00149114

Component

http://onlinepubs.trb.org...s/trr/1976/596/596-003.pdf

http://scholar.google.com...bbay&publication_year=1976

Setting traffic signals in an urban street network involves the determination of cycle time, splits of green time, and offsets. All existing methods use a sequential procedure for calculating the traffic control variables. A common cycle time is established first, then green splits are calculated for each intersection, and, finally, offsets among the signals are determined. Because these three computation stages are not really independent, the results are often not optimal. This paper describes a new computer method, mixed-integer traffic optimization, designed to optimize simultaneously all the traffic control variables of the network. The method has been programmed in conjunction with the mixed- integer routine of IBM's MPSX optimization system and thus provides a globally optimal procedure. It was applied to several traffic signal networks and is shown to offer certain advantages over existing methods. An example is presented in the paper to illustrate the input requirements, output format, and application of the program.

Publication of this paper sponsored by Committee on Traffic Flow Theory and Characteristics. 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.

01411452

Ross, Dale W

pp 6-15

1976

Transportation Research Record

0309025656

Digital/other

Figures (9) ; References (24) ; Tables (4)

Green interval (Traffic signal cycle); Information processing; Offsets (Traffic signal timing); Optimization; Sequencing; Traffic control; Traffic signal control systems; Traffic signal cycle; Traffic signal timing

Highways; Operations and Traffic Management

TRIS, TRB

Apr 13 1977 12:00AM

• DESIGN OF FREEWAY ENTRANCE RAMPS AND LANE DROPS BY USING SEMI-MARKOV PROCESSES (ABRIDGMENT)
• DEVELOPING A PREDICTOR FOR HIGHLY RESPONSIVE SYSTEM-BASED TRAFFIC SIGNAL CONTROL (ABRIDGMENT)
• FREEWAY LANE-CHANGING PROCESS: A MICROSCOPIC APPROACH (ABRIDGMENT)
• MULTILANE TRAFFIC FLOW PROCESS: EVALUATION OF QUEUING AND LANE-CHANGING PATTERNS
• REGULARITY OF SOME DETECTOR-OBSERVED ARTERIAL TRAFFIC VOLUME CHARACTERISTICS
• SIGOP II: A NEW COMPUTER PROGRAM FOR CALCULATING OPTIMAL SIGNAL TIMING PATTERNS