Traffic Software Integrated
System - Corridor Simulation
TSIS is an integrated development
environment that enables users to conduct
traffic operations analysis. Built using a
component architecture, TSIS is a toolbox
that contains tools that allow the user to
define and manage traffic analysis
projects, define traffic networks and
create inputs for traffic simulation analysis,
execute traffic simulation models, and
interpret the results of those models.
Capabilities of TSIS-CORSIM
Land use traffic impact studies and access management studies
Freeway and surface street interchanges
Signal timing, coordination, and pre-emption
Freeway weaving sections, lane adds and lane drops
Bus stations, bus routes, carpools and taxis
Ramp metering and HOV lanes
Unsignalized intersections and signal warrants
Incident detection and management
Queuing studies involving turn pockets and queue blockage
Toll plazas and truck weigh stations
Origin-destination traffic flow patterns
Verification and validation of other software
Surrogate for field data collection
Funded by the Federal Highway
Administration (FHWA) throughout the last
three decades, TSIS has evolved into a
benchmark within the transportation
profession. It has facilitated greater
understanding of traffic flow theory, while
continuing to improve traffic operations as a
result of its verification and validation of
TSIS 6.0 is targeted for 2007.
In February 2003, version 5.1 was released as a free update, and was
shipped automatically to all registered users of version 5.0.
TSIS 5.1 now features a new GUI-based traffic network and simulation
input editor known as TRAFED. Also, electronic documentation is now
provided in HTML format for all TSIS components. This allows
placement of the written Users Guides on-line, without having to
modify the original documents. The HTML help system uses the
Internet browser to provide a powerful, flexible, hypertext-based help
TShell Program Manager
CORSIM Microscopic Traffic Simulation Model
TRAFVU Animation and Graphics Module
TRAFED Graphical Input Editor
Microscopic Traffic Simulation Model
CORSIM includes both NETSIM (for surface street simulation) and
FRESIM (for freeway simulation). Version 5.1 of CORSIM offers the
following new features:
CORSIM now provides its own interface and driver software, separate
In addition to the user interface, the CORSIM driver provides access to
a new output data processor. The output processor enables the user
to accumulate user-selected statistics and summary data during
multiple runs of CORSIM. It writes the collected data to an Excel
workbook, a comma-separated file, and/or a tab separated file.
CORSIM can now simulate much larger traffic networks than before.
The maximum link length in NETSIM has been increased from 4000
feet to 9999 feet.
CORSIM can now run simultaneously on multiple test cases in
the same directory.
A new flag is available on RT 2 (entry 3, column 16) to force
CORSIM to use the maximum initialization time.
Logic for determining if a vehicle would join spillback was
Control delay is now aggregated over all turn movements in the
simulation output table.
Anticipatory lane change inputs are now echoed to the output
Exit interface links can now be specified as destinations on
Record Type 74.
Error checking has been improved.
Numerous software corrections have been implemented.
Animation and Graphics Module
A directory has been added to the CD that includes the files
necessary to view and animate traffic networks using
TRAFVU. This directory may be copied by licensed users and
distributed to non-licensed individuals for the purpose of
viewing networks and animating vehicles, signals, and MOE
using files created by a licenced user of the package. The
TRAFVU Viewer directory contains a special licence and
instructional files for distributing TRAFVU as a Viewer.
TRAFVU now displays the bitmap background used by
TRAFED. When exporting the TRAFED network to a CORSIM
input (.TRF) file, TRAFED writes the bitmap information to
the .TRF file. From the Display menu and a corresponding
toolbar button, the user can toggle the display of the
TRAFVU now displays link names on the network map next to
links that have entries on record type 10 in the .TRF file. From
the Display menu and a corresponding toolbar button, the user
can toggle the display of the link names. Using the Preferences
dialog, the user can control the color, size, and placement of the
link names on the network map.
TRAFVU now maintains application and window settings for a
user between TRAFVU sessions. Each user can have different
preference settings. Application-level preferences
include: dynamic scrolling, tool tip display, and APC window
settings (including size and placement). Window-level
preferences include: object display button settings, vehicle
color and detail properties, background color, link name settings,
and window component (toolbar, legend, status bar) display
The user can now control the display of warning and HOV signs
using the Warning Sign item on the Display menu or the
corresponding toolbar button.
It is now possible to right click on an entry link to display its
attributes, e.g., entry volume.
The Zoom Capture and Set dialog have been modified to allow
specifying a file to which window coordinates are saved or from
which they are retrieved. This allows the user to save multiple
sets of coordinates for a single or multiple cases.
TRAFVU can now load cases (.TRF files) from write-protected
directories/drives and from CD-ROM.
Logic has been added to control whether links are animated
above or below intersections.
TShell : TSIS Shell Interface
and Program Manager
TShell is the TSIS environment's GUI that integrates
the TSIS tools and allows the engineer to effectively
manage traffic analysis projects. Version 5.1
introduces the following new features:
The Project view now provides the capability of
sorting the project tree either by the names of the
items on the tree or by the modified dates of the files
associated with the tree items.
Project View properties can now be specified. These
properties include the tree sort parameter and order,
whether files deleted via the tree are sent to the
recycle bin, and whether TShell displays confirmation
dialogs for tree operations.
The Output View properties include background color and text
font, size, and color.
Improved tool management changes include the ability to define
and use multiple tools of the same component.
The Script Tool provides improved interfaces for better
interaction with TShell and for running CORSIM. The Script Tool
User's Guide includes a new, detailed Reference Manual for the
functions defined by these new interfaces.
TSIS 5.1 includes seven sample Visual Basic scripts that use the
new Script Tool interfaces and that demonstrate the new
capabilities of the CORSIM component, including multiple runs
and extraction of data from output files.
Graphical Input Editor
TRAFED is a new product distributed as part of the TSIS5
package. TRAFED is not sold separately - purchasers of TSIS5
receive TRAFED automatically. The ITRAF input editor
commonly used in conjunction with TSIS4 has been updated
and is also available, but must be purchased separately. Users
who are comfortable with TRAFED do not need to purchase
ITRAF.TRAFED allows easy creation and editing of CORSIM
Some of the new features within TRAFED version 5.1 are
Range checking and default settings have been improved.
The user can now scroll past the edge of the existing network
using the scroll buttons.
A new distance-measuring tool has been added to
the toolbar, allowing the user to easily check the
scale of a bitmap image.
The bitmap may be turned on and off with a button
on the toolbar.
The TRF file can be sorted during export so that most
of the records are sorted by their first two fields.
Link splitting has been improved and no longer resets
the signal controllers.
Numerous bugs have been fixed.
Turning volumes present in the TRF file are now
preserved during translation to TNO file format.