THE BANDWIDTH-CONSTRAINED TRANSYT SIGNAL-OPTIMIZATION PROGRAM (DISCUSSION AND CLOSURE)

A discussion is presented of previous attempts to combine bandwidths and delay and stop considerations as criteria for computing signal-timing plans for arterial signal systems. In particular, deficiencies in these previous attempts are pointed out. A new approach that involves constraining the TRANSYT-7F model to preserve the two-way band computed by a bandwidth program is described. This new approach was tested on 10 widely varying arterial data sets by using the MAXBAND program to develop the green bands, and the NETSIM model to evaluate the effectiveness of the resultant signal-timing plans with a weighted combination of delay and stops as the measure of performance. It is shown that no statistically significant improvement in arterial performance is obtained by adjusting offsets only, even in the case of short block spacing. However, if both offsets and green times are adjusted, statistically significant improvements in arterial performance are obtained.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1986/1057/1057-001.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=THE+BANDWIDTH-CONSTRAINED+TRANSYT+SIGNAL-OPTIMIZATION+PROGRAM+(DISCUSSION+AND+CLOSURE)&author=S.+Cohen&author=C.+Liu&publication_year=1986
• Availability:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Traffic Signal Systems. 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
• Corporate Authors:

  Transportation Research Board

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  Washington, DC  United States  20001
• Authors:
  • Cohen, Stephen L
  • Liu, C C
• Discussers:
  • Chang, Edmond Chin-Ping
• Publication Date: 1986

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1-9
• Monograph Title: TRAFFIC SIGNAL SYSTEMS
• Serial:
  • Transportation Research Record
  • Issue Number: 1057
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Adjustment factors; Bandwidth; Computer programs; Constraints; Equipment maintenance; Green interval (Traffic signal cycle); Measures of effectiveness; Offsets (Traffic signal timing); Optimization; Traffic signal timing
• Uncontrolled Terms: Effectiveness; Equipment adjustment
• Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00460092
• Record Type: Publication
• ISBN: 0309040515
• Files: TRIS, TRB
• Created Date: Nov 30 1986 12:00AM