ANOTHER LOOK AT BANDWIDTH MAXIMIZATION

One solution to the problem of fixed-time traffic-signal coordination is the provision of a large green band that allows road users to drive at a reasonable speed without stopping. This solution is popular with drivers, although it does not necessarily lead to delay minimization except in special cases. A method for deriving the globally maximal bandwidth together with all possible suboptimal values is described. The programs WAVE1 and WAVE2 can also be used to generate curves that show the continuous relation between uniform progression speed and corresponding maximal bandwidth over a wide range of speeds and cycles. The typical shape of this bandwidth-speed relationship is explained theoretically, and the theory is used in the development of the algorithm. It is shown that bandwidth varies greatly with progression speed and it is suggested that setting bandwidth at the globally optimal value may not always be the best choice. The decision to adopt a progression speed, a bandwidth, and a cycle time should take into account a range of values of speed and cycle. The proposed method was applied to 18 data sets of up to 24 intersections taken from the published literature and the results obtained were compared with those given by the mixed-integer linear-programming approach. Computer execution time is extremely short and the storage space required is negligible, so the method could be of interest in practical applications. (Author)

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1983/905/905-007.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=ANOTHER+LOOK+AT+BANDWIDTH+MAXIMIZATION&author=K.+Baass&publication_year=1983
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • 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
• Corporate Authors:

  Transportation Research Board

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  Washington, DC  United States  20001
• Authors:
  • Baass, Karsten G
• Conference:
  • 62nd Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1983-1-17 to 1983-1-21
• Publication Date: 1983

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 38-47
• Monograph Title: TRAFFIC FLOW, CAPACITY, AND MEASUREMENTS
• Serial:
  • Transportation Research Record
  • Issue Number: 905
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Algorithms; Bandwidth; Computer programs; Linear programming; Maximization; Pretimed traffic signal controllers; Progression (Mathematics); Reduction (Chemistry); Traffic delays; Traffic signal control systems; Traffic signal cycle; Traffic speed
• Old TRIS Terms: Progression; Reduction
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 00378817
• Record Type: Publication
• Report/Paper Numbers: HS-036 184
• Files: HSL, TRIS, TRB
• Created Date: Dec 30 1984 12:00AM