MORE SIGNAL CAPACITY--WITH LESS GREEN?

This article illustrates the effects of signal queues on traffic operations at closely spaced intersections. The authors propose an approach that relates the size of a downstream queue to physical link length and saturation flow rate at the upstream signal. Queue interaction effects occur when traffic volumes approach capacity. Queue interaction results in lower system output, added delay to the upstream link, and high probability of spill back. The proposed method also demonstrates the utility of signal-based methods in overcoming some detrimental aspects of queue interaction. Specifically, the use of simultaneous offset settings and metering policies at the upstream signal were found to be effective. Turning traffic from side roads at the upstream signal has been shown to cause further degradation of the traffic operations at closely spaced signals. Investigators suggest extension of the method to multiple intersections and complex phasing schemes.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/614107147
• Corporate Authors:

  Institute of Transportation Engineers (ITE)

  Washington, DC  United States 
• Authors:
  • Rouphail, N M
  • Akcelik, R
• Publication Date: 1996-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 34-40
• Serial:
  • ITE Journal
  • Volume: 66
  • Issue Number: 7
  • Publisher: Institute of Transportation Engineers (ITE)
  • ISSN: 0162-8178
  • Serial URL: https://www.ite.org/publications/ite-journal/

Subject/Index Terms

• TRT Terms: Flow; Highway operations; Length; Operations research; Percent saturation; Queuing; Signalized intersections; Spacing; Traffic signal control systems; Traffic volume
• Uncontrolled Terms: Flow rate; Interactions
• Old TRIS Terms: Traffic operations research
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00726956
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Oct 17 1996 12:00AM