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To: Paul Olson, FHWA
From: Christina Andrews
Date: July 16, 2003
Subject: Interim Results - Agency Signal Timing Sheet Analysis for Signals Workshop
The purpose of this memo is to summarize interim progress on analyzing traffic signal controller timing
pages in support of your Signals Workshop next week, July 22-23, 2003.
All timing sheet files that had been posted to the FHWA FTP site you provided were retrieved. Table 1 on
the following page summarizes the files. Note that the last item in the list, for the City of Mesa, is actually
several word document files that together represent the configuration for one intersection. Several of the
files were duplicates (e.g., the 2070/TSCP 2.xx sites). One file (#8 in the table) appears to be for a pre-
timed controller and was removed from the analysis. A second (#31 in the table) appears to be from a
stage-based controller, possibly SCATS, and was also removed for purposes of this analysis. The results
are fairly complete configurations for 29 intersections.
The following documents were reviewed in preparation for working on this task:
NEMA TS 2 – Traffic Controller Assemblies with NTCIP Requirements
NTCIP 1201 v02.26
NTCIP 1202 v02.17,
Actuated Signal Controller Core Functions (Proposed), Battelle
Numerous signal controller user’s manuals, including BiTran 233, Eagle EPAC 300, TRANSYT 1880EL,
and WAPITI W4IKS
Based on the review of all the documents mentioned above and in Table 1, a list of common parameter
names has been drafted. The controller configuration parameters can very generally be grouped as
follows:
• Unit Configuration
• Basic Phase Timing and Functions
• Overlap Configuration
• Coordination
• Detectors
• Time-of-Day Programming
• Preemption
• Reporting Configuration (to a central control system)
Table 2 is a partial proposed list of some of the common parameters. The term ‘common’ was applied to
any parameter that appeared in the timing sheets for more than one type of controller. Other parameters
that appeared to be unique to a particular type of controller but with an apparent function have also been
included and associated with the controller by name. Some obscure features of some controllers, whose
functions are not apparent, have not been included.
Memorandum
This list of parameters is not yet complete. It covers only the first four groups identified above. This list
will be updated as work on the project continues.
Using the common parameter names an Excel file was developed to contain a ‘database’ of the
intersection configurations to record what parameters are actually used at a particular site. This database
currently contains 29 records with fields for the first four groups of parameters identified above. An
electronic copy of the file is attached to this memo. Table 3 is a summary of the frequency with which
these parameters are used in this small sample. Only 18 parameters are used a minimum of 90% of the
time; however, the sample is very small. Several of those that are used 100% of the time are implicitly set
or determined by the firmware or otherwise not really configured by the signal operator.
We discussed briefly the possibility of supplementing the intersection database with information from
MIST systems with signal control. Many MIST systems have been deployed with various signal
controllers. MIST can maintain copies of the intersection configuration parameters, but the data is
stored as a binary image in the MIST database. It is not in a format that can be easily converted to a
record that would fit into the common parameter usage database. However, a small utility program can
be created to process the binary image data and create the records we want. The utility would be specific
for a particular controller model, since the format for the controller’s image is unique to it.
The process to synthesize what features are being used in the timing sheets from these 29 intersections
has been tedious, requiring a visual inspection of hard copy pages and manually entering data into the
‘usage’ database. Developing utilities to process electronic versions of the controllers configuration
parameters can increase the size of the usage database in a fraction of the time. The visual inspection to
create one record in the usage database has taken about one hour per intersection, and the records are
not yet complete. One of our largest MIST signal control systems consists of upwards of 1000 BiTran
233 version 2 controllers. As a rough, ballpark estimate I think a utility to process those configurations
would require 100-150 hours to develop. If a larger sample for the usage database is desired, I would
suggest a modification to this task order to create a utility for BiTran 233 version 2 to add records based
on the MIST system mentioned above. The new data can help determine whether the development of
other similar utilities for other controllers in other MIST systems might also be useful.
We will continue to develop the list of common parameter names and update the intersection database
with additional fields. In support of the Workshop July 22-23 we will provide updated files Friday July 18
or Monday July 21, at your discretion. While the database is not expected to be completed by then, what
is available will hopefully be of use.
Memorandum
Table 1. Summary of Agency Timing Pages
Agency Location Firmware
1 1 (?) 3500 South @ 2200 West Econolite/ASC2
2 1 (?) Bangerter Hwy @ 5400 South Econolite/ASC2
3 City of Omaha 156th St @ Q St Wapiti W4IKS (?)
4 City of Omaha 78th ST @ Maple St Wapiti W4IKS (?)
5 City of Omaha 84th St @ F St Wapiti W4IKS (?)
6 City of Omaha 114th St @ Davenport St Wapiti W4IKS (?)
7 City of Omaha 132nd St @ F St Wapiti W4IKS (?)
8 Washington, D.C. Department of Public Works None; Blank Timing Plan Schedule Sheet (?) Possibly BiTran; pretimed
9 Washington, D.C. Department of Public Works North Capitol St @ Gallatin St, NW (?) Possibly BiTran 210
10 1 (?) I-15 SB Ramp @ 1300 South Econolite/ASC2
11 City of Los Angeles Department of Transportation Alhambra Ave @ Valley Blvd 2070/TSCP 2.xx
12 City of Los Angeles Department of Transportation Chase St @ Topanga Canyon Blvd 2070/TSCP 2.xx
13 City of Los Angeles Department of Transportation Partmenia St @ Topanga Canyon Blvd 2070/TSCP 2.xx
14 City of Los Angeles Department of Transportation Sepulveda Blvd @ Wolshire Blvd 2070/TSCP 2.xx
15 City of Los Angeles Department of Transportation 6th St @ Burlington Ave 2070/TSCP 2.xx
16 City of Los Angeles Department of Transportation Clinton St @ Crescent Heights Blvd 2070/TSCP 2.xx
17 2 (?) Lake Ridge Transyt 1880 EL
18 City of Los Angeles Department of Transportation 6th St @ Burlington Ave 2070/TSCP 2.xx
19 City of Los Angeles Department of Transportation Alhambra Ave @ Valley Blvd 2070/TSCP 2.xx
20 City of Los Angeles Department of Transportation Chase St @ Topanga Canyon Blvd 2070/TSCP 2.xx
21 City of Los Angeles Department of Transportation Partmenia St @ Topanga Canyon Blvd 2070/TSCP 2.xx
22 City of Los Angeles Department of Transportation Sepulveda Blvd @ Wolshire Blvd 2070/TSCP 2.xx
23 City of Los Angeles Department of Transportation 6th St @ Burlington Ave 2070/TSCP 2.xx
24 City of Los Angeles Department of Transportation Clinton St @ Crescent Heights Blvd 2070/TSCP 2.xx
25 3 (?) US 40 @ DE 72 (Deleware?) Eagle EPAC 300 (?)
26 3 (?) US 40 @ Walther Rd Eagle EPAC 300 (?)
27 Monroe County Department of Transportation Lake/State @ Lyell/Bausch/Smith Econolite/ASC 2100
28 Monroe County Department of Transportation Main @ Gibbs Econolite/ASC 2100
29 4 (?) Morrow Rd @ Holiday Blvd/Ash St Eagle EPAC 300 (?)
30 4 (?) Morrow Rd @ Lake Harbin Transyt 1880 EL
31 5 (?) DE 2 @ DE 7 (Deleware) (?) Possibly SCATS
Road Commission for Oakland Count, Waterford,
32 MI Auburn Mile Mall E Dr @ Brown Rd Eagle EPAC 300
Road Commission for Oakland Count, Waterford,
33 MI Auburn Mile Mall E Dr @ Brown Rd Eagle EPAC 300
Road Commission for Oakland Count, Waterford,
34 MI Dequindre @ Runyon/25 Mile Rd Eagle EPAC 300
35 6 (?) Old Dixie @ Aviation Blvd BI Tran 233
36 6 (?) Tara Blvd @ Upper Riverdale Rd BI Tran 233
37 1 (?) State St @ 300 South Econolite/ASC2
38 City of Scottsdale Traffic Engineering Division Scottsdale @ Shea Wapiti W4IKS (?)
39 City of Mesa Traffic Signals Not Specified Econolite/ASC2
NOTE: Agencies identified by number and (?) could not otherwise be identified. Those with the same designation appear to be from
the same agency.
Memorandum
Table 2. Proposed Common Controller Parameter Names
Controller Model Parameter Group Per Parameter Name
Common Unit Configuration Unit Max Phase Tables
Common Unit Configuration Unit Max Phases
Common Unit Configuration Unit Max Rings
Common Unit Configuration Unit Max Sequences
Common Unit Configuration Unit Max Overlaps
Common Unit Configuration Unit Max Coordination Plans
Common Unit Configuration Unit Startup Flash Time
Common Unit Configuration Unit Startup All Red Time
Common Unit Configuration Unit Auto Pedestrian Clear
Common Unit Configuration Unit Minimum Red Revert Time
Transyt 1880EL Unit Configuration Unit Exclusive Ped Walk
Transyt 1880EL Unit Configuration Unit Exclusive Ped Pedestrian Clearance
Transyt 1880EL Unit Configuration Unit Exclusive Ped Red Clearance
Common Ring Configuration Sequence Ring Number
Common Ring Configuration Sequence Ring Phase Sequence
Common Phase Timing Phase Walk
Common Phase Timing Phase Alternate Walk
BiTran Phase Timing Phase Advance Walk Time
BiTran Phase Timing Phase Delay Walk Time
Common Phase Timing Phase Pedestrian Clearance
Common Phase Timing Phase Alternate Pedestrian Clearance
Common Phase Timing Phase Min Green
Common Phase Timing Phase Alternate Min Green
Common Phase Timing Phase Passage
Common Phase Timing Phase Alternate Passage
Common Phase Timing Phase Maximum 1
Common Phase Timing Phase Maximum 2
Common Phase Timing Phase Maximum 3
Common Phase Timing Phase Yellow Change
Common Phase Timing Phase Red Clearance
Common Phase Timing Phase Red Revert
Common Phase Timing Phase Added Initial
Common Phase Timing Phase Maximum Initial
Common Phase Timing Phase Time Before Reduction
Common Phase Timing Phase Cars Before Reduction
Common Phase Timing Phase Time to Reduce
Common Phase Timing Phase Reduce By
Common Phase Timing Phase Reduce Every
Common Phase Timing Phase Minimum Gap
Common Phase Timing Phase Maximum Gap
Common Phase Timing Phase Type (Max) 3 Limit
Transyt 1880EL Phase Timing Phase Max 3 Adjustment
Memorandum
Table 2. Proposed Common Controller Parameter Names
Controller Model Parameter Group Per Parameter Name
Transyt 1880EL Phase Timing Phase Max 3 Set (max outs)
Transyt 1880EL Phase Timing Phase Max 3 Clear (gap outs)
Common Phase Function Phase Enabled
Common Phase Function Phase Is Pedestrian Phase
Common Phase Function Phase Remote Flash Entry Phase
Common Phase Function Phase Remote Flash Exit Phase
Common Phase Function Phase Remote Flash Phase
Common Phase Function Phase Remote Flash Yellow Phase
Common Phase Function Phase Call to Nonactuated Mode I
Common Phase Function Phase Call to Nonactuated Mode II
Common Phase Function Phase Yellow Lock
Common Phase Function Phase Red Lock
Common Phase Function Phase Non-lock Detector Memory
Common Phase Function Phase Minimum Recall
Common Phase Function Phase Maximum Recall
Common Phase Function Phase Pedestrian Recall
Common Phase Function Phase Soft Recall
BiTran Phase Function Phase External Recall
BiTran Phase Function Phase Manual Control Recall
Common Phase Function Phase Dual Entry
Common Phase Function Phase Simultaneous Gap Out
Common Phase Function Phase Guaranteed Passage
Common Phase Function Phase Rest in Walk
Common Phase Function Phase Conditional Service
Econolite ASC Phase Function Phase Conditional Reservice
Common Phase Function Phase Density Enabled
Common Phase Function Phase Red Rest
Common Phase Function Phase Flash Walk
Common Phase Function Phase Flash Green
BiTran Phase Function Phase Fast Flash Green
Common Phase Function Phase Advance Walk
BiTran Phase Function Phase Delay Walk
Common Phase Function Phase Pedestrian Clearance through Yellow
Common Phase Function Phase Pedestrian Clearance through Red
Common Phase Startup and Sequence Phase Ring
Common Phase Startup and Sequence Phase Ring Sequence Number
Common Phase Startup and Sequence Phase Concurrency
Common Phase Startup and Sequence Phase Startup Interval
Common Phase Startup and Sequence Phase Exclusive Ped Phase
Common Phase Startup and Sequence Phase Exclusive Phase
Common Phase Startup and Sequence Phase Restricted Phase
Common Phase Startup and Sequence Phase Phase Omit
Common Phase Startup and Sequence Phase Phase Omit by Phases
Memorandum
Table 2. Proposed Common Controller Parameter Names
Controller Model Parameter Group Per Parameter Name
EPAC300 Phase Startup and Sequence Phase Phase Omit Yellow by Phases Yellow
Common Dimming Channel Dim Green/Walk
Common Dimming Channel Dim Yelllow Change/Pedestrian Clearance
Common Dimming Channel Dim Red Clearance/ Pedestrian Clearance
Common Overlap Function Overlap Overlap Phases
Common Overlap Function Overlap Minus Phases
Common Overlap Function Overlap Minus Pedestrian Phases
Common Overlap Function Overlap Plus Phases
BiTran Overlap Function Overlap Omit Overlap Green Phases
Common Overlap Timing Overlap Overlap Green
Common Overlap Timing Overlap Overlap Yellow Change
Common Overlap Timing Overlap Overlap Red Clearance
Common Coordination Configuration Unit Interconnect Type
Common Coordination Configuration Unit Transition Type
Common Coordination Configuration Unit Split Units
Common Coordination Configuration Unit Offset Units
Common Coordination Configuration Unit Max Dwell
Common Coordination Configuration Unit Inhibit Max
Common Coordination Configuration Unit Maximum II Selection
Common Coordination Configuration Unit Offset Reference
Common Coordination Plan Plan Plan Number
Common Coordination Plan Plan Cycle Length
Common Coordination Plan Plan Offset
Common Coordination Plan Plan Phase Splits
Common Coordination Plan Plan Phase ForceOffs
Common Coordination Plan Plan Permissive 1 Length
Common Coordination Plan Plan Permissive 2 Length
Common Coordination Plan Plan Permissive 2 Start Time
Common Coordination Plan Plan Permissive 2 End Time
Common Coordination Plan Plan Permissive 3 Start Time
Common Coordination Plan Plan Permissive 3 End Time
Common Coordination Plan Plan Coordination Phases
Common Coordination Plan Plan Permissive 1 Phases
Common Coordination Plan Plan Permissive 2 Phases
Common Coordination Plan Plan Permissive 3 Phases
Common Coordination Plan Plan Coordination Plan Min Recall Phases
Common Coordination Plan Plan Coordination Plan Max Recall Phases
Common Coordination Plan Plan Coordination Plan Ped Recall Phases
Common Coordination Plan Plan Coordination Plan Phase Omit Phases
Common Coordination Plan Plan Coordination Plan Reservice Phases
Common Coordination Plan Plan Coordination Plan Sequence Number
Common Coordination Plan Plan Plan Max Dwell
Memorandum
Table 3. Controller Parameter Usage
Controller Model Parameter Group Per Parameter Name Usage
Common Unit Configuration Unit Max Phase Tables 100%
Common Unit Configuration Unit Max Phases 100%
Common Unit Configuration Unit Max Rings 100%
Common Unit Configuration Unit Max Sequences 100%
Common Ring Configuration Sequence Ring Number 100%
Common Ring Configuration Sequence Ring Phase Sequence 100%
Common Phase Timing Phase Min Green 100%
Common Phase Timing Phase Maximum 1 100%
Common Phase Timing Phase Yellow Change 100%
Common Phase Startup and Sequence Phase Ring 100%
Common Phase Startup and Sequence Phase Ring Sequence Number 100%
Common Phase Startup and Sequence Phase Concurrency 100%
Common Unit Configuration Unit Max Overlaps 97%
Common Phase Timing Phase Passage 97%
Common Phase Timing Phase Red Clearance 97%
Common Phase Startup and Sequence Phase Startup Interval 97%
Common Unit Configuration Unit Max Coordination Plans 93%
Common Phase Timing Phase Walk 90%
Common Coordination Plan Plan Plan Number 86%
Common Coordination Plan Plan Cycle Length 86%
Common Coordination Plan Plan Offset 86%
Common Coordination Plan Plan Coordination Phases 86%
Common Coordination Plan Plan Coordination Plan Sequence Number 86%
Common Phase Timing Phase Pedestrian Clearance 83%
Common Phase Timing Phase Maximum 2 76%
Common Phase Function Phase Enabled 69%
Common Phase Function Phase Dual Entry 62%
Common Phase Function Phase Minimum Recall 59%
Common Unit Configuration Unit Startup All Red Time 48%
Common Coordination Configuration Unit Transition Type 48%
Common Coordination Plan Plan Phase ForceOffs 48%
Common Phase Function Phase Pedestrian Recall 45%
Common Phase Function Phase Call to Nonactuated Mode I 41%
Common Coordination Configuration Unit Interconnect Type 41%
Common Coordination Configuration Unit Inhibit Max 41%
Common Phase Timing Phase Maximum Initial 38%
Common Phase Timing Phase Minimum Gap 38%
Common Coordination Plan Plan Phase Splits 38%
Common Unit Configuration Unit Minimum Red Revert Time 34%
Common Phase Timing Phase Red Revert 31%
Common Coordination Plan Plan Coordination Plan Max Recall Phases 31%
Common Phase Timing Phase Added Initial 28%
Common Phase Function Phase Remote Flash Entry Phase 28%
Memorandum
Table 3. Controller Parameter Usage
Controller Model Parameter Group Per Parameter Name Usage
Common Phase Function Phase Remote Flash Exit Phase 28%
Common Phase Function Phase Maximum Recall 28%
Common Overlap Function Overlap Overlap Phases 28%
Common Coordination Configuration Unit Max Dwell 28%
Common Phase Function Phase Yellow Lock 24%
Common Phase Function Phase Rest in Walk 24%
Common Coordination Configuration Unit Split Units 24%
Common Coordination Configuration Unit Offset Units 24%
Common Coordination Plan Plan Plan Max Dwell 24%
Common Phase Timing Phase Time Before Reduction 21%
Common Phase Timing Phase Time to Reduce 21%
Common Phase Function Phase Is Pedestrian Phase 21%
Common Phase Function Phase Remote Flash Phase 21%
Common Coordination Plan Plan Permissive 1 Length 21%
Common Unit Configuration Unit Startup Flash Time 17%
Common Phase Timing Phase Reduce Every 17%
Common Phase Timing Phase Maximum Gap 17%
Common Phase Function Phase Call to Nonactuated Mode II 17%
Common Phase Function Phase Red Lock 17%
Common Coordination Plan Plan Coordination Plan Ped Recall Phases 17%
Common Phase Timing Phase Maximum 3 14%
Common Phase Function Phase Non-lock Detector Memory 14%
Common Phase Function Phase Guaranteed Passage 14%
Common Coordination Configuration Unit Offset Reference 14%
Common Coordination Plan Plan Permissive 1 Phases 14%
Common Phase Timing Phase Reduce By 10%
Common Overlap Timing Overlap Overlap Yellow Change 10%
Common Coordination Plan Plan Permissive 2 Start Time 10%
Common Coordination Plan Plan Permissive 2 End Time 10%
Common Coordination Plan Plan Permissive 3 Start Time 10%
Common Coordination Plan Plan Permissive 3 End Time 10%
Common Phase Timing Phase Type (Max) 3 Limit 7%
Common Phase Function Phase Remote Flash Yellow Phase 7%
Common Phase Function Phase Simultaneous Gap Out 7%
Common Phase Function Phase Density Enabled 7%
Common Phase Function Phase Pedestrian Clearance through Red 7%
Common Phase Startup and Sequence Phase Restricted Phase 7%
Common Overlap Timing Overlap Overlap Green 7%
Common Overlap Timing Overlap Overlap Red Clearance 7%
BiTran Phase Timing Phase Delay Walk Time 3%
Common Phase Timing Phase Alternate Pedestrian Clearance 3%
Common Phase Function Phase Soft Recall 3%
Common Phase Function Phase Conditional Service 3%
Memorandum
Table 3. Controller Parameter Usage
Controller Model Parameter Group Per Parameter Name Usage
Common Phase Function Phase Red Rest 3%
Common Phase Function Phase Flash Walk 3%
Common Phase Startup and Sequence Phase Phase Omit 3%
Common Coordination Plan Plan Permissive 2 Phases 3%
Common Coordination Plan Plan Permissive 3 Phases 3%
Common Coordination Plan Plan Coordination Plan Min Recall Phases 3%
Common Coordination Plan Plan Coordination Plan Phase Omit Phases 3%
Common Unit Configuration Unit Auto Pedestrian Clear 0%
Transyt 1880EL Unit Configuration Unit Exclusive Ped Walk 0%
Transyt 1880EL Unit Configuration Unit Exclusive Ped Pedestrian Clearance 0%
Transyt 1880EL Unit Configuration Unit Exclusive Ped Red Clearance 0%
Common Phase Timing Phase Alternate Walk 0%
BiTran Phase Timing Phase Advance Walk Time 0%
Common Phase Timing Phase Alternate Min Green 0%
Common Phase Timing Phase Alternate Passage 0%
Common Phase Timing Phase Cars Before Reduction 0%
Transyt 1880EL Phase Timing Phase Max 3 Adjustment 0%
Transyt 1880EL Phase Timing Phase Max 3 Set (max outs) 0%
Transyt 1880EL Phase Timing Phase Max 3 Clear (gap outs) 0%
BiTran Phase Function Phase External Recall 0%
BiTran Phase Function Phase Manual Control Recall 0%
Econolite ASC Phase Function Phase Conditional Reservice 0%
Common Phase Function Phase Flash Green 0%
BiTran Phase Function Phase Fast Flash Green 0%
Common Phase Function Phase Advance Walk 0%
BiTran Phase Function Phase Delay Walk 0%
Common Phase Function Phase Pedestrian Clearance through Yellow 0%
Common Phase Startup and Sequence Phase Exclusive Ped Phase 0%
Common Phase Startup and Sequence Phase Exclusive Phase 0%
Common Phase Startup and Sequence Phase Phase Omit by Phases 0%
EPAC300 Phase Startup and Sequence Phase Phase Omit Yellow by Phases Yellow 0%
Common Dimming Channel Dim Green/Walk 0%
Common Dimming Channel Dim Yelllow Change/Pedestrian Clearance 0%
Common Dimming Channel Dim Red Clearance/ Pedestrian Clearance 0%
Common Overlap Function Overlap Minus Phases 0%
Common Overlap Function Overlap Minus Pedestrian Phases 0%
Common Overlap Function Overlap Plus Phases 0%
BiTran Overlap Function Overlap Omit Overlap Green Phases 0%
Common Coordination Configuration Unit Maximum II Selection 0%
Common Coordination Plan Plan Permissive 2 Length 0%
Common Coordination Plan Plan Coordination Plan Reservice Phases 0%
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