00677591

Component

http://onlinepubs.trb.org...trr/1994/1456/1456-007.pdf

https://scholar.google.co...asua&publication_year=1994

Research conducted at the Georgia Institute of Technology that investigated the use of geographic information system (GIS) technology as a support tool for coordinating traffic signals is discussed. TRANSYT-7F is the most widely used and respected macroscopic computer model for optimizing the coordination of traffic signals. Unfortunately, creating an optimum TRANSYT-7F model is very costly. The hypothesis of this research was that the use of a specialized GIS with TRANSYT-7F could enhance the process of coordinating a traffic signal system. The research resulted in the development of a GIS-based signal coordination system that operates on a microcomputer. This system is an improvement over existing methods of creating optimum TRANSYT-7F models because relationships between intersections do not have to be encoded manually. Instead, the system takes advantage of the GIS's topological data structure, which provides these relationships. The process of analyzing different network optimization scenarios is simplified with this system because the user need only to select the intersections to be coordinated from the GIS graphic display instead of cutting and pasting from existing TRANSYT-7F input files. Alternatively, the system can serve as a multipurpose signal information system and play a vital role in decision support. It can provide improved access to signal data and allows for swift identification of intersections that experience excessive delays or unacceptable levels of service.

This paper appears in Transportation Research Record No. 1456, Traffic Signing, Signals, and Visibility. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01396801

English

p. 54-63

1994

Transportation Research Record

0309060648

Figures (8) ; References (20)

Decision support systems; Geographic information systems; Microcomputers; Optimization; Traffic signal control systems

TRANSYT (Computer program)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB

May 4 1995 12:00AM

• AGE DIFFERENCES IN COMPREHENSION OF TRAFFIC SIGN SYMBOLS
• ARTERIAL SIGNAL OPTIMIZATION CONSIDERING LEFT-TURN CONTROL
• CONSPICUITY IN TERMS OF PERIPHERAL VISUAL DETECTION AND RECOGNITION OF FLUORESCENT COLOR TARGETS VERSUS NONFLUORESCENT COLOR TARGETS AGAINST DIFFERENT BACKGROUNDS IN DAYTIME
• CURRENT STATE PRACTICES AND RECOMMENDATIONS FOR IMPROVING RAIL-HIGHWAY GRADE CROSSING PROGRAM
• DEVELOPMENT OF BILINGUAL FREEWAY EXIT SEQUENCE SIGNS
• EFFECTIVENESS OF DO NOT BLOCK INTERSECTION SIGNS (WITH DISCUSSION)
• FIELD VERIFICATION OF COORDINATED ACTUATED CONTROL
• LEGIBILITY AND CONSPICUITY PERFORMANCE OF DRY AND WET BEADS ON PAINT AND REFLECTIVE SHEETING LICENSE PLATES UNDER LOW-BEAM ILLUMINATION AT NIGHT
• LIGHT OUTPUT OF U.S., EUROPEAN, AND JAPANESE LOW-BEAM HEADLAMPS
• OPTIMIZATION OF SIGNAL PHASING AND TIMING USING CAUCHY SIMULATED ANNEALING
• PROPOSAL FOR STANDARD U.S. HEADLAMP BEAM PATTERN FOR EVALUATION OF RETROREFLECTION
• SIMULATION-NEURAL NETWORK MODEL FOR EVALUATING DILEMMA ZONE PROBLEMS AT HIGH-SPEED SIGNALIZED INTERSECTIONS
• TRAFFIC CONTROL DEVICES FOR PARKING LOTS
• USE OF SUPPLEMENTAL PLAQUES TO IMPROVE EFFECTIVENESS OF WARNING SIGNS