A DYNAMIC MODEL FOR ADAPTIVE BUS SIGNAL PRIORITY

Adaptive traffic signal control as well as transit signal priority (TSP) have both been viewed as important opportunities for reducing overall traffic congestion and improving bus transit service. However few studies have been conducted on combining them. A dynamic signal timing optimization model was developed in this research, which aims at reallocating green times among the phases with considering the realtime traffic flow condition and the bus priority request. In the model, both arrival and departure flows are described by time- dependent functions, the arrival of a bus with priority request is represented by giving a weight factor to the traffic demand of the associated approach. The weight factor is also defined as a time- dependent function of three variables: present traffic demand and queuing conditions of the bus arriving approach vs. that of the intersection and the lateness of the target bus. As the bus is converted to a relevant number of arrivals of passenger vehicles by the weight factor, the objective of the dynamic model is to minimize the average delay at the intersection

• Supplemental Notes:
  • Publication Date: 2003. Transportation Research Board, Washington DC. Remarks: Paper prepared for presentation at the 82nd annual meeting of the Transportation Research Board, Washington, D.C., January 2003. Format: CD ROM
• Corporate Authors:

  University of California, Berkeley

  California PATH Program, Institute of Transportation Studies
  Richmond Field Station, 1357 South 46th Street
  Richmond, CA  United States  94804-4648

  California Department of Transportation

  1120 N Street
  Sacramento, CA  United States  95814

  University of California, Berkeley

  Department of Electrical Engineering and Computer Sciences
  Berkeley, CA  United States  94720
• Authors:
  • Liu, Hongchao
  • Skabardonis, Alexander
  • Zhang, Wei-Bin
• Conference:
  • Transportation Research Board 82nd Annual Meeting
  • Location: Washington DC, United States
  • Date: 2003-1-12 to 2003-1-16
• Date: 2003

Language

• English

Media Info

• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Adaptive control; Buses; Traffic signal preemption
• Subject Areas: Operations and Traffic Management; Public Transportation;

Filing Info

• Accession Number: 00941664
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: PATH, STATEDOT
• Created Date: May 1 2004 12:00AM