘intelligence’ to potential routing
      scenarios.
     Additional information will be required for CALM and FESA to determine the suitability of
      routes for use by fire appliances.
Key benefits are:

     The ability to plan potential routes based on more comprehensive and reliable information;
     The ability to automate current processes.



1.3.3        EM Recovery
Following an incident there are requirements to use an RRCN for:

     Planning works as part of the recovery phase;
     Assessment of response performance following an incident.
To meet these requirements a RRCN is likely to require a number of data elements which would
extend the dataset significantly further than the basic elements required for routability.

Key benefits are:

     The ability to better plan and manage EM response;
     The ability to better assess response performance.



1.3.4        Route Planning, In-Vehicle Navigation & Tracking
There is an overall requirement for a RRCN by agencies which have staff or contractors working in
the field. The requirements for the dataset are to enable:

     Forward planning of a route;
     In-vehicle navigation during a route;


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     Tracking of vehicles in the field.
Key issues are:

     These requirements would require multi-agency access to a RRCN and a service to enable
      journey planning;
     Agencies do not currently use vehicles with in-car navigation systems (although this is likely to
      change in the future);
     There is the potential to develop a RRCN for use as content or an online service by private
      industry.
Key benefits are:

     The ability to leverage a RRCN for whole-of-government use with a focus on operational
      efficiencies and OHS.



1.3.5        Route Analysis & Modelling
There are requirements to use a RRCN to improve planning activities which rely on interpretation of
road centreline data. These include:

     Transport modelling analysis for postal rounds and line haul routes;
     Analysis of catchment areas for pedestrian access;
     Transport modelling for planning future road network demand and requirements.
Key issues are:

     For a dataset to be of use to Australia Post, a national network rather than a state-based
      RRCN would be required.
     To support local-scale transport modelling which takes into account pedestrian access, the
      dataset would need to incorporate DPI’s shared paths dataset and other related data.
Key benefits are:

     The ability to leverage a RRCN to support transport modelling for future road network demand;
     The potential to develop a RRCN in line with a national model which could ultimately be used
      as part of a national network.



1.4          Data Requirements
In order to route a vehicle to a given location there are three basic elements which are required to
determine a recommended route:

     Speed limit provides the information which a routing application needs to determine ‘travel
      cost’ (a comparison of the length of a road segment and the speed limit assigned to it);

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     Flow direction is a restriction related to the physical road network which is required by routing
      software to determine whether a road segment can be used as part of a route.
     Turning restrictions are restrictions related to the physical road network which are required
      to determine whether a vehicle can be routed from one segment to another.

1.4.1        National Alignment
The Intergovernmental Committee on Surveying and Mapping (ICSM) has set up a Roads Working
Group to look at the requirements for a national road network dataset. From a RRCN perspective it
follows that any routable elements added to a dataset to meet State requirements should be
considered in terms of their alignment to a national network. Preliminary work undertaken by the
Working Group indicates that there is likely to be alignment between national dataset requirements
and the basic three elements required for routing.


1.4.2        Requirements for WA Government
The fundamental requirements sought by WAPOL to enable the identification of recommended
routes are the three basic elements identified above. However, FESA have the additional need of
routing large and heavy vehicles on a daily basis. WAPOL also have a need to plan suitable routes
for escorted wide and/or long loads. This would require the following additional element:

     Vehicle height and weight restrictions.
If the dataset was to be extended further and include additional elements, the main additional
requirements for EM use would be those related to any temporary changes to the physical network.
These include the following:

     Temporary road closures;
     Temporary changes to turning restrictions or flow direction.
Note that information on road closures is faxed to FESA on a regular basis and could be
incorporated into a RRCN by FESA (and then shared with other users of the dataset).

For other agencies’ use of a RRCN:

     Preliminary analysis indicates that a RRCN developed to meet the fundamental requirements
      for EM would in fact meet the majority of requirements identified for other agencies.
     Whilst some business requirements would need additional fundamental elements these could
      be added at a later stage.
     There are also numerous additional elements which could be added (stakeholders identified a
      total of 57 at the workshop), however the list of those which would make a significant
      difference to agencies’ needs is by no means exhaustive.




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The following table lists the sources of the four fundamental elements:

Element                  Source                   Comments
Speed limit              MRWA                     MRWA has a statutory responsibility to allocate speed zones.
                                                  Preliminary discussions indicate a commitment from MRWA to
                                                  maintain these data.
Flow direction           Local                    A significant maintenance program would be required to source
                         government, DLI          changes from LGAs on an ongoing basis.
Turning                  Local                    As above
restrictions             government, DLI
Height & weight          MRWA                     This will require a relationship between data held on structures
restrictions                                      and the road centreline dataset.




1.5          Recommendations
1. Ensure that the development and maintenance of a RRCN will deliver tangible business
benefits which outweigh costs.

     Undertake a further, more detailed assessment to more closely define the requirements, costs
      and practicality of developing and maintaining the dataset;
     Explore potential business models for developing and maintaining the dataset in partnership
      with the private sector;
     Develop a rigorous business case which:
      –     Defines the costs of developing the dataset;
      –     Defines the maintenance costs (based on a formal and well-documented maintenance
            process);
      –     Confirms the business benefits to EM agencies;
      –     Confirms what can realistically be delivered by the dataset, as compared to expectations
            which agencies may have for its reliability (particularly for EM use);
      –     Defines realistic market opportunities for providing access to the dataset to the private
            sector, potential market value and revenue.



2. Carefully assess the maintenance implications prior to the development of the dataset.

     Define a practical and achievable maintenance process which ensures that the required
      elements are supplied by custodians on a regular basis;
     Ensure that there is a genuine commitment by custodians of the required elements which
      demonstrate business benefits to them;
     For local government develop a realistic maintenance process which considers a range of
      options (these could include goodwill, shared maintenance mechanisms, funding for
      maintenance or legislative change);

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     Assess the opportunities for shared maintenance of the dataset (for example between
      WAPOL, FESA, MRWA and DLI).



3. Improve the maintenance and quality of the existing datasets as part of the overall
initiative.

     Align the development of an improved data maintenance process (under ROCQI) with any
      RRCN initiative;
     Develop the RRCN as a holistic initiative which addresses potential quality improvements to
      the property street address dataset.



4. Develop the dataset in manageable stages.

     Develop the dataset to initially deliver only the 3 fundamental elements identified by this Data
      Study (or 4 including height and weight restrictions);
     Develop the dataset to initially cover the metropolitan area only, with a view to expanding
      coverage the Emergency Services Directory areas as a following release.



5. The dataset should be developed, where possible as part of a national framework.

     The ICSM should be kept closely informed of progress to help ensure alignment with a
      national RRCN;
     The dataset should be developed in line with a national framework using learnings from similar
      projects such as EuroRoadS.



1.6          Risks
The key risks identified for the project are:

     A RRCN used for developing recommended routes could direct a vehicle along a route which
      cannot be travelled. Mitigation strategies are:
      –     Focus on data maintenance to deliver maximum overall reliability.
      –     Gain input from users of the data in the maintenance process.
      –     Hold a forum to manage EM expectations of the dataset and specifically workshop this
            issue.
     Agencies may be unable to support the ongoing maintenance process and associated costs.
      Mitigation strategies are:



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      –     Ensure that stakeholders’ commitment to maintaining the dataset is based on tangible
            benefits to them, rather than goodwill.
      –     In the case of LGA’s develop a realistic maintenance process which considers a range of
            options (these could include goodwill, shared maintenance mechanisms, funding for
            maintenance or legislative change).
     For EM use drivers/navigators will develop an over-reliance on recommended routes.
      Mitigation strategies are:
      –     Work closely with FESA and WAPOL to determine how recommended routes would be
            handled and the impact of any unreliability on the overall benefits of a RRCN.
     Data updates may not be supplied by LGAs at the required frequency. Mitigation strategies
      are:
      –     Develop a realistic maintenance process which considers a range of options (these could
            include goodwill, shared maintenance mechanisms, funding for maintenance or legislative
            change).




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2.           Introduction
2.1          Project Background
             Note: This section has been taken from the Scope and Terms of Reference for
             Consultancy Services - Investigation of the Data Requirements for a Routable Road
             Centreline Network (RRCN) document produced by the WALIS Office as part of the
             original Request for Quotation for this project.

The existing Department of Land Information (DLI) digital road centreline network is not able,
without modification, to be used for purposes of in-vehicle navigation at the user level, nor for
vehicle dispatch and monitoring at the operational management control level.


2.1.1        Current Road Centreline Data Initiatives
     In Western Australia
      DLI has already established a digital road centreline dataset which details road and street
      names, private roads and road types. Under the ROCQI Project (ROad Centreline Quality
      Improvement) the digital road centreline dataset is being improved to bring it to a consistent
      data standard and to maintain the data to keep it current. The digital road centreline, managed
      through DLI, is not designed to be routable, however the datasets may be suitable for inclusion
      in a RRCN.

     Nationally
      The Inter-governmental Committee on Surveying and Mapping (ICSM) has formed a Roads
      Working Group (RWG) and WA is represented through DLI. The RWG is to determine the
      needs of establishing and maintaining a nationally consistent approach to capturing roads
      information that will allow derivation of a RRCN. A national data model is to be developed to
      set a base level requirement for the capture of features and attributes. Under this model
      individual agencies would continue to capture data to meet their information using existing
      frameworks, but they would also have the capacity to supply national data in a consistent
      manner.

     Internationally
      A number of jurisdictions internationally, particularly in North America and Europe, are
      documenting the requirements for, and implementing RRCN’s. As a consequence there is
      available documentation on the requirements of RRCN’s and data elements that have been
      identified to suit the requirements of each particular jurisdiction’s environment.

      ICSM RWG is examining the European EuroRoadS RRCN published technical data
      information. At this point in ICSMs deliberations it is understood the EuroRoadS RRCN is
      favoured as a suitable working model for deriving a RRCN for Australia.




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Existing RRCN-based Navigation Systems
Commercial in-vehicle navigation systems are already available, based on proprietary RRCN
datasets. However, commercial RRCN’s may potentially be of limited application for WA
Government purposes, particularly in an operational policing and emergency service environment.
Issues of data integration and commercial supplier guarantee of data currency, accuracy and
availability, and liability matters have been raised as being potential limitations of externally
supplied datasets. Despite these issues it is seen as being undesirable in the future to have key
WA Government services reliant on analogue spatial data sources (eg. street directories).


Background to the Consultancy
To implement a fit for WA Government purpose RRCN, the WALIS Core Management Group
(CMG) initiated a staged assessment of requirements on behalf of WALIS. The aim is to be able to
make a recommendation to WALIS on the potential or otherwise of implementation of a RRCN for
WA Government purposes, particularly for policing and emergency service applications.

The first stage of the assessment process is to investigate the data requirements of a RRCN
through a short-term consultancy managed through the WALIS office. The findings will be
presented by way of briefing sessions and a report and that is submitted to CMG for consideration
and their assessment of the way to progress the matter.

It is recognised that there is potential interest from the private sector in commercial applications of
a comprehensive, current and maintained RRCN dataset. Private sector interest has potential
implications if it is decided to move to implementation of a RRCN. However, this will not be
considered in-depth in this initial consultancy.


2.2          Project Scope
This document sets out the report and recommendations of a brief, targeted data study requested
by the Western Australian Land Information System Core Management Group (WALIS CMG). The
Study should provide a sufficient basis for consideration of the development of a routable road
centreline network (RRCN) as a State government initiative. This project is intended to be an initial
step only, and to provide a preliminary indication of whether the development and maintenance of
the dataset appears to be viable.

The project scope includes:

     Identifying required changes and/or elements for the DLI road centreline dataset to enable it to
      be routable;
     Identifying State government sources for the additional elements and the ability of these
      agencies to meet the supply, standards and maintenance requirements for the data;
     Identifying business needs and high-level drivers for the use of the dataset by key stakeholder
      agencies;




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     Identifying any significant technical issues or barriers to the setup and maintenance of the
      dataset using agency-supplied data.



2.2.1        Following Stages
Any future stages of the overall the project will be subject to endorsement by WALIS CMG, and
contingent upon the potential viability of the dataset (as defined by this project).

Future stages may include a study to define:

     More detailed requirements and specifications for the dataset;
     Costs associated with developing the dataset and its maintenance;
     A business model for the dataset, which could include an assessment of:
      –     maintenance options, including options for working with the private sector;
      –     market opportunities, such as an assessment of the worth of the dataset to potential
            private sector customers;
     An overall business case for development and maintenance of a RRCN.



2.3          Study Approach
A key focus of the approach adopted for the study was to be able to provide WALIS CMG with an
indication of the viability of a RRCN in a short (three week) time frame. To meet this objective an
approach was adopted which would enable key requirements and issues to be identified without in-
depth consultation into specific business or technical requirements. The approach included the
following three phases.


2.3.1        Phase 1 - Project Planning
The objectives of this phase were to document and agree on the scope of work, deliverables and
schedule for the project. A Scope of Work document was produced which clarified the scope,
approach and deliverables.


2.3.2        Phase 2 – Assess Requirements
The objectives of this phase were to:

     Identify the required changes to the DLI road centreline dataset to enable it to be routable.
     Identify known requirements for a routable dataset from EuroRoadS and the ICSM Working
      Group.
     Identify business needs and dataset requirements for key stakeholder agencies.




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This phase included:

     an analysis of the DLI dataset and related issues;
     initial consultation with emergency management (EM) agencies;
     a workshop for government agency stakeholders to identify requirements and potential data
      sources.
Details of the outcomes of the workshop are included in Appendix B.


2.3.3        Phase 3 – Finalise Recommendations
The objectives of this phase were to:

     Prepare recommendations on the potential viability of a RRCN dataset (this document);
     Finalise the report and communicate findings to key stakeholders.



2.4          Glossary of Terms & Abbreviations
The following terms and abbreviations have been used in this document.

     Table 1 Glossary of Terms & Abbreviations

Term/ Abbreviation              Description
CALM                            Department of Conservation and Land Management
DLI                             Department of Land Information
DoA                             Department of Agriculture
DoH                             Department of Health
DPI                             Department for Planning and Infrastructure
EM                              Emergency Management
FESA                            Fire and Emergency Services Authority
Geonoma                         The Geographic Names Register dataset maintained by DLI
GPS                             Global positioning systems
ICSM                            The Intergovernmental Committee on Surveying and Mapping
LGAs                            Local Government Authorities
MRWA                            Main Roads
OHS                             Occupational Health and Safety
PTA                             Public Transport Authority
RRCN                            Routable Road Centreline Network
SES                             State Emergency Service
WAPOL                           WA Police
WC                              Water Corporation




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3.           Current Road Centreline Network
Western Australia does not currently have a single, consolidated road centreline network. Instead,
various agencies maintain their own datasets in line with individual business requirements. Whilst
these datasets represent a high degree of duplication, they may differ in terms of the area of
coverage, categories of roads they include, attributes and actual geometry.

This section provides and overview of the principal road centreline datasets, with a focus on
identifying how the data are sourced and maintained. In creating a RRCN, the sourcing of data
elements and overall data maintenance will be critical issues. It is essential that any
recommendations developed for a RRCN are based on an agreed view of current data sources and
an understanding of the maintenance issues faced by agencies in working with existing elements.


3.1          DLI Road Network Dataset
In response to demand for a comprehensive state wide road centreline dataset DLI developed a
road network using data from a range of sources. The dataset brings together of a number of road
categories which are maintained separately by other agencies in accordance with their own
business needs. These categories include:

     Local roads. These are also covered by DLI’s street directory datasets and the Main Roads
      (MRWA) dataset;
     Private roads (also covered by DLI’s street directory datasets);
     Major roads and highways (also covered by the MRWA dataset);
     Roads on land managed by the Department of Conservation and Land Management (CALM).
      Note that these are also covered by the CALM dataset.



It should be noted that the DLI dataset does not form a simple amalgamation of data supplied by
CALM and MRWA. These datasets are processed by DLI to produce a dataset with certain
attributes removed and some changes to the actual geometry. For example, the DLI dataset
models roundabouts as a cartographic depiction of their actual layout, rather than the more
simplified depiction in the MRWA dataset. Similarly, the MRWA dataset depicts some road
segments as simplified geometry, rather than closely following the actual centreline position. This
reflects MRWA’s need to store straight-line distances, rather than depict actual position.

The business drivers for the development of the DLI dataset were:

     Demand for a consolidated state-wide dataset (largely from EM agencies) in line with DLI’s
      responsibilities as a land information management agency;
     The alignment between the sources of data required to maintain the dataset and DLI’s
      business activities, specifically:
      –     The legal and technical management of survey information for new subdivisions;

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      –     The allocation and coordination of geographic names (required for new and extended
            roads);
      –     The production of street directories for the metropolitan area, country towns and regional
            areas;
      –     Aerial photography capture, analysis, processing and mapping.



The DLI dataset is maintained under a memorandum of understanding with MRWA who are the
designated custodian.


3.1.1        Data Quality
The DLI road network dataset was originally compiled by merging the roads data from the
metropolitan street directory and the 1:25000, 1:50000 and 1:100000 datasets. Following migration
of the data from a CAD format to a GIS, several attribution issues existed in the data set which
were not resolved in regional areas. Positional issues also occurred since the data were not
updated to reflect the spatially upgraded cadastre.

In mid 2005 DLI initiated the Road Centreline Quality Improvement project (ROCQI) to resolve the
attribution issues and improve the positional accuracy of the dataset in regional areas. This project
(which is expected to run over three years) will lead to a dataset which better fits the cadastral
framework and better integrates with Geonoma.

DLI are using a range of sources to improve the reliability of the data, including:

     MRWA;
     CALM;
     The Public Transport Authority (PTA);
     Geographic names approvals; and
     Some input from Local Government Authorities (LGAs) via Streetsmart.
The ROCQI project is scheduled to finish in mid 2008 and will deliver a significant improvement
over the original dataset. The focus of work was initially in country towns and the south west, and
then extended to cover Emergency Service Directory areas.


3.1.2        Data Maintenance
A second component of the ROCQI project was to implement an improved, more systematic
approach to maintaining the dataset. A plan which defines this approach is under development.
This section outlines the current process, with reference to expected changes.

The current maintenance process is predominantly based on other business processes which
result in planned and actual changes to the road network. This enables DLI to update the road
network using information captured at-source. This includes the following:


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      The survey process for new subdivisions enables DLI to identify new roads prior to
       construction (the monitoring of actual construction is mostly determined from aerial
       photography);
      The geographic naming process enables DLI to identify both new roads and road extensions
       as they are allocated names. This process is likely to be extended to include coverage of
       roads on CALM land and private roads;
      Under agreement with the Department for Planning and Infrastructure (DPI), DLI is notified of
       road closures.
In addition to capturing information at-source, DLI also undertakes other investigation into potential
changes. This includes:

      Analysis of aerial photography for any network changes which have not been captured. DLI is
       considering using change detection software in the future to improve this process;
      Contacting LGAs to identify any changes which have occurred. This work is undertaken as
       part of the maintenance of the Streetsmart products and then fed into the road network
       dataset.
Note that under the current process there is no systematic notification of changes made to
MRWA’s dataset. These include changes to major roads undertaken by MRWA’s contractors and
to local roads (undertaken by LGAs). Under the (proposed) improved maintenance process DLI is
likely to look at a closer working relationship with MRWA which enables these changes to be
identified (DLI currently receive some notification from MRWA as road alignments change).


3.1.3        Data Elements
The dataset contains some key attributes applicable to routing, including a linkage to the official
road name stored separately in the Geographic Names Register (Geonoma) dataset. The attributes
are listed in the table below. The full metadata record is provided in Appendix C.

      Table 2 Attributes of the DLI Road Centreline Network Dataset

    Attribute                        Description/ Values
    Unique feature identifier        Enables features to be identified as part of the same road
    Geonoma identifier               A pointer to the official name for the feature which is stored in the
                                     Geographic Names Register database.
    MRWA_NUMBER                      Road Numbers supplied and supported by Main Roads
    MRWA_TYPE                        Main Roads WA sourced road classification type eg. H=Highways, L =Local
                                     Roads, M=Main Roads, N=None , R =Roundabout
    MRWA_HIERARCHY                   NA=Not Applicable
    Width                            < 6 = Under or equal 6 metres, > 6 = Over 6 metres, UN = Unknown
    Road classification              CL=Closed Road CN=Connector , HF=Highway/Freeway, MI=Minor
                                     Roads, MN=Main Roads, NA=Not Applicable, NH=National Highway,
                                     TR=Tracks, SU=Surveyed Unconstructed, UU=Unsurveyed Unconstructed
    Special purpose roads            Other than traffic purpose eg. AR=Access Road, BA=Bus Access,
                                     CL=Closed Road, CN=Connector, LA=Laneway, ML=Mall Access, NA=Not
                                     Applicable, OR=On/Off Ramp, RO=Roundabout., SU=Surveyed

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    Attribute                        Description/ Values
                                     Unconstructed, UU=Unsurveyed Uncontructed.
    Road owner type                  PU=Public, PR=Private. CL=Closed, RE=Restricted, CA=Calm Managed
                                     Access ,CN=Connector, SU=Surveyed Unconstructed, UU=Unsurveyed
                                     Uncontructed.
    Physical road surface            eg. SE=Sealed, US=Unsealed, CL=Closed Road, SU=Surveyed
                                     Unconstructed, UU=Unsurveyed Unconstructed, NA=Not Applicable, CN=
                                     Connector, NA=Not Applicable,
    Physical condition               eg. CL=Closed, OP=Operational, CN=Connector, SC=Captured from Final
                                     Survey Certificate, CM=Calm Managed Access, SU=Surveyed
                                     Unconstructed, UU=Unsurveyed Unconstructed , CD=Calm Managed
                                     Disease Risk
    Connector type                   TT=Trafficable, NT=Non Trafficable




3.2          DLI Streetsmart Dataset
DLI’s Streetsmart products include roads in the metropolitan area, country towns and regional
areas. These data form an important input for the road network dataset.

The data are maintained from the following sources.

      Local government authorities.
       LGAs are a source of updates for the dataset. Updates are requested annually on changes to
       the road network and points of interest, however the level of commitment to providing updates
       to DLI varies between LGAs.

      Main Roads.
       Data are supplied by MRWA on new roads following construction. Note that this information
       includes turning restrictions.




3.3          MRWA Dataset
The MRWA road centreline dataset has been developed and maintained to meet the agency’s
specific business requirements. Whilst the dataset includes a range of road categories (from
highways to local roads), its focus is on:

      Those roads which qualify for funding under the Commonwealth Grants Commission. These
       are predominantly only major roads in regional and urban areas.
      The management of information in accordance with MRWA’s responsibility to manage these
       assets. This requires MRWA to know the location of roads and straight-line distances along
       segments, but does not require the road centreline to be mapped with the same degree of
       accuracy as DLI’s street directories.


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Note that the MRWA dataset does not include any private roads (and consequently does not
include some roads where there are physical addresses).


3.3.1        Data Maintenance
The dataset is maintained to meet MRWA’s requirements, which include:

     The capture of any changes to State roads at-source by MRWA’s contractors who supply
      updates as changes occur;
     The supply of changes to local government-managed roads by LGAs. (this is outlined under
      3.4 Local Government).



3.3.2        Data Elements
A range of data elements are maintained for the MRWA road centreline in the Integrated Road
Information System (IRIS). This information is grouped into inventory types and then overall
inventory groups (listed below), with a range of individual attributes for each inventory type. Details
of these attributes are provided in Appendix D.

     Table 3 Inventory Collected for State Roads

No. Inventory Group              Inventory Type                   No. Inventory Group      Inventory Type
A      Drainage                  Culvert (Large & Small)          H   Railway Crossing &   Railway Crossing
                                                                      Line
                                 Floodway                                                  Railway Line
                                 Drainage Outfall
                                 Drainage Section
B      Traffic Facilities        Longitudinal Road Line           I   Administration       Adjacent Material
                                 Sign                                                      Commonwealth Class
                                 Sign Panel                                                Control of Access
                                 Kerbing                                                   State Electoral Districts
                                 Median                                                    Federal Electorates
                                 Safety Barrier                                            State Electoral Regions
                                 Pedestrian Crossing                                       Function Class
                                 Focal Point Marker                                        Local Government
                                                                                           Boundary
C      Roadside Facilities       Roadside Stopping Place                                   Regional Boundary
                                 Arrester Bed                                              Responsibility Area
D      Geometry                  Horizontal Alignment                                      Road Closure
                                 Vertical Alignment                                        Legal Speed Limit
E      Pavement                  Original Traffic Pavement
                                 Pavement Widening


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No. Inventory Group              Inventory Type                   No. Inventory Group   Inventory Type
                                 Shoulder Pavement
                                 Pavement Repair
                                 Geotextile
F      Surfacing                 Lane Surface
                                 Shoulder Surface
G      Environment               General Terrain
                                 Grid
                                 Material Site
                                 Obstruction
                                 Other Inventory
                                 Vegetation Rating
                                 Wall
                                 Water Bore



     Table 4 Other Inventory Collected for State Roads

No. Inventory Group              Inventory Type                   No. Inventory Group   Inventory Type
K      Electrical Services       Traffic Signals                  L   Structures        Timber Bridge
                                 Emergency Phone                                        Major Culvert
                                 Incident Detection Device                              Reinforced Concrete
                                                                                        Bridge
                                 Monitoring Camera                                      Steel Bridge
                                 SCATS Cabin                                            Prestressed Concrete
                                                                                        Bridge
                                 Variable Message Sign                                  Steel/Concrete
                                                                                        Composite Bridge
                                 Roadway Lighting                                       Sign Gantry
                                                                                        Timber Hybrid Bridge
                                                                                        Tunnel



     Table 5 Inventory Collected for Local Roads

No. Inventory Group              Inventory Type                   No. Inventory Group   Inventory Type
B      Traffic Facilities        Longitudinal Road Line           I   Administration    Adjacent Material
                                 Sign                                                   Commonwealth Class
                                 Sign Panel                                             Control of Access
                                 Kerbing                                                State Electoral Districts
                                 Median                                                 Federal Electorates
                                 Safety Barrier                                         State Electoral Regions
                                 Pedestrian Crossing                                    Function Class
                                 Focal Point Marker                                     Local Government
                                                                                        Boundary

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No. Inventory Group              Inventory Type                   No. Inventory Group   Inventory Type
8      Electrical Services       Traffic Signals                                        Regional Boundary
                                 Emergency Phone                                        Responsibility Area
                                 Incident Detection Device                              Road Closure
                                 Monitoring Camera                                      Legal Speed Limit
                                 SCATS Cabin                      J   RoMan Inventory   Local Inventory
                                 Variable Message Sign                                  Local Path Summary
                                 Roadway Lighting                                       LG Grants Commission




3.4          Local Government Managed Roads
LGAs manage local roads within their own jurisdiction and are a key source of information about
changes made to these roads. The information on local roads within the MRWA dataset is supplied
by LGAs as part of MRWA’s role to coordinate funding under the Commonwealth Grants
Commission. Note that as funding is allocated annually, there is no business need for either local
government or MRWA to update their data more frequently. Some LGAs, notably in regional areas
may supply data to MRWA less frequently (for example every few years).

Actual changes to the roads managed by local government will occur throughout the year in
accordance with each LGA’s capital works program. Note that these changes will include works
which are not captured within the MRWA dataset, but which are significant in terms of network
routing. These include works related to:

     Physical turning restrictions (such as median strips);
     Imposed turning restrictions (at intersections or affecting U-turns);
     Changes to flow direction;
     Traffic calming devices.
Local government is also an important source of information in relation to temporary changes to the
network such as diversions and temporary closures.


3.5          CALM Roads
CALM have a duty of care to users of roads on CALM land. In response to this need CALM have
initiated a 3 year project to re-capture road information on CALM estate. This constitutes an
extensive road network ranging from sealed roads in National Parks to strategic four wheel drive-
only tracks.

The project includes:

     The capturing of roads using global positioning systems (GPS) to improve positional accuracy;
     The capture of attributes for these roads with a focus on the identification of risks and hazards.
      Attributes range from basic information (such as road width and surface) to more detailed
      attributes captured according to the RoMan data structure.

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This project has the potential to supply a dataset with a high degree of positional accuracy as a
component of a RRCN. The CALM dataset includes information on safe travel speed (likely to be
required for routability). It does not include details of turning restrictions or flow direction, however
there are very limited instances where these apply and could be readily added at a later date.


3.6          WA Police Dataset
The WA Police (WAPOL) have a strong business need for a road centreline dataset in order to
support the despatch of police vehicles. To meet this need WAPOL require a dataset which
includes street addresses and which is highly reliable, both in terms of correct addressing and its
physical network.

The WAPOL dataset is a copy of the DLI road network with address ranges added as attributes for
each segment.


3.6.1        Data Maintenance
WAPOL acquire an incremental update of the road centreline and property street address datasets
from DLI quarterly, and invest significant effort processing the data to fit the required model for the
despatch system (CADCOM) and checking for errors both introduced by this process and in the
network itself.

A key component of the maintenance of this dataset is the work undertaken by WAPOL to identify
errors and report these back to DLI. This includes searching for errors in the updated dataset prior
to release for use in CADCOM and the reporting of any errors identified by patrol vehicles.

Errors are consistently identified with the dataset and can include:

     Addresses which are missing from the dataset;
     Incorrect road names;
     Road names missing from the dataset (for existing and new roads);
     Existing roads which are incorrectly tagged as proposed;
     Road segments which are missing from the dataset.



3.7          Property Street Address
Note that addresses are not generally considered to be part of a road centreline dataset. However,
from a business perspective addresses are a key component of the dataset for routing vehicles to a
specific location. DLI’s Property Street Address dataset stores addresses against the cadastre, not
road segments.

For WAPOL, the need to load addresses to the road centreline data is a significant issue as
CADCOM requires each segment to be attributed with the address range on each side of the street
in order to identify the location of an incident.

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For the Fire and Emergency Services Authority (FESA), a similar issue will apply. FESA is currently
developing an in-house routing application for their despatch system (based on ESRI’s ArcSDE
product). Whilst FESA will be able to develop the routing application with less rigorous rules to
CADCOM, the system will still use address ranges as attributes of each segment.

Once FESA deploy the new system (and assuming that a routable dataset is available) there will
be an opportunity for them to work with WAPOL in adding address ranges as attributes to a RRCN.
                                                                        1
Note that some issues of data quality have been raised during this study and warrant further
investigation as part of any following project.




3.8          Current Datasets: Key Considerations for Development of a RRCN
From a routing perspective the key considerations in relation to current datasets are as follows.

     The DLI dataset forms the most comprehensive ‘base’ dataset for developing a RRCN. This
      dataset is not, however a simple amalgamation of other agencies’ data and does not meet
      some of the specific requirements of other agencies. Whilst this dataset does not constitute a
      fit for government purpose road centreline in its current form, it is the closest dataset to an
      authoritative statewide road centreline.
     The development of a RRCN based on the DLI road centreline dataset provides opportunities
      for leveraging the current maintenance processes and improving the engagement of key
      stakeholders such as MRWA and local government;
     Agencies using a RRCN for routing are likely to require address ranges to be added to the
      dataset. Whilst this need is being met by value-adding work undertaken by WAPOL, the
      availability (and suitability) of WAPOL’ dataset will need to be considered if a RRCN is to be
      developed for wider government use.
     Whilst data quality improvements under ROCQI are still in progress, the outstanding work is in
      regional areas only and is currently being undertaken for the Emergency Services Directory
      areas. This provides an opportunity to develop a RRCN for the metropolitan area, with later
      extensions to the Emergency Services Directory areas as the ROCQI project progresses.
     There is an increasing level of duplication between the data maintained by MRWA and CALM
      and the data maintained by DLI. Whilst the new maintenance processes under ROCQI have
      not yet been finalised, these are likely to focus on a closer working relationship between these
      agencies which could incorporate:
      –     Regular updates being provided by MRWA;
      –     Amalgamation of the revised CALM dataset with the DLI road network.
      This would, in effect move the DLI dataset closer towards becoming a fit for government
      purpose road centreline.


1
    Email response from DPI following a review of workshop outcomes.
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     Note that there are opportunities for shared maintenance of the dataset as DLI moves the data
      from the existing system (GREAT) to the GIS topographic environment. The implementation
      and further development of the Shared Land Information Platform (SLIP) is also likely to
      enhance the ability of agencies to share the maintenance of multi-agency datasets. This is
      significant, as the addition of elements for routing is likely to require data to be sourced, and
      possibly maintained by multiple agencies on an almost real-time basis.
     In relation to local government managed roads the key issues are:
      –     The currency of the data (updates are not supplied to MRWA as they occur);
      –     There is variation in both the frequency and reliability of the data supplied to MRWA (both
            across LGAs and within each LGA as staff changes occur);
      –     The Roman system used by LGAs to supply data to MRWA does not capture some of the
            key attributes required for routing (notably turning restrictions and flow direction).
      These issues will need serious consideration if a RRCN is to be developed, since local
      government are likely to be a key component of an enhanced data maintenance strategy.

     The work invested in identifying and reporting errors by WAPOL is indicative of the issues
      other EM agencies would face in using the DLI road network. This points to a gap between the
      actual accuracy of the dataset and that required for EM use. There is however, an opportunity
      to leverage the additional use of the dataset by EM agencies (and others) as a source of
      regular error reporting to improve the overall reliability of the dataset.
     There are also opportunities for FESA and WAPOL to work closely in the maintenance of the
      address information added to the current road centreline by WAPOL.




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4.           Key Drivers
The stakeholder workshop identified a number of business drivers which underpin agencies’
requirements for a RRCN. These are listed in Appendix B.

In determining the viability of a RRCN it is important to identify those drivers which are sufficiently
critical to support the likely investment in developing and maintaining the dataset. This Study was
largely initiated as a result of needs expressed by EM agencies, with supporting needs expressed
by other agencies. The findings of the workshop support this view, specifically:

     There are strong drivers for a RRCN for use by EM agencies which view the dataset as being
      a critical component of their response operations;
     The key drivers for development of a RRCN dataset for and by WA Government were
      identified as being:
      –     Potentially limited application of externally supplied datasets for WA Government
            purposes because of issues of data integration;
      –     Requirement for commercial supplier guarantee of data currency, accuracy and
            availability;
      –     Potential liability considerations for externally supplied datasets.
     Other agencies expressed needs for the dataset, but these were largely as a support
      mechanism to non-critical activities. An exception to this is the ability to reduce occupational
      health and safety (OHS) risks associated with staff working in the field.
This section outlines the key drivers for the dataset as a summary of the workshop findings and
interviews with agency stakeholders. Note that specific business requirements are outlined in the
following section.


4.1          Emergency Management Agencies
‘Improve response times, and help save lives’

The single, overarching driver for EM agencies in the use of a RRCN is the need to reduce incident
response times in order to improve public safety, reduce damage to property and potentially save
lives. WAPOL are under increasing pressure to improve response times and report on actual
response times, which currently average between 9-10 minutes. For some incidents an improved
response by a matter of minutes can literally mean the difference between life and death. FESA
have similar needs to improve response times through allocating the appliance which can reach an
incident in the shortest time.

‘Ensure the most efficient allocation of resources’

This driver is closely tied to the need to improve response times, since a more efficient allocation of
vehicles to an incident is likely to improve response times and the efficiency of the response.


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4.2          Other Agencies
‘Support strategic land use and transport planning’

For DPI, a key driver for a RRCN is the ability to leverage this dataset in support of strategic
planning for future land use and transport. The dataset is likely to provide improved data quality
and reliability, in addition to the routing functionality which could enhance transport modelling
calibration. It is also likely to be a key element in many Intelligent Transport Systems initiatives of
improving the efficiency and capacity of the existing and future transport networks.

‘Improve operational efficiencies’

This broad driver underpins many agencies’ view that a RRCN will ultimately assist in the allocation
of staff undertaking work in the field (through routing and allocating resources to the nearest job).
The need to improve efficiency in allocating field staff is particularly relevant to agencies
undertaking asset maintenance work (such as utilities and local government) and site visits (such
as DLI’s valuers and surveyors).

‘Mitigate any OHS risks associated with staff working in the field’

Closely aligned to the use of a RRCN for allocating resources is the need to monitor the location of
field staff and recommend safe routes in hazardous areas. This is underpinned by agencies’
requirement to mitigate any OHS risks, which can be more significant for staff operating in remote
areas and areas affected by hazards (such as CALM staff working in an area at risk from wildfire).

‘Support community access to government information and self service’

The use of a RRCN for routing by private industry and the community is in line with government
initiatives to improve access to government information via customer self-service. Whilst this Study
is restricted to considering only government needs for a RRCN, there is a clear recognition by
agencies that there are community demands for the dataset, and community benefits in the
availability of an authoritative and reliable dataset based on government data.




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5.           Key Business Requirements
This section outlines the key business requirements for a RRCN based on the drivers described in
the previous section. Note that this is not a full list of the requirements captured at the stakeholder
workshop, but a summarised view aimed at identifying those requirements which are critical to
agencies, and those which represent a longer-term or supporting need.

As the scope of this Study was intended to look at high-level requirements only, these needs have
not been assessed in detail with individual agencies.


5.1          Proximity-Based Despatch
WAPOL and FESA have a requirement to allocate the nearest vehicle (a patrol vehicle or an
appliance) to an incident based on the shortest response time. This is the key business
requirement for these agencies and the key immediate requirement for use of the dataset to
support EM.

In late 2006, WAPOL will start to deploy GPS units in their vehicles. This represents a significant
step in ensuring response times are minimised as it will allow the nearest vehicle to be allocated to
an incident based on precise knowledge of each vehicle’s location. Currently, WAPOL allocate
vehicles which are in a given district, but these may not be the closest to an incident (there are 7
districts in the metropolitan area with around 20-30 vehicles allocated to each).

WAPOL recognise that with GPS units fitted, the despatch operator will need to determine which is
the closest vehicle based on the shortest travel time to the incident. The requirement for a RRCN is
to allow the CADCOM system (which supports routing) to determine a recommended route. Note
that WAPOL accept that the recommended route will need to be regarded as a recommendation
only, and that drivers (and navigators) will need to apply their own knowledge to assess whether
the recommended route does in fact represent the shortest travel time.

FESA currently have GPS units in their appliances and are developing a despatch system. The
business requirement for FESA is much the same as for WAPOL, however FESA may also (in the
future) use the system to recommend routes to assist crews operating outside of their local area
(where these crews lack local knowledge). Whilst a RRCN would provide added benefits to these
crews, there is also additional risk, as crews may place an over-reliance on the recommended
route.


5.1.1        Key Issues
     Initial discussions with FESA and WAPOL indicate a strong benefit in using a RRCN to
      determine a recommended route. Actual benefits will need to be assessed against the cost of
      data maintenance and capture and may become clearer once WAPOL have deployed GPS
      units in their vehicles. This move will enable both FESA and WAPOL to assess the immediate
      benefit of proximity-based routing, and the potential additional benefit of automating this via a
      RRCN.

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     There is significant risk in using a RRCN to determine a recommended route, since to be
      effective, the recommended route should be ‘smarter’ than a route determined by a navigator
      using a street directory. Recommended routes will need to be treated with extreme caution
      however, as errors in the data, or temporary changes to the network, may significantly affect
      actual travel times. For example, an error in the dataset in relation to turning restrictions on a
      major road may result in a vehicle missing a crucial turning and an increased response time.
      Similarly, a system using a RRCN which lists the Kwinana Freeway as a 100km/h speed limit
      may route a vehicle along the freeway during rush hour traffic, when following minor roads
      would in fact be quicker.


Initial indications from FESA and WAPOL are that a RRCN with limited attributes would still be
acceptable, and that these limitations would be managed (this is discussed further in Section 6.3
Fit for Purpose Requirements for WA).



5.1.2        Benefits
     The ability to leverage investments in an existing system (for WAPOL) and to support a new
      system (FESA);
     The ability for WAPOL and FESA to leverage investments in vehicle tracking devices (GPS
      units);
     The potential to further reduce response times following the implementation of proximity-based
      despatch;
     Future potential to implement in-vehicle navigation systems. This will not be possible unless a
      RRCN is developed.



5.1.3        Additional EM Response Requirements
The following requirements were also identified in relation to EM response:

     Emergency management response planning and modelling.
      This is discussed in the following section.

     Re-routing and traffic management (following incidents).
      There is a requirement to re-route traffic following incidents. This would, however require real-
      time data.

     Deployment of medical teams (without sirens).
      The Department of Health (DoH) also have a requirement to determine recommended routes
      when attending incidents (notably by the Urban Search and Rescue Disaster Medical
      Assistance Team). This would require access to the data by DoH and use of a despatch
      system.

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5.2          EM Planning & Preparedness
Agencies involved in EM have a need to plan potential routes to be used in the event of incidents
(such as incidents at special risk sites, or incidents involving critical infrastructure). For FESA, a
key need is to be able to plan the location of fire stations based on travel times from potential sites.
For both CALM and FESA, it is important to be able to plan potential routes based on their
suitability for fire appliances.


5.2.1        Key Issues
     A RRCN is likely to add value to this process by adding more ‘intelligence’ to potential routing
      scenarios. This work is currently undertaken using manual processes.
     Additional information will be required for CALM and FESA to determine the suitability of
      routes for use by fire appliances.

5.2.2        Benefits
     The ability to plan potential routes based on more comprehensive and reliable information.
     The ability to automate current processes.



5.3          EM Recovery
Following an incident there are requirements to use an RRCN for the following.

     Planning works.
      A RRCN could be used to assist in routing vehicles as part of the recovery phase. The dataset
      would provide additional benefits if information was available on:

      –     routes suitable for heavy, wide and high loads;
      –     the location of services (such as hydrants, or for Water Corporation contractors to access
            sewer drains).
     Assessment of response performance following an incident.
      A RRCN could be used to assess whether the best routing was actually used to respond to an
      incident, recognising that the recommended route may not have been the ideal route for the
      day and time of travel.


5.3.1        Key Issues
     To provide real benefits which meet these requirements, a RRCN would require a number of
      data elements which would extend the dataset significantly further than the basic elements
      required for routability.

5.3.2        Benefits
     The ability to better plan and manage EM response.
     The ability to better assess response performance.


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5.4          Route Planning, In-Vehicle Navigation & Tracking
There is an overall requirement for a RRCN by agencies which have staff or contractors working in
the field. The requirements for the dataset are to enable:

     Forward planning of a route.
      This requirement is to support a more efficient allocation of resources where staff are attending
      multiple addresses, or contractors are undertaking an asset maintenance program. For the
      Public Transport Authority (PTA) there is a need to support journey planning by the public;

     In-vehicle navigation during a route.
      There is a strong requirement by agencies to mitigate any OHS risks by enabling staff to
      navigate in remote or hazardous areas.

     Tracking of vehicles in the field.
      This requirement is to support OHS and for overall fleet management.


5.4.1        Key Issues
     These requirements would require multi-agency access to a RRCN and a service to enable
      journey planning.
     Agencies do not currently use vehicles with in-car navigation systems. Whilst this is likely to
      change in the future, the requirement to enable navigation in remote or hazardous areas would
      require additional accurate data statewide and information on hazards (such as wildfire or
      flooding). If this is not available through the RRCN in near real-time, then users, as part of risk
      mitigation, will need to be aware of their responsibility to access this type of information
      through local sources.
     Whilst agencies do not generally use vehicle tracking systems, there is the potential to develop
      a RRCN for use as content or an online service by private industry. Agencies may be able to
      leverage the data or service for their own use if required.

5.4.2        Benefits
     The ability to leverage a RRCN for whole-of-government use with a focus on operational
      efficiencies and OHS.



5.5          Route Analysis & Modelling
There are requirements to use a RRCN to improve planning activities which rely on interpretation of
road centreline data. These include:

     Transport modelling analysis for postal rounds and line haul routes.
      This is a requirement to support Australia Post’s (AP) National Heavy Fleet.

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     Analysis of catchment areas for pedestrian access.
      DPI have a requirement to support planning which takes into account pedestrian access.

     Transport modelling for planning future road network demand and requirements.
      DPI also have a requirement to support the planning of future roads in accordance with
      population and land use changes.


5.5.1        Key Issues
     For a dataset to be of use to AP, a national network rather than a state-based RRCN would be
      required.
     To support local-scale transport modelling which takes into account pedestrian access, the
      dataset would need to incorporate DPI’s shared paths dataset and other related data. This
      would ultimately benefit other agencies (such as FESA) as it would enable additional
      (pedestrian) access routes to be identified in both planning and responding to incidents. The
      inclusion of pedestrian access data is likely to significantly increase the scope of a RRCN and
      add significant complexity to the maintenance process.

5.5.2        Benefits
     The ability to leverage a RRCN to support transport modelling for future road network demand.
     The potential to develop a RRCN in line with a national model which could ultimately be used
      as part of a national network (this is also likely to be required by transport and logistics
      companies).
     The opportunity for AP to provide feedback on any issues with data quality.




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6.           Data Requirements for a RRCN
This section identifies a number of key considerations in defining the data elements which will be
required to support the use of a RRCN for government purposes. These include alignment to a
national model, the basic elements required for routing applications and elements which will be
required to support both immediate and longer term business needs.


6.1          Basic Elements for Routing
In order to route a vehicle to a given location there are three basic elements which are required to
determine a recommended route. These relate to both restrictions in the physical network and
restrictions on travel time as follows:

     Speed limit provides the information which a routing application needs to determine ‘travel
      cost’. This is essentially a comparison of the length of a road segment and the speed limit
      assigned to it.
     Flow direction is a restriction related to the physical road network which is required by routing
      software to determine whether a road segment can be used as part of a route. Flow direction
      information could include 2-way traffic (no restriction), one-way traffic in a given direction and
      no traffic allowed (such as pedestrian mall).
     Turning restrictions are restrictions related to the physical road network which are required
      to determine whether a vehicle can be routed from one segment to another. This relates to
      physical restrictions (such as elevated roads which cross an underpass, or barriers such as
      median strips) and imposed restrictions (such as traffic lights with a ‘no right turn’).



6.2          National Requirements
The Intergovernmental Committee on Surveying and Mapping (ICSM) has set up a Roads Working
Group to look at the requirements for a national road network dataset. The Working Group
comprises representatives from each state and territory, key commonwealth agencies and Land
Information New Zealand. This initiative follows a major project undertaken in Europe (EuroRoadS)
which is developing a pan-European road data infrastructure. The EuroRoadS project started in
                                                                     2
early 2004 and will conclude in late 2006, with the aim of delivering :

     A framework of specifications describing an information model, core data content, as well as
      an exchange model and exchange format for European road data;
     A model for handling evaluation and quality control of road data in the information chain (from
      data producers to end users);
     A metadata catalogue;



2
    EuroRoadS – A pan-European Road Data Solution (www.euroroads.org)
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     A terminology catalogue;
     Results from practical demonstrations verifying the effectiveness of the framework and its
      functionality.
Whilst the ICSM Working Group is in the early stages of its work, it seems likely that the framework
will closely follow the European model. From a RRCN perspective it follows that any routable
elements added to a dataset to meet State requirements should be considered in terms of their
alignment to a national network. Preliminary work undertaken by the Working Group indicates that
there is likely to be alignment between national dataset requirements and the elements required for
routing. A preliminary list of likely elements is shown below. Note that this is a preliminary list
developed at an early meeting of the Working Group and should only be treated as an early draft.

     Table 6 Preliminary List of Likely Elements for a National Road Centreline Framework

Draft Element                                       Relevance to a RRCN
Highway number                                      -
Road elevation                                      -
Speed limit                                         A key element for routability
Fixed speed camera locations                        -
Accident zone hotspots                              -
Heavy vehicle traps/ramps                           -
Rest area locations                                 -
Emergency phones                                    -
Emergency landing strips                            -
Vehicle weight and height limits                    This is likely to be an additional requirement for more sophisticated
                                                    routing, but not a fundamental element.
Heavy vehicle checking stations                     -
Turning restrictions                                A key element for routability
Flow direction                                      A key element for routability



Significantly, the above list identifies the three elements which can be viewed as the most basic
elements for routing: speed limit, turning restrictions and flow direction (these are discussed in the
following section). It also identifies one additional element (vehicle height and weight restrictions)
which is important for routing larger vehicles (such as fire appliances). Whilst this is a preliminary
list only, the initial work undertaken by the Working Group indicates that a RRCN developed for
WA, which initially included only the basic elements for routing would align with a national network
model.




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6.3          Fit for Purpose Requirements for WA
6.3.1        Data Elements to Meet EM Requirements
Fundamental Requirements
The fundamental requirements sought by WAPOL to enable the identification of recommended
routes using CADCOM are the three basic elements identified above:

     Speed limit;
     Flow direction;
     Turning restrictions.
For FESA these are also regarded as the fundamental requirements, however FESA have the
additional need of routing large and heavy vehicles. This would require the following additional
element:

     Height and weight restrictions which would affect fire appliances (based on the largest
      appliances) and wide and long load vehicle routing.
Restrictions affecting wide and long loads would be useful to WAPOL to assist the work of the
Vehicle Escort Unit which determines the routes for, and accompanies these vehicles. WAPOL
would also need to identify any turning restrictions related to a vehicle’s turning diameter in addition
to physical barriers.

Initial discussions with FESA are that the three basic elements would be acceptable as a valuable
initial step, however FESA’s and WAPOL’s preference would be to include height and weight
restrictions in a first release of a RRCN.


Additional Requirements
If the dataset was to be extended further and include additional elements, the main additional
requirements for EM use would be those related to any temporary changes to the physical network.
These include the following:

     Temporary road closures;
     Temporary changes to turning restrictions or flow direction.
Note that information on road closures is faxed to FESA on a regular basis, and that both the new
FESA system and CADCOM have the ability to identify road segments which are temporarily
closed. These systems do not appear to support the ability to define temporary changes to flow
direction or turning restrictions.

In addition, FESA’s requirements would also benefit from knowledge of the location of traffic
calming devices, however this is regarded as a less significant requirement.




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6.4          Additional Elements to Meet Government Requirements
Fundamental & Additional Requirements
The following table (overleaf) provides a summary of the key business requirements identified for
agencies and consideration of:

     any fundamental elements these would require (in addition to the 4 fundamental elements
      identified for EM;
     any additional elements which are likely to provide a significant benefit.
Note that this is a preliminary assessment based on the stakeholder workshop only, rather than
any in-depth analysis with individual agencies.

Key observations are as follows:

     This preliminary analysis indicates that a RRCN developed to meet the fundamental
      requirements for EM would in fact meet the majority of requirements identified for other
      agencies.
     Whilst some business requirements would need additional fundamental elements these could
      be added at a later stage.
     There are also numerous additional elements which could be added (stakeholders identified a
      total of 57 at the workshop), however the list of those which would make a significant
      difference to agencies’ needs is by no means exhaustive.




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              Table 7 Key Business Requirements Identified for Agencies

Business Requirement                                  Fundamental Elements in addition to the 4           Comments                                    Additional Significant Elements
                                                      fundamental elements identified for EM
Additional EM Response Business Requirements
Response planning and modelling                       None                                                                                            Chicanes and other traffic calming
                                                                                                                                                      devices
                                                                                                                                                      Traffic volume.
                                                                                                                                                      Note: data on traffic conditions is likely to
                                                                                                                                                      benefit all uses of the dataset.
Re-routing and traffic management                     None                                                This will require the ability to make       Location of incidents (real-time)
(following incidents).                                                                                    temporary changes to the network.
                                                                                                          WAPOL and FESA’s applications are likely
                                                                                                          to support temporary road closures only.
Deployment of medical teams (without                  None                                                This will require DoH to have access to a
sirens).                                                                                                  routing application.


EM Planning & preparedness                            None
EM Recovery
Planning works                                        Location of critical infrastructure (eg hydrants,
                                                      drains)
Assessment of response performance                    None
following an incident
Route Planning, In-Vehicle Navigation & Tracking
Forward planning of a route                           None                                                                                            Bus stops
                                                                                                                                                      Vanity road names
                                                                                                                                                      Vanity suburb names
In-vehicle navigation during a route                  None
Tracking of vehicles in the field                     None
Route Analysis & Modelling
Transport modelling analysis for postal               AP addressing information
rounds and line haul routes                           Alignment with a national dataset
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Business Requirement                                  Fundamental Elements in addition to the 4      Comments             Additional Significant Elements
                                                      fundamental elements identified for EM
Analysis of catchment areas for pedestrian            Integration with pedestrian access datasets:
access                                                shared paths
                                                      bicycle network
Transport modelling for planning future               None
road network demand and requirements




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6.5          Sources of Fundamental Data Elements
The following table outlines potential sources for the 4 fundamental elements identified for EM use.

     Table 8 Potential Sources for the Four Fundamental Elements Identified for EM Use

Element                  Source              Status                                     Comments
Speed limit              MRWA                MRWA have data for State and local         MRWA has a statutory
                                             roads (excluding private roads).           responsibility to allocate speed
                                             Metropolitan area data is complete. For    zones. Preliminary discussions
                                             rural areas the data are currently being   indicate a commitment from
                                             verified. School zones are not currently   MRWA to maintain these data.
                                             in the dataset but will be added.
Flow direction           LGAs, DLI           Data available from Streetsmart for the    A significant maintenance
                         (Streetsmart)       metropolitan area.                         program would be required to
                                                                                        source changes from LGAs on
                                                                                        an ongoing basis.
Turning                  LGAs, DLI           As above                                   As above
restrictions             (Streetsmart)
Height & weight          MRWA                MRWA has height restrictions for           This will require a relationship
restrictions                                 structures only (not including             between data held on structures
                                             powerlines).                               and the road centreline dataset.
                                             MRWA has T44 loading restrictions on
                                             structures.




6.5.1        Contacts
Suggested contacts for these elements are listed below.

Organisation                  Contact(s)                          Position
MRWA                          Geoff Murray                        A/Manager, Data and Systems
MRWA                          Steve Boston                        Manager, Asset and Network Information
                                                                  Branch
DLI                           Allen Halsey                        Manager, Streetsmart
DLI                           Julie Goodgame                      RSA & ROCQI Project Manager




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7.           Recommendations
This section outlines the recommendations of the Data Study and provides the underlying rationale
for each.


7.1          Recommendation 1
Ensure that the development and maintenance of a RRCN will deliver tangible business
benefits which outweigh costs.

Rationale:

     The dataset should only be developed if it can be shown to deliver tangible benefits which
      compare favourably with the expected costs of development and ongoing maintenance.



Specific recommendations are:

     Undertake a further, more detailed assessment to more closely define the requirements, costs
      and practicality of developing and maintaining the dataset;
     Explore potential business models for developing and maintaining the dataset in partnership
      with the private sector;
     Develop a rigorous business case which:
      –     Defines the costs of developing the dataset;
      –     Defines the maintenance costs (based on a formal and well-documented maintenance
            process);
      –     Confirms the business benefits to EM agencies;
      –     Confirms what can realistically be delivered by the dataset, as compared to expectations
            which agencies may have for its reliability (particularly for EM use);
      –     Defines realistic market opportunities for providing access to the dataset to the private
            sector, potential market value and revenue.



7.2          Recommendation 2
Carefully assess the maintenance implications prior to the development of the dataset.

Rationale:

     Development of the dataset should not proceed unless a realistic and achievable maintenance
      process can be developed and agreed upon by the dataset custodians.
     Custodians of the required elements are unlikely to provide this information consistently unless
      there is a tangible benefit to them.

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     In terms of maintenance, a focus on technical considerations alone is unlikely to succeed.
      Stakeholder buy-in and commitment will be required to ensure ongoing success.



Specific recommendations are:

     Define a practical and achievable maintenance process which ensures that the required
      elements are supplied by custodians on a regular basis;
     Ensure that there is a genuine commitment by custodians of the required elements which
      demonstrate business benefits to them;
     For local government develop a realistic maintenance process which considers a range of
      options (these could include goodwill, shared maintenance mechanisms, funding for
      maintenance or legislative change);
     Assess the opportunities for shared maintenance of the dataset (for example between
      WAPOL, FESA, MRWA and DLI).



7.3          Recommendation 3
Improve the maintenance and quality of the existing datasets as part of the overall initiative.

Rationale:

     The RRCN will be built on existing datasets (the DLI road centreline and property street
      address) and will require a higher degree of reliability than is currently available. Issues with
      the existing datasets (related to both maintenance and quality) should be addressed as part of
      any initiative to develop elements which extend the existing data.



Specific recommendations are:

     Align the development of an improved data maintenance process (under ROCQI) with any
      RRCN initiative;
     Develop the RRCN as a holistic initiative which addresses potential quality improvements to
      the property street address dataset.



7.4          Recommendation 4
Develop the dataset in manageable stages.

Rationale:




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     Significant work will be required to develop and maintain even limited elements for a RRCN.
      Developing the dataset in manageable stages will:
      –     Support a focus on deploying few elements which are highly reliable, rather than
            numerous elements which will be costly to capture and maintain;
      –     Support a more attainable business case, with the supply of only critical elements which
            deliver the most benefit and require a lower total maintenance cost;
      –     Enable benefits to be realised more quickly;
      –     Ensure that business benefits can be assessed prior to the addition of further elements;
     Development of the dataset should focus on initially adding only limited elements, and
      ensuring that these elements are effectively managed to deliver the required overall reliability.



Specific recommendations are:

     Develop the dataset to initially deliver only the 3 fundamental elements identified by this Data
      Study (or 4 including height and weight restrictions);
     Develop the dataset to initially cover the metropolitan area only, with a view to expanding
      coverage the Emergency Services Directory areas as a following release.



7.5          Recommendation 5
The dataset should be developed, where possible as part of a national framework.

Rationale:

     There are clear requirements for a national dataset from organisations operating nationally
      (notably logistics organisations, including AP).



Specific recommendations are:

     The ICSM should be kept closely informed of progress to help ensure alignment with a
      national RRCN;
     The dataset should be developed in line with a national framework using lessons learnt from
      similar projects such as EuroRoadS.




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                7.6            Risks
                      Table 9 Key Project Risks




                                                                                                                                                                                                               CONSEQUENCE




                                                                                                                                                                                                                                              LEVEL OF RISK




                                                                                                                                                                                                                                                              OVERALL RISK
                                                                                                                                                                                                                             RATING (A x B)




                                                                                                                                                                                                                                                              PRIORITY FOR
RISK                                    CAUSE (HOW IT CAN HAPPEN)                        EFFECT (WHAT CAN HAPPEN)                            MITIGATION STRATEGY




                                                                                                                                                                                                  LIKELIHOOD




                                                                                                                                                                                                                             INITIAL RISK
                                                                                                                                                                                                  RATING (A)



                                                                                                                                                                                                               RATING (B)




                                                                                                                                                                                                                                                              PROJECT
A RRCN used for developing                 Data inaccuracy/ out of date.                Response times could increase.                         Focus on data maintenance to deliver                                                                         1
recommended routes could direct a          Data errors.                                                                                         maximum overall reliability.
                                                                                                                                                                                                  4            5             20               High
vehicle along a route which cannot         Temporary changes to the physical                                                                   Gain input from users of the data in the
be travelled.                               network.                                                                                             maintenance process.
                                                                                                                                                Hold a forum to manage EM expectations of
                                                                                                                                                 the dataset and specifically workshop this
                                                                                                                                                 issue.
Agencies may be unable to support       Agencies have other priorities and may not       The dataset may become outdated and the                Ensure that stakeholders’ commitment to                                                                      1
the ongoing maintenance process         feel that the RRCN is core business.             dataset and RRCN then become unreliable.                maintaining the dataset is based on tangible
                                                                                                                                                 benefits to them, rather than goodwill.          4            5             20               High
and associated costs.
                                                                                                                                                In the case of LGA’s develop a realistic
                                                                                                                                                 maintenance process which considers a
                                                                                                                                                 range of options (these could include
                                                                                                                                                 goodwill, shared maintenance mechanisms,
                                                                                                                                                 funding for maintenance or legislative
                                                                                                                                                 change).
For EM use drivers/navigators will      An automated system produces a                   Response times could increase.                      Work closely with FESA and WAPOL to                                                                              2
develop an over-reliance on             recommended route which is followed                                                                  determine how recommended routes would be
                                                                                                                                                                                                  4            4             16               High
recommended routes.                     without question by drivers/navigators who                                                           handled and the impact of any unreliability on the
                                        may lack local knowledge. The                                                                        overall benefits of a RRCN.
                                        recommended route may be slower due to                                                               Develop a reporting feedback mechanism that
                                        traffic conditions or temporary changes to the                                                       can then involve FESA, WAPOL and other users
                                        network.                                                                                             as part of the error reporting process (this is
                                                                                                                                             currently done by WAPOL).
Data updates may not be supplied           LGAs likely to focus on core activites;      Changes to the network could occur which are        Develop a realistic maintenance process which                                                                    3
by LGAs at the required frequency.         Limited perceived benefit to some LGAs;      not reflected in the dataset resulting in routing   considers a range of options (these could include
                                                                                                                                                                                                  5            3             15               High
                                           Staff changes affect commitment.             errors.                                             goodwill, shared maintenance mechanisms,
                                                                                                                                             funding for maintenance or legislative change).
Ongoing problems with the               The property street address dataset could be     The RRCN may not deliver the expected benefits      Include the necessary changes to the property        2            5             10               Med             4
reliability of addresses may            treated as an independent dataset. Further       (due to the impact of lack of or incorrect          street address dataset as part of the overall
significantly diminish the utility of   work on the development of a RRCN may            addressing on the routing of vehicles).             RRCN project. This could include data quality,
the dataset.                            not take into account necessary changes to                                                           maintenance and the potential to integrate
                                        the property street address dataset.                                                                 addresses with the RRCN at-source by DLI.
There may be changes to the                There are a number of sources for            The dataset may contain errors.                     Develop a maintenance process which takes this       5            2             10               Med             4
network which are missed, even              updates to the road network. There may                                                           into account, and:
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                                                                                                                                                                                                               CONSEQUENCE




                                                                                                                                                                                                                                              LEVEL OF RISK




                                                                                                                                                                                                                                                              OVERALL RISK
                                                                                                                                                                                                                             RATING (A x B)




                                                                                                                                                                                                                                                              PRIORITY FOR
RISK                                    CAUSE (HOW IT CAN HAPPEN)                          EFFECT (WHAT CAN HAPPEN)                          MITIGATION STRATEGY




                                                                                                                                                                                                  LIKELIHOOD




                                                                                                                                                                                                                             INITIAL RISK
                                                                                                                                                                                                  RATING (A)



                                                                                                                                                                                                               RATING (B)




                                                                                                                                                                                                                                                              PROJECT
with a comprehensive maintenance            be difficulties integrating the information                                                         Involve FESA, WAPOL and other vehicles as
process.                                    or changes may be missed due to human                                                                part of the error reporting process (this is
                                            error.                                                                                               currently done by WAPOL);
                                           Updates may not be supplied by some                                                                 Manage the expectations of users of the
                                            stakeholders.                                                                                        RRCN to ensure awareness that the dataset
                                                                                                                                                 may contain errors.
There could be technical difficulties   The integration of these data has not been            Additional project costs.                     Assess any potential technical issues as part of     4            2             8                Med             5
integrating datasets (such as road      tested as part of the current project.                Work-arounds may be required.                 the following stage of considering implementation
infrastructure data held by MRWA),                                                                                                           of a RRCN project.
or difficulties in setting up shared
editing of the data.
The dataset may not deliver the         The Data Study excludes from scope                    Costs of developing and maintaining the          As part of a further study work closely with                                                                 5
expected business benefits.             examination of business needs. Benefits are            dataset may exceed business benefits.             FESA and WAPOL in particular to determine
                                                                                                                                                 the likely, tangible benefits of using the       2            4             8                Med
                                        expected to be quantified in the next                 Funding for the ongoing maintenance of the
                                        proposed stage of the RRCN development                 dataset may be withdrawn, resulting in the        RRCN.
                                        process.                                               dataset becoming outdated.                       Examine options for funding the ongoing
                                                                                                                                                 maintenance and obtain a commitment before
                                                                                                                                                 proceeding with the development of the
                                                                                                                                                 dataset.
It may not be possible to prove a       Further investigation may show that the               Agencies may not commit to supporting the        Develop a business case which realistically      3            2             6                Low             6
business case for developing and        costs of development and maintenance                   dataset.                                          compares costs and benefits.
maintaining the dataset.                could outweigh the benefits to agencies.              The project may not proceed to the               Ensure that the following stage of the project
                                                                                               development stage.                                recommends that the dataset is only
                                                                                                                                                 developed if the business case is realistic.
                                                                                                                                                 The business case should not be seen as a
                                                                                                                                                 mechanism to find justification for a RRCN,
                                                                                                                                                 but rather a realistic test of whether the
                                                                                                                                                 dataset should be developed or not.
The dataset may not deliver             Agencies may not have sufficiently critical           These agencies are unlikely to commit funds   Develop a realistic business case which reflects     5            1             5                Low             7
benefits (which outweigh costs) for     requirements to justify the cost of developing         and/or resources to the maintenance of the    tangible benefits for agencies.
non-EM agencies.                        and maintaining the dataset. Note that the             dataset.
                                        criticality of agencies’ requirements has not         The business case may need to be proven for
                                        been clearly defined through this initial study.       use of the RRCN by EM agencies only.
It may not be possible to agree on a    Other states may have different                    A national data framework and network may not     Work closely with the ICSM Roads Working             2            2             4                Low             8
data framework which meets WA           requirements.                                      be produced.                                      Group in developing a framework for the RRCN
requirements and those of other                                                                                                              to ensure maximum buy-in.
states.




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Appendix A Study Participants
7.7          Workshop Participants
The following table lists the participants at the stakeholder workshop.

Attendee                  Position                                            Organisation
Andrew Mugge              GIS Coordinator - IS                                City of Swan
Ben Jarlett                                                                   FESA
Bill Thomson              Manager, Counter Disaster Planning and Special      St John Ambulance
                          Events                                              Australia
Brett McGregor            Geospatial Information Services Officer - SLIP      FESA
Chris Tweedie                                                                 DLI
Dione Bilick              Senior Project Officer - Shared Land Services       DLI
Douglas Brown             Manager, Database Services Branch                   Australia Post
Fermina Metcalfe                                                              CALM
Francois Sauzier          Senior Cartographer                                 DPI
Gary Fenner               Director                                            DLI
Geoff Murray              Manager                                             MRWA
Grace Yun                 GIS/Data Administrator                              WAPOL

Janet Iverach             Principal Research Analyst, Spatial Information &   DPI
                          Research Program
Jason Batory                                                                  DoA
Julie Goodgame            RSA & ROCQI Project Manager                         DLI
Karen Lopez               Senior Policy Officer, Disaster Preparedness and    Department of
                          Management Unit                                     Health
Kev Gray                  Manager Special Projects                            FESA
Mark Taylor                                                                   FESA
Matt Devlin               Coordinator GIS Analysis & Data Management          DPI
Patricia Mobilia          GIS Administrator                                   WA Police
Patrick Francis                                                               Water Corp
Peter Ingwersen                                                               WALIS
Robyn Wilson              Manager Spatial Data                                CALM
Steven Davis              Senior Transport Planner                            DPI
Tony Ferguson                                                                 Water Corp




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7.8          Interviewees
The following table lists stakeholders who were contacted individually for specific input into the
Data Study.

Interviewee                              Position                                 Organisation
Allen Halsey                             Manager, Streetsmart                     DLI
Andrew Mugge                             GIS Coordinator - IS                     City of Swan
Brendan Power                            GIS Coordinator                          FESA
Geoff Murray                             A/Manager, Data and Systems              MRWA
Julie Goodgame                           RSA & ROCQI Project Manager              DLI
Marty Stamatis                                                                    DLI
Patricia Mobilia                         GIS Administrator                        WAPOL
Steve Boston                             Manager, Asset and Network Information   MRWA
                                         Branch
Steve Rowlands                           A/Manager, Spatial Data                  CALM




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         Appendix B Workshop Outcomes
         B.1          Rankings Used in This Section
         This Appendix presents the workshop outcomes in four areas: business drivers; business needs;
         broad dataset requirements and specific elements.

         Following the workshop each agency was asked to rank:

              the top three outcomes in each area (as a minimum); and
              as many of the remaining outcomes in each area as possible.
         The same ranking system has been applied to all four areas as follows:


               Rank                     Meaning
               3                        High - very important
               2                        Medium – moderately important
               1                        Low – unimportant
               0                        No importance at all
               N/A                      Not applicable
               U                        Unknown




         B.2          Business Drivers
         This table provides a list of the high-level business drivers which underpin the business
         requirements in the following section.

                                                                                                Rank
Key Drivers                                                                Agencies, Business
                                                                                                       City of Swan




                                                                           Area                                                 Ambulance
                                                                                                                      WAPOL


                                                                                                                                St John
                                                                                                DLI




The need to improve operational efficiencies.                              WC, CALM, Local      1      3              3       2
                                                                           Government, FESA.
The need to improve response times.                                        FESA, WAPOL, DPI                           3       3
The need to reduce any legal liability associated with staff working                            2                     U       1
in the field.
The need to make better use of existing data (through integration).                                                   2       2
The need to improve efficiencies in travel (for the government,                                                       0       2
business and the community).
The need to increase revenue from existing products.                       DLI                  3                     N/A     N/A
Support of a government initiative to provide customer self-service                                                   N/A     N/A
(for business and the community).

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                                                                                                Rank
Key Drivers                                                                Agencies, Business




                                                                                                       City of Swan




                                                                                                                                Ambulance
                                                                           Area




                                                                                                                      WAPOL


                                                                                                                                St John
                                                                                                DLI
Support of the National RCN initiative.                                                                               1       0
The need to manage public safety.                                          FESA                                       3       2
An increased focus on strategic land use and transport planning.           DPI                  3                     1       1




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B.3          Business Needs
This table provides a collated view of the business needs documented by each table at the workshop. The ‘Agencies, Business Area’
column shows which agencies or business area expressed each need (where this was provided).

                                                                                                                          Rank
 Business Need                                             Agencies,           Notes/ Issues




                                                                                                                                 City of Swan
                                                           Business Area




                                                                                                                                                              Ambulance
                                                                                                                                                      WAPOL


                                                                                                                                                              St John
                                                                                                                                                DoA
                                                                                                                          DLI
 Emergency Management - planning and
 preparedness
 Emergency management planning and                         WC, CALM, Local     Requires information on the                         2            2      2        2
 preparedness.                                             Government, FESA,   network and its condition.
                                                           DoA.
 Asset management.                                         CALM                Requires information on bridges,                    2                   2        2
                                                                               culverts, pipes and drains.
 Emergency Management - response

 Emergency management response                             WC, CALM, Local     Requires information on                                          2      3        3
 planning and modelling.                                   Government, FESA,   accessibility, distance, travel time,
                                                           DoA                 direction of approach and
                                                                               pedestrian access.
 To attend to incidents in the optimal                     Ambulances,         DoH requirement is for the Urban                                        3        3
 response time.                                            WAPOL, DoH,         Search and Rescue (USAR)
                                                           FESA                Disaster Medical Assistance Team.
                                                                               Requires information on the
                                                                               quickest travel time.
 Re-routing and traffic management                         CALM                                                                                        2        3
 (following incidents).


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                                                                                                                         Rank
 Business Need                                             Agencies,           Notes/ Issues




                                                                                                                                City of Swan
                                                           Business Area




                                                                                                                                                             Ambulance
                                                                                                                                                     WAPOL


                                                                                                                                                             St John
                                                                                                                                               DoA
                                                                                                                         DLI
 Deployment of medical teams (without                      DoH                                                                                        2        2
 sirens).
 Emergency Management - recovery

 Emergency management recovery (post-                      WC, CALM, Local     Requires information on CALM                                           2      N/A
 incident works programming).                              Government, FESA    road network to enable planning of
                                                                               access (in/out).
 To access services (such as hydrants, or                  WC, CALM, Local                                                                            1      N/A
 for WC contractors to access sewer drains).               Government, FESA.
 Routing of heavy, wide and high loads.                    CALM                Requires information on the                                            2      N/A
                                                                               suitability of the network for these
                                                                               loads.
 Assessment of response performance                        FESA, WAPOL,                                                                               2        2
 following an incident.                                    CALM, DoH
 Route Navigation

 To enable officers to find their way to                   DLI, EM agencies,   For DLI and DPI this includes              3                    3      2        3
 properties/incidents (in-vehicle navigation).             SES, DPI, DoA.      valuers and surveyors.
 To enable navigation on rubbish collection                Local Government/                                                      2                  N/A     N/A
 rounds.                                                   contractors
 In-vehicle navigation for the community.                  DLI                 This could be produced as a                2                          N/A     N/A
                                                                               saleable product by DLI.
                                                                               Requires current information on the
                                                                               network (restrictions, temporary
                                                                               road closures and speed limits).

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                                                                                                                          Rank
 Business Need                                             Agencies,             Notes/ Issues




                                                                                                                                 City of Swan
                                                           Business Area




                                                                                                                                                              Ambulance
                                                                                                                                                      WAPOL


                                                                                                                                                              St John
                                                                                                                                                DoA
                                                                                                                          DLI
 In-vehicle navigation for business users.                 Includes property     For property professionals this           1                           3        1
                                                           professionals,        would require address and network
                                                           transport/logistics   information for new suburbs.
                                                           companies,
                                                           couriers, taxis and
                                                           school buses.
 Resource Management & Tracking                                                                                                                        2

 To manage the allocation of resources.                    Fleet management                                                                            2        2
                                                           for government
 To monitor resources (vehicle locations).                                                                                                             2        2

 Management of occupational health and                                           Requires information on the                                           2        1
 safety risks.                                                                   direction of approach and the ability
                                                                                 to re-direct vehicles based on
                                                                                 network restrictions.
 Route & Journey Planning

 Recreation and tourism.                                   CALM, Local           To enable the planning of routes by               1                  N/A     N/A
                                                           Government.           the public and CALM.
 Journey planning for the community                        PTA                                                                                         1      N/A
 (vehicle and pedestrian).
 Works programming/ planning.                              -                                                                                          N/A     N/A

 Transport logistics.                                      -                                                                                           1      N/A


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                                                                                                                  Rank
 Business Need                                             Agencies,       Notes/ Issues




                                                                                                                         City of Swan
                                                           Business Area




                                                                                                                                                      Ambulance
                                                                                                                                              WAPOL


                                                                                                                                                      St John
                                                                                                                                        DoA
                                                                                                                  DLI
 Route Analysis & Modelling

 Transport modelling analysis for postal                   AP                                                                                  1      N/A
 rounds and line haul routes (National Heavy
 Fleet).
 Analysis of service areas for EM vehicles.                FESA                                                                                2      N/A

 Analysis of catchment areas for pedestrian                DPI, FESA       To support planning which takes                                    N/A     N/A
 access.                                                                   into account pedestrian access.
 Transport modelling for planning future road              DPI                                                                                 0        2
 network demand and requirements.
 Management of public events and parking.                  -                                                                                   1        3




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        B.4          Dataset Requirements
        B.4.1        Broad Requirements (From Session 1 of the Workshop)
        As each table documented their business needs some specific requirements for the dataset were
        identified. The following table lists these needs (note that the specific elements which are required
        to support them have been itemised in the following section).

                                                                                           Rank

Dataset Requirements                                                      Agencies,




                                                                                                  City of Swan
                                                                          Business Area




                                                                                                                               Ambulance
                                                                                                                       WAPOL


                                                                                                                               St John
                                                                                                                 DoA
                                                                                           DLI
The ability to enable routing on: distance; travel time;                                    3                    2     3        2
traffic condition, roadworks (eg road closures); road
quality.
The ability to determine the quickest travel time.                                          2                          3        3
The ability to locate rural properties (requires rural street                                                    3     3        3
addressing).
Information on the network and its condition.                                                                          2        1
Information on accessibility, distance, travel time, direction                                                   1     2        3
of approach and pedestrian access.
Information on CALM road network                                                                                       2        2
Information on bridges, culverts, pipes and drains.                       CALM                                         2        2
Information on the suitability of the network for heavy,                  CALM, AP                                     2        0
wide, long and high loads.
The ability to re-direct vehicles based on network                        CALM                     2                   3        1
restrictions.
Address and network information for new suburbs.                                                                       3        3
Current information on the network (restrictions, temporary               Community and            2                   3        2
road closures and speed limits.                                           business users
The ability to calculate average travel time (requires                                      1                          1        1
information on distance, speed, interruptors and peak
loading).
The ability to determine travel risk (requires information on                                                          3        1
safe speed, condition, signage and bends).




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          B.4.2        Specific Elements
          This table lists all of the elements identified at the workshop. Note that this table is based on the information gathered at the workshop only
          and is not intended to provide a complete picture of the status or any issues related to each element. This information will be completed as
          the project progresses.

                                                                                                                                                                     Rank
Element (Attribute or Geometry)                   Potential                 Dataset Status (where known)                     Notes/ Issues




                                                                                                                                                                                   City of Swan
                                                  Source(s)




                                                                                                                                                                                                        Ambulance
                                                                                                                                                                     WAPOL




                                                                                                                                                                                                        St John
                                                                                                                                                                                                  DoA
                                                                                                                                                                             DLI
Physical Network & Connectivity
Road centreline geometry                          DLI, MRWA, Local          MRWA has information on State Roads only,        The data study is based on the use of   3       3     3              3     O
                                                  Government                no CALM, Forestry or private roads.              the DLI dataset as a routable road
                                                                                                                             centreline network.
                                                                                                                             The currency and accuracy of the
                                                                                                                             dataset was questioned.
Traffic lights                                    MRWA, Local               MRWA have data for all traffic light                                                     2             1                    1
                                                  Government                installations on state and local roads.
Roundabouts                                       MRWA, DLI, Local          MRWA have data for State roads (stored as a                                              2                                  0
                                                  Government                separate road number) and local roads (stored
                                                                            as a connecting point in the network). MRWA
                                                                            do not store a true representation of the
                                                                            roundabout layout.
                                                                            DLI dataset (Streetsmart) is for the
                                                                            metropolitan area and regional cities/towns
                                                                            only.
Other road connectors (ramps, slip                DLI, MRWA                 MRWA has data on Ramps, not slip roads.                                                  1                                  0
roads).
Shared paths                                      DPI, MRWA                 MRWA has data on Principal Shared Paths          Dataset changes frequently.             1                                  0
                                                                            only.
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                                                                                                                                                                      Rank
Element (Attribute or Geometry)                  Potential                 Dataset Status (where known)                         Notes/ Issues




                                                                                                                                                                                    City of Swan
                                                 Source(s)




                                                                                                                                                                                                         Ambulance
                                                                                                                                                                      WAPOL




                                                                                                                                                                                                         St John
                                                                                                                                                                                                   DoA
                                                                                                                                                                              DLI
Bicycle network                                  DPI                       Coverage is for the metropolitan area only           Dataset changes frequently.           1                                  0
Walk trails                                      DPI                                                                                                                  1                                  0
Temporary road closures                          MRWA, LGAs,               MRWA has some data in corporate database             This could include closures from      3                            1     2
                                                 WAPOL                     for flooding etc but not for temp. closures due      roadworks, events or resulting from
                                                                           to roadworks, public events etc. WAPOL for           flooding.
                                                                           events road closures.
Temporary lane closures                          MRWA, LGAs                Note: Not in MRWA corporate database.                                                      2                                  1
Temporary signals                                MRWA                      Note: Not in MRWA corporate database.                Roadworks could result in temporary   2                                  0
                                                                                                                                traffic signals.
Flow direction (one-way streets)                 LGAs, DLI                                                                                                            3       2                          1
                                                 (Streetsmart series)
Railway crossings                                DLI (Streetsmart          DLI dataset (Streetsmart) is for the                                                       3                                  1
                                                 series), LGAs, PTA        metropolitan area and regional cities/towns
                                                                           only.
                                                                           MRWA has statewide coverage for state and
                                                                           local roads
Turning restrictions (imposed) and               DLI (Streetsmart          DLI dataset (Streetsmart) is for the                 Turning restrictions which are        2             2                    0
times                                            series), LGAs             metropolitan area and regional cities/towns          imposed either permanently or at
                                                                           only. No distinction is made between the types       certain times.
                                                                           of turning restrictions.
                                                                           MRWA does not store details of imposed
                                                                           turning restrictions at traffic signals.
Turning restrictions (physical)                  DLI (Streetsmart          There is no comprehensive data set for               Turning restrictions which are        3       1     2                    0
                                                 series), LGAs             physical turning restrictions.                       imposed by a physical barrier. This
                                                                                                                                includes barriers at intersections;
                                                                                                                                barriers which prevent turning from
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                                                                                                                                                                        Rank
Element (Attribute or Geometry)                     Potential                 Dataset Status (where known)                     Notes/ Issues




                                                                                                                                                                                      City of Swan
                                                    Source(s)




                                                                                                                                                                                                           Ambulance
                                                                                                                                                                        WAPOL




                                                                                                                                                                                                           St John
                                                                                                                                                                                                     DoA
                                                                                                                                                                                DLI
                                                                                                                               either flow direction and U-turns.
Median barriers                                     Unknown                   MRWA has data for state roads only.              These relate to physical turning         3
                                                                                                                               restrictions.
Journey Commencement/
Destination
Property street address                             DLI, LGAs, DoA                                                             The DLI dataset has addresses linked     3                            3     2
                                                                                                                               to the cadastre. There may be a need
                                                                                                                               to link an addresses to a point on the
                                                                                                                               road (rather than the cadastre).
Incidents                                                                                                                      Location of emergency incident(s)        3                                  2
Property ownership/ manager                         MRWA, CALM,                                                                Location of emergency incident(s)        2                            3     2
                                                    LGAs, DoA.
Bus stops                                           PTA                                                                                                                 1                                  0
Travel Time
Fixed speed limits                                  MRWA, CALM                MRWA have data for State and local roads         There is a distinction between           2                                  1
                                                                              (excluding private roads). Metropolitan area     imposed speed limits and safe travel
                                                                              data is complete. For rural areas the data are   speeds (which will vary for different
                                                                              currently being verified. School zones are not   vehicles).
                                                                              currently in the dataset but will be added.
                                                                              CALM dataset has speed information but is
                                                                              not yet complete.
Temporary speed limits                              MRWA                      Not in corporate database                                                                 2                                  0
Chicanes and other traffic calming                  LGAs                                                                                                                2                                  0
devices
Peak traffic loading                                                          MRWA has peak traffic data for selected sites.                                            2                                  0
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                                                                                                                                                                         Rank
Element (Attribute or Geometry)                  Potential                 Dataset Status (where known)                        Notes/ Issues




                                                                                                                                                                                       City of Swan
                                                 Source(s)




                                                                                                                                                                                                            Ambulance
                                                                                                                                                                         WAPOL




                                                                                                                                                                                                            St John
                                                                                                                                                                                                      DoA
                                                                                                                                                                                 DLI
Traffic volume                                                             MRWA has traffic volume data for selected           This will vary according to the time of   1                                  0
                                                                           sites, but has traffic sections for all state       day and time of year.
                                                                           roads.
Lane/ road width                                 MRWA, DLI, CALM           MRWA have actual lane widths stored as                                                        2             1                    0
                                                                           width of seal (this varies in the dataset
                                                                           according to the date of capture/update).
                                                                           DLI data specifies whether lanes under or over
                                                                           6m.
Number of lanes                                  MRWA                      Some coverage                                                                                 2       1                          0
Surface type (sealed or unsealed)                MRWA, DLI, CALM           MRWA has data for all state and local roads.                                                  2       2     2                    1
                                                                           CALM data is for CALM roads only.
Surface condition                                MRWA                      MRWA data is for State roads only.                  Note that the meaning of surface          2                                  2
                                                                                                                               condition can be ambiguous.
Areas subject to flooding                        Unknown                   MRWA has some data but not in corporate                                                       3                                  1
                                                                           database.
School zones                                     Unknown                                                                                                                 2                                  1
Road classification (functional road             MRWA, CALM                The MRWA dataset classifies roads according         Actual road characteristics (width,       0       3     2                    2
hierarchy)                                                                 to functional road hierarchy as: primary            seal, condition) may vary within each
                                                                           distributor; district distributor (A); district     classification and along the length of
                                                                           distributor (B); local distribution; access roads   a road.
                                                                           (LGA managed roads).
                                                                           CALM data is for CALM roads only.
Navigation
Road names                                       DLI (geonoma              Coverage of the DLI dataset may not be              MRWA road names don’t change.             3       3     3              2     3
                                                 dataset), MRWA            complete.                                           The expectation for road names
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                                                                                                                                                                     Rank
Element (Attribute or Geometry)                  Potential                 Dataset Status (where known)                     Notes/ Issues




                                                                                                                                                                                   City of Swan
                                                 Source(s)




                                                                                                                                                                                                        Ambulance
                                                                                                                                                                     WAPOL




                                                                                                                                                                                                        St John
                                                                                                                                                                                                  DoA
                                                                                                                                                                             DLI
                                                 (local road names)        MRWA Road Centreline for state roads has         needs to be determined (official
                                                                           MRWA road names, not official road names.        names compared to common use
                                                                                                                            names).
Vanity road names                                Unknown                                                                    Alternative road names (vanity           3       2     1                    3
                                                                                                                            addresses).
Vanity suburb names                              Unknown                                                                    Alternative suburb names (vanity         3       1     1                    3
                                                                                                                            addresses).
Route names                                      Unknown                                                                    Alternative road names to simplify the   2                                  1
                                                                                                                            description of a route (where a road
                                                                                                                            changes its official name along the
                                                                                                                            route).
Lane changes                                     Unknown                                                                                                             2                                  0
Traffic signs                                    Unknown                   MRWA has regulatory signs in corporate                                                    1                                  0
                                                                           database.
Special Restrictions
Load restrictions                                MRWA                      Coverage may not be complete for the             Licensing of overweight/width/length     2             1                    0
                                                                           metropolitan or regional areas. No data for      loads off the endorsed network
                                                                           private roads.                                   requires LGA approval.
Height restrictions (bridges and                 MRWA, DLI                 MRWA has height restrictions for structures                                               2       3                          1
powerlines)                                      (topographic              only, no powerlines.
                                                 dataset)
Length/ turning restrictions                     Unknown                                                                                                             2       2                          0
Gradient (or significant gradients)              MRWA                      MRWA has some data but this is not                                                        2                                  1
                                                                           complete.
Control of access (imposed access                MRWA, CALM                MRWA has Control of Access data for road         Where access is restricted to certain    3       1                          0

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                                                                                                                                                                      Rank
Element (Attribute or Geometry)                    Potential                 Dataset Status (where known)                   Notes/ Issues




                                                                                                                                                                                    City of Swan
                                                   Source(s)




                                                                                                                                                                                                         Ambulance
                                                                                                                                                                      WAPOL




                                                                                                                                                                                                         St John
                                                                                                                                                                                                   DoA
                                                                                                                                                                              DLI
restrictions)                                                                sections but not turning restrictions.         authorised officers. This could include
                                                                                                                            roads closed to the public due to
                                                                                                                            dieback.
Truck barriers                                     Unknown                                                                                                            2                                  0
Weight restrictions (road)                         MRD, LGAs                 MRWA has T44 loading restrictions on                                                     2                                  0
                                                                             structures.
Weight restrictions (assets).                      CALM                                                                     These include culverts and buried         2                                  0
                                                                                                                            assets on CALM roads.
Safety Features
Street lighting                                    Unknown                                                                                                            2                                  0
Rest areas                                         Unknown                   MRWA has data on roadside stopping places                                                2                                  0
                                                                             for state roads.
Arrestor beds                                      Unknown                   MRWA has this data (only 3 in the state).                                                2                                  0
Emergency phones/ witness plates                   Unknown                   MRWA has emergency phones for state                                                      3                                  1
                                                                             roads.
Points of Interest
Land use                                           DPI, DLI, LGAs                                                           Land use of surrounding land parcels.     1       3                    1     0
                                                                                                                            Issues include lack of currency and
                                                                                                                            different classifications used.
Fuel stations                                                                                                               If the RRCN is to be produced as a                1                          1
                                                                                                                            product thus information may well be
                                                                                                                            required in order to match the
                                                                                                                            information provided in commercial
                                                                                                                            products.
                                                                                                                            Currency and maintenance of this
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                                                                                                                                                             Rank
Element (Attribute or Geometry)                   Potential                 Dataset Status (where known)                          Notes/ Issues




                                                                                                                                                                           City of Swan
                                                  Source(s)




                                                                                                                                                                                                Ambulance
                                                                                                                                                             WAPOL




                                                                                                                                                                                                St John
                                                                                                                                                                                          DoA
                                                                                                                                                                     DLI
                                                                                                                                  information is an issue.
Tourist information bays                                                    MRWA has these included in Roadside                                                                                 0
                                                                            Stopping Places.
Medical facilities                                                                                                                                                                              3
Public toilets                                                              MRWA has Roadside Stopping Places, with                                                                             0
                                                                            attributes indicating existence or not of public
                                                                            toilets.
Parking areas                                                               MRWA has data on roadside stopping places                                                2                          0
                                                                            for state roads, these include parking bays but
                                                                            not parking areas.
Schools                                                                                                                                                                                         1




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B.5          Issues Noted
     Property street address information for rural areas may not be as reliable as addresses for the
      metropolitan area.
     For the despatching of trucks (such as for line haul routes managed by Australia Post) there is
      a need to know any restrictions on vehicle turning (physical constraints imposed at specific
      junctions).
     In routing or navigating to areas of new development unsigned streets may be an issue.
     Routing software may ignore specific incident-related information (such as the location of a
      plume) which may be essential in determining the direction from which services should
      approach an incident.
     Some agencies require information on private roads. This information is not readily available,
      either for determining the accessibility of sites or for using as an input into a routable network.
     There is a distinction between legal speed limits and ‘safe’ speeds. WAPOL indicated that
      information would be useful on legal and ‘safe’ speeds.
     Special restrictions (which are vehicle-dependent) could include buried assets (such as
      culverts and pipes).
     For navigation of heavy goods vehicles the network may need additional attributes such as a
      lane which the vehicle must move into to approach an intersection.
     A distinction needs to be made between official and common-use road names and names for
      routes (it was felt that confusion could occur where a road name changes along a route).
     For the RRCN to be marketed as a commercial product it may require a range of additional
      attributes (such as points of interest) to be comparable to existing commercial products.
     There is a need (notably from DPI) for the RRCN to be integrated with a pedestrian network
      (including walk paths, trails and bicycle paths).
     For emergency management a key issue is that the RRCN is the same dataset used by all EM
      agencies (with the same currency, access and coverage). This follows the principle put
      forward in the Shared Land Information Platform (SLIP) Implementation Plan of providing EM
      agencies with the ‘same information at the same time’.
     The RRCN will need to be capable of integrating into a National network model.



B.6          Future Needs
     It was noted that Commonwealth Government executive vehicles are currently fitted with
      navigation software, and that there is likely to be an increased need for both navigation and
      tracking of government fleet vehicles in the future. This is likely to be focussed on:
      –     improving the efficiency in the use and management of fleet vehicles;
      –     tracking the location of vehicles (especially in remote areas) from an occupational health
            and safety perspective).


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     There is a move towards greater use and availability of real-time on-board navigation for traffic
      control.




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Appendix C DLI Road Network Metadata
1.     DATASET
Road Network

2.         CUSTODIAN
           Custodian:                                Geographic Services, Department of Land Information
           Custodian Address:                        1 Midland Square, MIDLAND WA 6056
           Contact:                                  Julie Goodgame
           Source:                                   Department of Land Information

3.        DATA DESCRIPTION
The roads dataset, which complies with WALIS defined specifications, has been built in response to
increasing demands from both public sector and industry organizations for an intelligent robust road centreline
dataset. The roads dataset has been compiled by merging the roads layers of the metropolitan street
directory, 1:25000, 1:50000 and 1:100000 digital datasets.

Metadata (spatial and attribute) is organised at the feature level. Road names are listed in the "geonoma.txt"
file. The "geonoma_id" field (integer) is the link to the spatial information. Positive ids indicate valid roads
names. A zero id indicates the spatial data has not been tagged. Negative ids indicate tagged but unvalidated
road names. Three specific negative ids (-9999999x) indicate NO ROAD NAME, a spatial edit is required
before the data can be tagged or an administrative action (eg.consultation with LGA) is required before the
data can be tagged. The current quality improvement project is eradicating all of the zero and negative
geonoma.ids.


4.         DATA QUALITY
           Data Currency:            Beginning date:              01 January 1968
                                     Ending Date:                 Current
           Data Status:              Progress:                    In progress
                                     Maintenance:                 As Required
        Data Quality:
 Lineage              The roads dataset was compiled from the metropolitan street directory, 1:25000,
                      1:50000 and 1:100000 digital base data. This information was originally captured
                      photogrammetrically then either scanned or hand digitized and stored in MicroStation
                      design files (DGN) or digitized at source using analytical photogrammetric techniques
                      and translated to DGN format. All DGN files have since been loaded into the Arc/Info
                      environment and roads tagged with road name (Geographic Names Register -
                      GEONOMA ID) via an ArcInfo application.
                      Currently the roads are being reviewed using, the cadastral framework and
                      orthorectified aerial photographs to update and capture new roads. The scale of the
                      photography varies from 1:10000 to 1:40000. In remote areas of the State where aerial
                      photographs are not available satellite images will be used to revise the road centre
                      line data.
                      Data available from CALM and Main Roads WA are also used in the road review.
 Positional           Horizontal accuracy is dependant on the source scale of the data. Based on standard
 Accuracy             map accuracy statements (1/4 mm at map scale) the accuracy can range between
                      6.25m and 25m. Where direct capture has been used the spatial accuracy would be
                      better than the minimum specified.
                      The accuracy of the orthorectified varies form +/- 2.0m to +/- 10.0m.
                      The R.M.S error for the cadastre is +/- 0.003m




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 Attribute                  With the exception of the road name and the road hierarchy attributes all others have
 Accuracy                   been derived from the feature code used in the CAD environment to differentiate
                            features.
                            The accuracy of the Road name/suffix/direction information is estimated at better than
                            95%.
                            The road hierarchy has been assigned based on the Main Roads State Network Maps
                            (August 1999). This attribute is no longer supported by MRWA.
 Logical                    Checks for under and overshoots were performed in the MicroStation environment
 Consistency                using third party software. In addition edges between map sheets were checked and
                            corrected where possible. Edge match problems may still exist.            In addition
                            mismatches between zones have not been resolved. Within the Arc/Info environment
                            topological consistency checks to detect flaws in the spatial data are still being
                            performed.
 Completeness               The roads dataset has been compiled from the best available digital topographic
                            information. Selected towns have been revised using cadastral information as a
                            backdrop along with consultation with local government authorities where clarification
                            was required. Maintenance of the dataset is ongoing. The spatial completeness of the
                            dataset is being addressed locally as new roads are being added. The metropolitan
                            roads dataset is consistent with the StreetSmart Perth Street Directory.




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        5.         COVERAGE
                   WA State

        6.         DATA FORMAT
                   Arc View Shape File / Arc Info Coverage

        7.         CO-ORDINATE SYSTEM
                   Datum:                      Geocentric Datum of Australia (1994)
                   Projection:   Universal Transverse Mercator
                   Coordinate:   Geographical, Map Grid of Australia(MGA94)

        8.         DATA TYPE
                   Vectors/Textural

        9.         ATTRIBUTE DESCRIPTION
        Name                          Type                                            Description
Shape                                                   SHAPELINE
FNODE                          Integer (9)              Arc Info System generated number
TNODE                          Integer (9)              Arc Info System generated number
LPOLY                          Integer (9)              Arc Info System generated number
RPOLY                          Integer (9)              Arc Info System generated number
LENGTH                         Integer (19,11)          Length of road segment
ROADS_                         Integer (9)              Arc Info System generated number. Regular number range 1
ROADS_I                        Integer (9)              Arc Info System generated number. Regular number range 2
FEATURE_CODE                   Integer (6)              The Interactive Graphics Design System feature code allocated to different
                                                        type of roads throughout the W.A.(see feature code table).
SPATIAL_QUAL_KEY               Integer (7)              A pointer to a table record that contains quality information about a
                                                        feature’s spatial definition.
ATTRIB_QUAL_KEY                Integer (7)              A pointer to a table record that contains quality information about feature
                                                        attributes.
UFI                            Integer (12)             Unique feature identifier (part of the same road)
SPATIAL_MOD                    Date (8)                 A date that indicates the last time the spatial data, that describes the
                                                        feature, was modified.
ATTRIBUTE_MOD                  Date (8)                 A date that indicates the last time an attribute of the feature was modified.
GEONOMA_ID                     Integer (9)              A pointer to the official name for the feature which is stored in the
                                                        Geographic Names Register database. Not Null.
MRWA_NUMBER                    Character (7)            Road Numbers supplied and supported by Main Roads
MRWA_TYPE                      Character (2)            Main Roads WA sourced road classification type eg. H=Highways, L =Local
                                                        Roads, M=Main Roads, N=None , R =Roundabout
MRWA_HIERARCHY                 Character (2)            NA=Not Applicable

WIDTH                          Character (2)            < 6 = Under or equal 6 metres, > 6 = Over 6 metres, UN = Unknown


MSD_CLASS                      Character (2)            Road     classification e.g. CL=Closed    Road   CN=Connector  ,
                                                        HF=Highway/Freeway, MI=Minor Roads, MN=Main Roads, NA=Not
                                                        Applicable,     NH=National  Highway,   TR=Tracks,  SU=Surveyed
                                                        Unconstructed, UU=Unsurveyed Unconstructed.

SPECIAL_PURPOSE                Character (2)            Other than traffic purpose eg. AR=Access Road, BA=Bus Access,
                                                        CL=Closed Road, CN=Connector, LA=Laneway, ML=Mall Access, NA=Not
                                                        Applicable,  OR=On/Off    Ramp,   RO=Roundabout.,   SU=Surveyed
                                                        Unconstructed, UU=Unsurveyed Uncontructed.

OWNER_TYPE                     Character (2)            Defines the road owner type eg. PU=Public, PR=Private. CL=Closed,
                                                        RE=Restricted, CA=Calm Managed Access ,CN=Connector, SU=Surveyed


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         Name                          Type                                        Description
                                                         Unconstructed, UU=Unsurveyed Uncontructed.

ROAD_TYPE                       Character (2)            Defines the physical road surface eg. SE=Sealed, US=Unsealed,
                                                         CL=Closed Road, SU=Surveyed Unconstructed, UU=Unsurveyed
                                                         Unconstructed, NA=Not Applicable, CN= Connector, NA=Not Applicable,
PCFEAT                          Character (2)            Physical Condition of the Feature eg. CL=Closed, OP=Operational,
                                                         CN=Connector, SC=Captured from Final Survey Certificate, CM=Calm
                                                         Managed Access, SU=Surveyed Unconstructed, UU=Unsurveyed
                                                         Unconstructed , CD=Calm Managed Disease Risk
CONNECTOR_TYPE                  Character (2)            TT=Trafficable, NT=Non Trafficable,




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Appendix D Inventory Collected by MRWA for
           State & Local Roads
This Appendix reproduces the IRIS Inventory Representation Catalogue which defines the data
elements maintained by MRWA for state and local roads (MRWA document number 40/93/10,
issued on 18/10/2002).




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DOCUMENT NO.                   40/93/10
ISSUE DATE                     18/10/2002




IRIS INVENTORY REPRESENTATION CATALOGUE

                                          OVERVIEW

CONTENTS

ROAD INVENTORY SUMMARY
A. DRAINAGE
B. TRAFFIC FACILITIES
C. ROADSIDE FACILITIES
D. GEOMETRY
E. PAVEMENT
F. SURFACING
G. ENVIRONMENT
H. RAILWAY CROSSING & LINE
I. ADMINISTRATION
J. RoMan INVENTORY


This document is owned and authorised by the Manager Asset & Network Information
Branch. Please submit all comments and requests to the Data Policy & Standards
Coordinator, the delegated custodian.


                         All controlled copies shall be marked accordingly




MAIN ROADS Western Australia         Inventory Representation Catalogue – Road Inventory   Page 1
Doc No. 40/93/10
Preface
Main Roads WA has recently replaced the existing mainframe Road Management
Information System (ROMIS) with a client server based off the shelf system tailored to
Main Roads’ Corporate Road Data3 requirements. This new system is called IRIS –
Integrated Road Information System.

A series of catalogues document the collection, use and maintenance of Main Roads
Corporate Road Data for use with IRIS. This includes the following information:

    Definitions
    Representations (both physical and logical)
    Standards
    Systems
    Processes

The Inventory Representation Catalogue provides an overview of the information
required for updating the IRIS Road Inventory System. This catalogue is aimed at
anyone who requires guidance in measuring, collecting, updating and interpreting road
data. This includes staff within Main Roads, Contractors and external stakeholders such
as Local Government.

The document custodian is the Manager Asset & Network Information. This document is
evolving and we appreciate any comments from users. Please address all comments to
Data Policy & Standards Coordinator on Fax (08) 9323 4629 or Tel (08) 9323 4352.

1.0 Disclaimer:
Note that the measurement and referencing guidelines used in this document are recommended
practices by Asset & Network Information Branch. The user may have a requirement to record
more information than is required by these guidelines. For instance certain intersection pavement
treatments may be less than 100m in length. IRIS pavement data collection guidelines do not
require that this treatment is recorded. However, the user has the option of recording these
treatments as IRIS has a 10m linear resolution.

These practices are also subject to review and may change over time. Document version control
will list the changes and registered users will be notified.


How To Use This Document
This document provides summary information and general guidelines for collecting and
updating IRIS Road Inventory information. Detailed information is provided in separate
sections for each of the twelve Inventory Groups that represent Road Inventory. This
document is to be used in conjunction with those sections.

.




3
 Corporate road data is data used by more than one individual or branch that supports the objective of
managing Main Roads WA’s road asset.
MAIN ROADS Western Australia         Inventory Representation Catalogue – Road Inventory           Page 2
Doc No. 40/93/10
2.0 Table 1: Inventory Collected for State Roads

No. Inventory Group Inventory Type             No. Inventory Group                            Inventory Type
A   Drainage           Culvert (Large & Small) H Railway Crossing &                           Railway Crossing
                                                   Line
                       Floodway                                                               Railway Line
                       Drainage Outfall
                       Drainage Section
B   Traffic Facilities Longitudinal Road Line I    Administration                             Adjacent Material
                       Sign                                                                   Commonwealth Class
                       Sign Panel                                                             Control of Access
                       Kerbing                                                                State Electoral
                                                                                              Districts
                               Median                                                         Federal Electorates
                               Safety Barrier                                                 State Electoral
                                                                                              Regions
                               Pedestrian Crossing                                            Function Class
                               Focal Point Marker                                             Local Government
                                                                                              Boundary
C      Roadside                Roadside Stopping                                              Regional Boundary
       Facilities              Place
                               Arrester Bed                                                   Responsibility Area
D      Geometry                Horizontal Alignment                                           Road Closure
                               Vertical Alignment                                             Legal Speed Limit
E      Pavement                Original Traffic
                               Pavement
                               Pavement Widening
                               Shoulder Pavement
                               Pavement Repair
                               Geotextile
F      Surfacing               Lane Surface
                               Shoulder Surface
G      Environment             General Terrain
                               Grid
                               Material Site
                               Obstruction
                               Other Inventory
                               Vegetation Rating
                               Wall
                               Water Bore




3.0 Table 2: Other Inventory Collected for State Roads
No. Inventory Group Inventory Type                            No. Inventory Group             Inventory Type
K   Electrical Services Traffic Signals                       L   Structures                  Timber Bridge
                        Emergency Phone                                                       Major Culvert
                        Incident Detection                                                    Reinforced Concrete
                        Device                                                                Bridge
                        Monitoring Camera                                                     Steel Bridge
                        SCATS Cabin                                                           Prestressed Concrete
                                                                                              Bridge
                               Variable Message Sign                                          Steel/Concrete
                                                                                              Composite Bridge

MAIN ROADS Western Australia            Inventory Representation Catalogue – Road Inventory                  Page 3
Doc No. 40/93/10
                               Roadway Lighting                                               Sign Gantry
                                                                                              Timber Hybrid Bridge
                                                                                              Tunnel



4.0 Table 3: Inventory Collected for Local Roads
No. Inventory Group Inventory Type                            No. Inventory Group             Inventory Type
B   Traffic Facilities Longitudinal Road Line                 I   Administration              Adjacent Material
                       Sign                                                                   Commonwealth Class
                       Sign Panel                                                             Control of Access
                       Kerbing                                                                State Electoral
                                                                                              Districts
                               Median                                                         Federal Electorates
                               Safety Barrier                                                 State Electoral
                                                                                              Regions
                               Pedestrian Crossing                                            Function Class
                               Focal Point Marker                                             Local Government
                                                                                              Boundary
8      Electrical Services Traffic Signals                                                    Regional Boundary
                           Emergency Phone                                                    Responsibility Area
                           Incident Detection                                                 Road Closure
                           Device
                           Monitoring Camera                                                  Legal Speed Limit
                           SCATS Cabin                        J      RoMan Inventory          Local Inventory
                           Variable Message Sign                                              Local Path Summary
                           Roadway Lighting                                                   LG Grants
                                                                                              Commission

In each Inventory Group section the following information is presented for each Inventory
Type:

    Description
    Attribute description
    Guidelines for collecting and updating Attributes (where different from the general
     guidelines or requiring further detailed information)
    Attribute Domain Lists
    Data collection and update examples where relevant

Where a relevant standard or other reference is quoted please see that document for
further details on that Inventory Type. The following documents may be relevant to users
of this catalogue:

    IRIS Network Referencing Catalogue
    IRIS Data Pick Up Field Manual
    IRIS Data Definition Catalogue
    IRIS Data Architecture Catalogue




MAIN ROADS Western Australia            Inventory Representation Catalogue – Road Inventory                Page 4
Doc No. 40/93/10
Definitions And Abbreviations
Attribute:                     A defined data item in IRIS. A Inventory Type has many Attributes

Domain List                    A Domain List is a list of the attributes values. They are sometimes
                               referred to as code tables or list of values. E.g. The Pavement Type
                               domain would be asphalt, concrete, clay, crushed rock etc.
Inventory                      A logical grouping of road Inventories which are either related to
Group:                         each other or have similar properties. For example the Pavement,
                               Surfacing or Drainage Inventory Groups.

Inventory Type:                A physical or a logical road Inventory such as a culvert, median or
                               electoral boundary.

Min Change:                    Minimum Change to attribute in terms of location triggering a new
                               record to be created.

Min Record:                    Minimum Record of Inventory Type triggering a new record to be
                               created.
                               As a general rule, a new record is created if there is a change in the
                               attribute type for more than the min length or area specified

Road Inventory:                The road elements that describe the configuration of the road asset
                               including road geometry, pavement and surfacing attributes, traffic
                               facilities, road markings and other off-road Inventories.

XSP:                           Cross Sectional Position. Term used to reference the position of a
                               road feature across a carriageway.




MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory   Page 5
Doc No. 40/93/10
ROAD INVENTORY
Description                    The road elements that describe the configuration of the road asset
                               including road geometry, pavement and surfacing attributes, traffic
                               facilities, road markings and other off-road Inventory.

                               Table 4summarises the Road Inventory information to be collected
                               and updated (Structures and electrical not included).

                               The Structures Inventory is addressed in the Structures
                               Representation Catalogue and the Electrical Inventory is addressed
                               in the Electrical Representation Catalogue.




MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory   Page 6
Doc No. 40/93/10
INVENTORY GROUP
Description                    A logical grouping of Road Inventory that are either related to each
                               other or have similar properties. For example the Pavement,
                               Surfacing or Drainage Inventory Groups.




MAIN ROADS Western Australia             Inventory Representation Catalogue – Road Inventory   Page 7
Doc No. 40/93/10
5.0 Table 4: Road Inventory Information
   Inventory Group Information                               Location Information                                  Attribute Information                                Data Collection & Update
                                                  Location               Min                                                       Min                    Existing ROMIS                Data
Inventory Group Inventory Type                                                          Tolerance Attributes                                    Tolerance                                          Update
                                                  Attributes             Record                                                    Change                 Attribute (7)                 Source (6)
A logical grouping of   A physical or a logical   IRIS network           Minimum        Measurement A defined data item in IRIS.   Minimum       Measurement Attribute currently exists Source of        Who is
road Inventorys         road Inventory such       attributes which       Record of      accuracy of A Inventory Type has many      Change to accuracy of in ROMIS and is to be data or                   responsible
which are either        as a culvert, median      define location of     Inventory      location    Attributes. (4)                attribute     individual  updated in ROMIS until Collector of         for data
related to each other   or electoral boundary.    Inventory Type. (2)    Type           attributes                                 required to attribute     IRIS goes live.            data if          update
or have similar                                                          triggering a                                              trigger a new                                        different from
properties.                                                              new record                                                record to be                                         Update.
                                                                         to be                                                     created. (5)
                                                  Shading indicates      created. (3)                Shading indicates Attribute
                                                  Inventory Type                                     required to be verified in-
                                                  location to be                                     field 12 months after IRIS
                                                  verified in-field 12                               goes live.
                                                  months after IRIS
                                                  goes live


IMPORTANT NOTES: ALL Attributes Must be updated for New Works
                        ALL Attributes(indicated by shading) Must be Field Verified for all Existing Inventory
(1) Latest Version of IRIS Road Inventory. See Change Log Sheet for detailed list of changes to attributes
(2) All inventory is located by Road No. and Carriageway Indicator (L/R/S)
    A shaded field in this column indicates that the location attributes of the Inventory Type are to be collected
   XSP - Cross sectional position eg L / R / U / Lane No. = Left / Right / Unknown / L1
   Latitude & Longitude - Spatial measurements (Northing & Easting measurements will need conversion to lat & long)
(3) For a new record to be created the attribute must change by greater than the Min Change and for a value greater than the Min Record.
     ALL - All instances of Inventory Type to be recorded, TNC Contract - Refer to TNC Contract, 100m - Record Lengths > 100m,
    500m2 - Record Areas > 500m2, >50% Lane Width- Record lane widths >50%
(4) # indicates common primary key for heirarchical inventory types
    A shaded field in this column indicate an individual attribute requires field verification
(5) Domain List means the attribute has a Domain List. If the attribute changes Domain List value, a change must be initiated.
    Nom means nominal value
(6) Where data is to be collected and the source. M indicates State Road Network, L indicates Local Road Network, M&L indicates State and Local Road Network
    Source: MRWA - Main Roads WA, LGA - Local Government Authorities, Cat 1-3 - Category 1-3 contractors,
             TNC- Term Network Contractor, TCIC - Traffic Control Infrastructure Contractor
(7) A named Italic field in this column indicate an existing ROMIS attribute

MAIN ROADS Western Australia                 Inventory Representation Catalogue – Road Inventory                        Page 8
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   Inventory Group Information                        Location Information                                    Attribute Information                         Data Collection & Update
                                           Location                Min                                                       Min                     Existing ROMIS     Data
Inventory Group Inventory Type                                                     Tolerance Attributes                                    Tolerance                              Update
                                           Attributes              Record                                                    Change                  Attribute          Source
                                                                ALL < 3m
Drainage              Culvert              SLK Position         clear span         10m          Culvert No.                                         Bridge Nr           Cat 1-3   TNC
                                           Note all culvert     excluding
                                           locations <3m Clear bed log
                                                                                                Culvert Type                 Domain List            Culvert Type        TNC
                                           Span to be verified
                                           (Note: Clear Span is                                 Material                     Domain List            Material            M
                                           individual pipe or                                   Crossing Name                                       Crossing Name
                                           box size)                                            Date Constructed                                    Date Constructed
                                                                                                Number of Barrels                                   Number of Barrels
                                                                                                Barrel Length                              0.2m     Barrel Length
                                                                                                Skew                                       5deg     Skew
                                                                                                Horizontal Size                            0.01m    Horizontal Size
                                                                                                Vertical Size                              0.01m    Vertical Size
                                                                                                Diameter                                   0.01m    Diameter
                                                                                                Owner                        Domain List            Owner 1 Owner 2
                                                                                                Drawing Number                                      Drawing Number
                                                                                                Comment                                             Comment
                      Floodway             SLK Position            ALL             10m          Floodway Type                Domain List            Floodway Type       Cat 1-3   TNC
                                                                                                Floodway Length              10m         10m        Floodway Length     TNC
                                                                                                Description                                         Description         M
                      Drainage Outfall     SLK Position            ALL             10m          Description #                                                           Cat 1-3   MRWA
                                           Latitude                                20m          Offset                                                                  M
                                           Longitude                               20m          Date Installed
                                                                                                                                                                        Cat 1-3
                           Drainage Section SLK Start/End          100m            10m          Description                                                             M         MRWA




MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory                       Page 9
Doc No. 40/93/10
   Inventory Group Information                         Location Information                                       Attribute Information                          Data Collection & Update
                                              Location              Min                                                         Min                     Existing ROMIS          Data
Inventory Group Inventory Type                                                      Tolerance Attributes                                      Tolerance                                    Update
                                              Attributes            Record                                                      Change                  Attribute               Source
                      Longitudinal Road
                      Line
Traffic Facilities                            SLK Start/End         100m            10m          Longitudinal Road Line Type Domain List                                        Cat 1-3    TNC
                                                                                                 Date of First Installation                                                     TNC
                                                                                                 Glass Bead Type             Domain List                                        M&L
                                                                                                 Edge Line Type              Domain List
                                                                                                 Raised Pavement Marker
                      Sign
                                              SLK Position - M      All Signs on                 Asset No.
                                              only                  State Roads SLK 10m          (where applicable)                                                             Cat 1-3    TNC
                                              XSP (L/R/M/O) -M      Reg. Signs -
                      State Roads -           only                  on Local
                      SLK + XSP +                                   Roads
                      Lat + Long                                                                 Date Approved                                           Date Approved          TNC
                      Local Roads -           Latitude - M & L                      5m           Date Installed                                          Date Installed         M&L
                      Lat + Long only         Longitude - M & L                     5m
                                 Sign Panel                                                      Design No.                     Domain List                                     Cat 1-3    TNC
                                                                                                 Drawing No.                                                                    TNC
                                                                                                 Service Type                   Domain List                                     M&L
                                                                                                 Back to Back
                                                                                                 Comment
                      Median                  SLK Start/End         100m            10m          Median Type                    Domain List              Median Type            Cat 1-3,TNC TNC
                                                                                                 Median Width                   0.5m        0.1m         Median Width           M
                      Safety Barrier          SLK Start/End         ALL             10m          Barrier Type                   Domain List                                     Cat 1-3     TNC
                                              XSP (L/R/M)                                        Year Installed                                                                 M
                                                                                                                                                         Focal Point Marker
                      Focal Point Marker      SLK Position          ALL             10m          Focal Point Marker Town                                 Town                   TNC        TNC
                                                                                                                                            See TNC
                                                                                                 Focal Point Marker Dist.                   doco (50m) Focal Point Marker Dist. M
                      Kerbing                 SLK Start/End         100m            10m          Kerb Type                      Domain List                                     Cat 1-3    TNC
                                                                                                                                                                                TNC
                                              XSP (L/R)                                          Date Installed                                                                 M
                                                                                                                                                         Pedestrian Crossing
                      Pedestrian Crossing SLK Position              ALL             10m          Pedestrian Crossing Type       Domain List              Type                   Cat 1-3    TNC
                                                                                                 Date Installed                                                                 M
                                                                                                 Signal Type                    Domain List



MAIN ROADS Western Australia               Inventory Representation Catalogue – Road Inventory                        Page 10
Doc No. 40/93/10
   Inventory Group Information                        Location Information                                   Attribute Information                         Data Collection & Update
                                           Location                Min                                                      Min                     Existing ROMIS       Data
Inventory Group Inventory Type                                                     Tolerance Attributes                                   Tolerance                                Update
                                           Attributes              Record                                                   Change                  Attribute            Source
                      Roadside Stopping
Roadside Facilities   Place                SLK Position            ALL             50m          Amenity Type                Domain List            Amenity Type          Cat 1-3   TNC
                                           XSP (L/R)                                            Amenity Description                                Amenity Description   TNC
                                                                                                Bin Present                                        Bin Present           M
                                                                                                Table Present                                      Table Present
                                                                                                BBQ Present                                        BBQ Present
                                                                                                Toilet Present                                     Toilet Present
                                                                                                Water Present                                      Water Present
                                                                                                Telephone Present                                  Telephone Present
                                                                                                Shelter Present                                    Shelter Present
                                                                                                Site Sign Present                                  Site Sign Present
                      Arrester Bed         SLK Position            ALL             10m          Description                                                              Cat 1-3   TNC
                                           XSP (L/R)                                            Date Installed                                                           M




MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory                     Page 11
Doc No. 40/93/10
   Inventory Group Information                         Location Information                                   Attribute Information                          Data Collection & Update
                                            Location                Min                                                     Min                     Existing ROMIS      Data
Inventory Group Inventory Type                                                      Tolerance Attributes                                  Tolerance                               Update
                                            Attributes              Record                                                  Change                  Attribute           Source
Geometry              Horizontal Alignment SLK Start/End            10m             10m          Radius                                   10m      Radius               Cat 1-3   TNC
                                            XSP (L/R/S)                                          Safe Speed                 Domain List 10kph      Safe Speed           M
                                                                                                 Crossfall                                0.50%
                      Vertical Alignment    SLK Start/End           10m             10m          Type                       Domain List            Type                 Cat 1-3   TNC
                                                                                                 Grade                                    0.01%    Grade                M
                                                                                                 K Value                                           K Value
                                                                                                 Sidling                                  1%       Sidling




MAIN ROADS Western Australia               Inventory Representation Catalogue – Road Inventory                    Page 12
Doc No. 40/93/10
   Inventory Group Information                        Location Information                                   Attribute Information                          Data Collection & Update
                                           Location                Min                                                       Min                     Existing ROMIS       Data
Inventory Group Inventory Type                                                     Tolerance Attributes                                    Tolerance                                Update
                                           Attributes              Record                                                    Change                  Attribute            Source
                      Original Traffic
Pavement              Pavement             SLK Start/End           100m            10m          Formation Year                                      Formation Year        Cat 1-3   TNC
                                           * Note: Total                                        Original Traffic Pavement                           Original Pavement
                                           Pavement width to                                    Width *                      0.3m          0.1m     Width                 TNC
                                           be verified not                                      Pavement Year                                       Pavement Year         M
                                           individual                                           Basecourse Material          Domain List            Pavement Type
                                           component widths                                     Basecourse Depth             10mm        5mm        Pavement Depth
                                                                                                Basecourse Agent             Domain List            Pavement Type
                                                                                                Subbase Material             Domain List
                                                                                                Subbase Depth                10mm        5mm
                                                                                                Subbase Agent                Domain List
                                                                                                                                                    Pavement Widening 1
                                                                                                                                                    Width, Pavement
                      Pavement Widening    SLK Start/End           100m            10m          Width *                      0.3m          0.1m     Widening 2 Width      Cat 1-3   TNC
                                                                                                                                                    Pavement Widening 1
                                                                                                                                                    Year, Pavement
                                           XSP (L/R)                                            Pavement Year                                       Widening 2 Year       TNC
                                                                                                                                                    Pavement Widening 1
                                                                                                                                                    Type, Pavement
                                                                                                Basecourse Material          Domain List            Widening 2 Type       M
                                                                                                                                                    Pavement Widening 1
                                                                                                                                                    Depth, Pavement
                                                                                                Basecourse Depth             10mm          5mm      Widening 2 Depth
                                                                                                                                                    Pavement Widening 1
                                                                                                                                                    Type, Pavement
                                                                                                Basecourse Agent             Domain List            Widening 2 Type
                                                                                                Subbase Material             Domain List
                                                                                                Subbase Depth                10mm        5mm
                                                                                                Subbase Agent                Domain List
                                                                                                                                                    Sealed + Unsealed
                      Shoulder Pavement    SLK Start/End           100m            10m          Width *                      0.3m          0.1m     Shoulder Width        Cat 1-3   TNC
                                                                                                                                                    Unsealed Shoulder
                                           XSP (L/R)                                            Pavement Year                                       Year                  TNC
                                                                                                Basecourse Material          Domain List                                  M
                                                                                                Basecourse Depth             10mm        5mm
                                                                                                Basecourse Agent             Domain List

MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory                      Page 13
Doc No. 40/93/10
   Inventory Group Information                      Location Information                                       Attribute Information                         Data Collection & Update
                                         Location                Min                                                         Min                       Existing ROMIS   Data
Inventory Group Inventory Type                                                   Tolerance Attributes                                      Tolerance                              Update
                                         Attributes              Record                                                      Change                    Attribute        Source
                                                                                              Subbase Material               Domain List
                                                                                              Subbase Depth                  10mm        5mm
                                                                                              Subbase Agent                  Domain List
                      Pavement Repair    SLK Start/End           20m             10m          Pavement Repair Year                                                      TNC       TNC
                                         XSP (L/R)               100m2                        Layer                          Domain List                                M
                                                                                              Stabilised
                                                                                                                                                                        Cat 1-3
                                                                                                                                                                        TNC
                      Geotextile         SLK Start/End           100m            10m          Year Installed                                                            M         TNC
                                                                                              Description




MAIN ROADS Western Australia            Inventory Representation Catalogue – Road Inventory                        Page 14
Doc No. 40/93/10
   Inventory Group Information                       Location Information                                   Attribute Information                            Data Collection & Update
                                          Location                Min                                                         Min                     Existing ROMIS          Data
Inventory Group Inventory Type                                                    Tolerance Attributes                                      Tolerance                                   Update
                                          Attributes              Record                                                      Change                  Attribute               Source
Surfacing             Lane Surface        SLK Start/End           100m            10m          Width                          0.2m          0.1m                              Cat 1-3   TNC
                                                                                                                                                     Original Surface Year,
                                                                  >50% Lane                                                                          Reseal 1 Year, Reseal
                                          XSP (Lane No)           width                        Surfacing Year                                        2 Year                 TNC
                                                                                                                                                     Original Surface Type,
                                                                                                                                                     Reseal 1 Type, Reseal
                                                                                               Type                           Domain List            2 Type                 M


                                                                                                                                                     Original Surface
                                                                                                                                                     Aggregate Size, Reseal
                                                                                               Asphalt Depth                  5mm           1mm      1 Size, Reseal 2 Size

                                                                                                                                                     Original Surface
                                                                                                                                                     Aggregate Type, Reseal
                                                                                                                                                     1 Aggregate Type,
                                                                                                                                                     Reseal 2 Aggregate
                                                                                               Aggregate Material             Domain List            Type


                                                                                                                                                     Original Surface
                                                                                                                                                     Aggregate Size, Reseal
                                                                                               Aggregate Size                 Domain List            1 Size, Reseal 2 Size
                                                                                               Adhesion Agent                 Domain List
                                                                                               Binder Type                    Domain List
                                                                                               Binder Modifier                Domain List
                                                                                               Binder Cutback                 Domain List
                                                                                               Bitumen Class                  Domain List
                                                                                               Enrichment Year                                       Enrichment Year
                                                                                                                                                     Sealed Shoulder Width
                      Shoulder Surface    SLK Start/End           100m            10m          Width                          0.2m          0.1m     Left + Right          Cat 1-3      TNC
                                                                                                                                                     Sealed Shoulder Year
                                          XSP (L/R)                                            Surfacing Year                                        Left + Right             TNC
                                                                                                                                                     Sealed Shoulder Type
                                                                                               Type                           Domain List            Left+ Right          M
                                                                                                                                                     Sealed Shoulder Size
                                                                                               Asphalt Depth                  5mm           1mm      Left+ Right
                                                                                                                                                     Sealed Shoulder
                                                                                               Aggregate Material             Domain List            Aggregate Left+ Right

MAIN ROADS Western Australia             Inventory Representation Catalogue – Road Inventory                        Page 15
Doc No. 40/93/10
   Inventory Group Information               Location Information                                   Attribute Information                            Data Collection & Update
                                  Location                Min                                                      Min                       Existing ROMIS         Data
Inventory Group Inventory Type                                            Tolerance Attributes                                   Tolerance                                   Update
                                  Attributes              Record                                                   Change                    Attribute              Source
                                                                                                                                             Sealed Shoulder Size
                                                                                       Aggregate Size              Domain List               Left + Right
                                                                                       Binder Type                 Domain List
                                                                                       Adhesion Agent              Domain List
                                                                                       Binder Modifier             Domain List
                                                                                       Binder Cutback              Domain List
                                                                                       Bitumen Class               Domain List
                                                                                                                                             Shoulder Enrichment
                                                                                       Enrichment Year                                       Year




MAIN ROADS Western Australia     Inventory Representation Catalogue – Road Inventory                     Page 16
Doc No. 40/93/10
   Inventory Group Information                        Location Information                                   Attribute Information                              Data Collection & Update
                                           Location                Min                                                        Min                                              Data
Inventory Group Inventory Type                                                     Tolerance Attributes                                     Tolerance                                     Update
                                           Attributes              Record                                                     Change                                           Source
Environment           Adjacent Material    SLK Start/End                           10m          Adjacent Material             Domain List               Adjacent Material      MRWA & M   MRWA
                      General Terrain      SLK Start/End                           100m         General Terrain               Domain List               General Terrain        MRWA & M   MRWA
                      Grid                 SLK Position            ALL             10m          Grid Type                     Domain List                                      Cat 1-3    MRWA
                                                                                                Description                                             Obstruction Descrip.
                                                                                                Horizontal Clearance          0.2m          0.1m        Horizontal Clearance   M
                      Material Site        SLK Position            ALL             100m         Site Name                                                                      MRWA       MRWA
                                           XSP (L/R)                                            Site Offset                   100m        10m                                  M
                                           Latitude                                             Land Tenure                   Domain List
                                           Longitude                                            Primary Material              Domain List
                                                                                                Material Use                  Domain List
                                                                                                Material Quantity             Domain List
                                                                                                Material Source               Domain List
                      Obstruction          SLK Position                            10m          Obstruction Type              Domain List               Obstruction Type       MRWA       MRWA
                                                                                                Description                                             Description            M
                                                                                                Horizontal Clearance                                    Horizontal Clearance
                                                                                                Vertical Clearance                                      Vertical Clearance
                      Other Feature        SLK Position                            10m          Description                                             Description            MRWA & M   MRWA
                      Wall                 SLK Start/End           100m            10m          Wall Type or Fence            Domain List                                      Cat 1-3    TNC
                                           XSP (L/R)                                            Date Installed                                                                 TNC & M
                      Water Bore           SLK Position                            10m          Bore No.                                                                       MRWA       MRWA
                                           XSP (L/R/U)                                          Bore Name                                                                      M
                                           Latitude                                             Offset (m)                    5m            1m
                                           Longitude                                            File No.
                                                                                                Date Installed
                                                                                                Date Inspected
                                                                                                Inspector
                                                                                                Material                      Domain List
                                                                                                Bore Condition                Domain List
                                                                                                Cap Condition                 Domain List
                                                                                                Concrete Surround             Domain List
                                                                                                Padlock and Key               Domain List
                                                                                                Vegetation Control            Domain List
                                                                                                Access Track                  Domain List
                                                                                                Casing Class                  Domain List
                                                                                                Inner Diam. (mm)              10mm        5mm
                                                                                                Outer Diam. (mm)              10mm        5mm
MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory                       Page 17
Doc No. 40/93/10
   Inventory Group Information               Location Information                                   Attribute Information                  Data Collection & Update
                                  Location                Min                                                         Min                             Data
Inventory Group Inventory Type                                            Tolerance Attributes                                 Tolerance                        Update
                                  Attributes              Record                                                      Change                          Source
                                                                                       Depth (m)                      10m      5m
                                                                                       Pump Test Date
                                                                                       Time (mins)
                                                                                       Flow Rate (kL/h)
                                                                                       Recom. Depth (m)               10m      5m
                                                                                       Water Analysis
                                                                                       Static Table Depth
                                                                                       Comment




MAIN ROADS Western Australia     Inventory Representation Catalogue – Road Inventory                        Page 18
Doc No. 40/93/10
   Inventory Group Information                        Location Information                                  Attribute Information                             Data Collection & Update
                                              Location            Min                                                          Min                     Existing ROMIS      Data
Inventory Group Inventory Type                                                    Tolerance Attributes                                       Tolerance                              Update
                                              Attributes          Record                                                       Change                  Attribute           Source
Railway Crossing &
Line               Railway Crossing           SLK Position        ALL             10m          Crossing Number #                                      Crossing Number      MRWA     MRWA
                                                                                               Crossing Type                   Domain List            Crossing Type        M&L
                                                                                               Protection                      Domain List            Protection
                                                                                               Advanced Flashing
                                                                                               Pedestrian Facility             Domain List
                                                                                               Max Train Speed                 10kph       10kph      Max Train Speed
                                                                                               Date Inspected                                         Date Inspected
                                                                                               In use
                               Railway Line                                                    Line No                         Domain List            Line No              MRWA     MRWA
                                                                                               Line Type                       Domain List            Line Type            M&L
                                                                                               Operator                        Domain List
                                                                                               Line Distance (km)                                     Line Distance (km)
                                                                                               No. of Tracks                                          No. of Tracks
                                                                                               Min. No. of Trains                                     Min. No. of Trains
                                                                                               Max. No. of Trains                                     Max. No. of Trains




MAIN ROADS Western Australia             Inventory Representation Catalogue – Road Inventory                         Page 19
Doc No. 40/93/10
   Inventory Group Information                          Location Information                                     Attribute Information                         Data Collection & Update
                                             Location                Min                                                        Min                     Existing ROMIS        Data
Inventory Group Inventory Type                                                       Tolerance Attributes                                     Tolerance                                  Update
                                             Attributes              Record                                                     Change                  Attribute             Source
Administration        Control of Access      SLK Start/End           ALL             10m          Dwg. Year                                                                   MRWA       MRWA
                                                                                                  Dwg. Office                                                                 M&L
                                                                                                  Dwg. Seq. No.
                                                                                                  Dwg. Amend No.
                                                                                                  Status
                                                                                                  Proc. Date
                                                                                                  Reproc. Date
                                                                                                  Desc.
                                                                                                  File No.
                                                                                                  Comment
                                                                                                  MF Indicator

                      Commonwealth Class SLK Start/End               ALL             10m          Commonwealth Class            Domain List            Commonwealth Class     MRWA M&L MRWA
                      Federal Electorates SLK Start/End              ALL             10m          Federal Electorates           Domain List            Federal Electorates    MRWA M   MRWA
                      State Electoral
                      Districts              SLK Start/End           ALL             10m          State Electoral Districts     Domain List            State Lower House      MRWA M     MRWA
                      State Electoral
                      Regions                SLK Start/End           ALL             10m          State Electoral Regions       Domain List            State Upper House      MRWA M   MRWA
                      Functional Class       SLK Start/End           ALL             10m          Functional Class              Domain List            Functional Class       MRWA M&L MRWA
                      Local Government                                                                                                                 Local Government
                      Boundary               SLK Position            ALL             10m          Local Government Boundary Domain List                Boundary               MRWA M&L   MRWA
                      Responsibility Area    SLK Start/End           ALL             10m          Responsibility Area       Domain List                Responsibility Area    MRWA M     MRWA
                      Regional Boundary      SLK Position            ALL             10m          Regional Boundary         Domain List                Regional Boundary      MRWA M&L   MRWA
                      Road Closure           SLK Start/End           ALL             10m          Closure Type              Domain List                Closure Type           MRWA M&L   MRWA
                                                                                                  Date Closed                                          Date Closed
                                                                                                  Time Closed                                          Time Closed
                                                                                                  Event Type                Domain List
                                                                                                  Closed to All                                        Closed to All
                                                                                                  Closed to Caravans                                   Closed to Caravans
                                                                                                  Closed to Cars/Utes                                  Closed to Cars/Utes
                                                                                                  Closed to 4WD                                        Closed to 4WD
                                                                                                  Closed to Over 3t                                    Closed to Over 3t
                                                                                                  Closed to Road Train                                 Closed to Road Train
                                                                                                  Date Opened                                          Date Opened
                                                                                                  Time Opened                                          Time Opened

MAIN ROADS Western Australia                Inventory Representation Catalogue – Road Inventory                       Page 20
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   Inventory Group Information                        Location Information                                  Attribute Information                        Data Collection & Update
                                           Location                Min                                                     Min                    Existing ROMIS    Data
Inventory Group Inventory Type                                                     Tolerance Attributes                               Tolerance                               Update
                                           Attributes              Record                                                  Change                 Attribute         Source
                                                                                                Cost of Damage                                    Cost of Damage
                                                                                                Survey Book                                       Survey Book
                      Legal Speed Limit    SLK Position            ALL             10m          Speed Limit                Domain List 10kph      Speed Limit       MRWA M&L MRWA




MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory                    Page 21
Doc No. 40/93/10
   Inventory Group Information                      Location Information                                   Attribute Information                            Data Collection & Update
                                         Location                Min                                                         Min                     Existing ROMIS       Data
Inventory Group Inventory Type                                                   Tolerance Attributes                                      Tolerance                                   Update
                                         Attributes              Record                                                      Change                  Attribute            Source
                                                                 Supplied
Roman Inventory       Local Inventory     SLK Start/End          from LG         10m          Cross Section                  Domain List            Cross Section Type    LGA (RoMan) MRWA
                                         LG No.                                               Surface Type                   Domain List            Seal Type             L
                                                                                              Formation Width (m)                                   Formation Width (m)
                                                                                              Pave Width (m)                                        Pave Width (m)
                                                                                              Pave Year                                             Pave Year
                                                                                              Surface Width (m)                                     Seal Width (m)
                                                                                              Orig. Surface Year                                    Seal Year
                                                                                              Latest Reseal Type             Domain List            Reseal Type
                                                                                              Reseal Year 1                                         Reseal Year 1
                                                                                              Reseal Year 2                                         Reseal Year 2
                                                                                              Surface Treatment              Domain List            Treatment Type
                                                                                              Treatment Year                                        Treatment Year
                                                                                              Drainage Left                  Domain List            Drainage Left
                                                                                              Drainage Right                 Domain List            Drainage Right
                                                                                              Speed Limit                                           Speed Limit
                                                                                              Road Hierarchy Code            Domain List            Road Hierarchy
                                                                                              Traffic Count                                         Traffic Count
                                                                                              Traffic Year                                          Traffic Count Year
                                                                                              General Terrain                Domain List            General Terrain
                                                                 Supplied
                      Local Path Summary SLK Start/End           from LG         10m          LG                             Domain List                                  LGA (RoMan) MRWA
                                         LG No.                                               Path Type                      Domain List                                  L
                                                                                              Length Of POP - Road (m)
                                                                                              Length Of POP - Other (m)
                                                                                              Length Of DUP - Road (m)
                                                                                              Length Of DUP - Other (m)
                                                                                              Area Of POP - Road (m2)
                                                                                              Area Of POP - Other (m2)
                                                                                              Area Of DUP - Road (m2)
                                                                                              Area Of DUP - Other (m2)
                      LG Grants                                  Supplied by                                                                                                WA Local
                      Commission         SLK Start/End           MRWA        10m              Built Up Area Type             Domain List            Built Up Area Indicator Government MRWA
                                                                                                                                                                          Grants
                                         LG No.                                               Road Accountability            Domain List            Road Accountability   Commission
                                                                                              Funding Factor                 Domain List            LG Funding Factor

MAIN ROADS Western Australia            Inventory Representation Catalogue – Road Inventory                        Page 22
Doc No. 40/93/10
Inventory Type
Description                    A physical or a logical road Inventory such as a culvert, median or
                               electoral boundary.

Inventory Group                Inventory Group

IRIS Location                  Road No.
Referencing                    Carriageway Indicator (L/R/S)
                               XSP
                               SLK Position
                               Start SLK
                               End SLK
                               Latitude
                               Longitude

Attribute List                 List of attributes

Reference                      Eg Main Roads WA Road and Traffic Engineering Guidelines


Physical Model                 Drawings, Photographs etc


Logical Model                  Diagram with data attributes listed, used for complex Inventory types
                               such as pavement and surfacing details




MAIN ROADS Western Australia               Inventory Representation Catalogue – Road Inventory   Page 23
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6.0 Inventory Type Attributes
Attribute 1                    Description


Attribute 2                    Description

Attribute 3                    Description


Attribute 4                    Description

Attribute 5                    Description


Attribute 6                    Description

Attribute 7                    Description


Attribute 8                    Description

Attribute 9                    Description


Attribute 10                   Description

Attribute 11                   Description




MAIN ROADS Western Australia                 Inventory Representation Catalogue – Road Inventory   Page 24
Doc No. 40/93/10
7.0 Inventory Type Domain Lists
Attribute Domain
List
Attribute Domain
List
Attribute Domain
List
Attribute Domain
List




MAIN ROADS Western Australia   Inventory Representation Catalogue – Road Inventory   Page 25
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8.0 General Guidelines for Collecting & Updating Road
Inventory Information

These guidelines apply to all Road Inventory unless otherwise stated.

Data Collection                Either Term Network Contractor or Main Roads Western Australia
Responsibility

Data Source and                Sourced primarily from as-constructed documentation (drawings,
Format                         spray sheets and schedules etc)

                               Some attributes such as widths and surface type may be verified
                               from field-checking existing roads. Eg aggregate types

Data Attributes to             Collect data listed in Table 1 of each section. Collect Data for the
Collect                        State Road Network and/or the Local Road Network as indicated.

When to Collect                Collect and update Inventory Type details for any roadworks that
& Update                       adds, removes or modifies an attribute greater than the min record
Inventory Type                 and min change values.
Data
                               Inventory Type data may be collected for sections smaller than the
                               min record where required eg intersection treatments.

                               Update Inventory Type data within 4 weeks of practical completion
                               of the roadworks. See IRIS Inventory Update Manual (40/93/11) for
                               further details.

                               Note: A Network Control System or Primary Reference Point
                               change process may be necessary with some roadworks such as
                               construction, or realignment. See the Network Referencing
                               Catalogue (40/93/08) and IRIS Inventory Update Manual
                               (40/93/10) for details.

Network                        All on-road inventory data is referenced by a road number and
Referencing                    carriageway indicator. Data may also be referenced across the
Guidelines                     carriageway by XSP.


Measuring                      Record all Inventory Type details with a start and end SLK or SLK
Location                       position measured to the nearest 10m.

                               Record location in Latitude and Longitude in GDA94.

                               Measure location of start and end SLK or SLK position by
                               referencing from a Node or Primary Reference Point. See Network
                               Referencing Catalogue for details.

Network                        The Network Referencing Catalogue contains a detailed
Measurement                    description of measuring the start and end positions of traffic
Guidelines                     management facilities such as turning pockets and overtaking lanes.


MAIN ROADS Western Australia              Inventory Representation Catalogue – Road Inventory   Page 26
Doc No. 40/93/10
Work Types                     The following general categories of work types have been adopted.
                               Broad definitions and examples are illustrated in the Pavement &
                               Surfacing Section.

                               The work types are as follows:

                                  Construction
                                  Reconstruction
                                  Realignment
                                  Overlay
                                  Widening
                                  Shoulder Widening
                                  Pavement Repair
                                  Enrichment
                                  Lane Seal / Reseal
                                  Shoulder Seal




MAIN ROADS Western Australia             Inventory Representation Catalogue – Road Inventory   Page 27
Doc No. 40/93/10

				
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