Simple Forward-Backward Procedure for Real-Time Signal Timing Adjustment on Oversaturated Arterial Networks

Under oversaturated traffic conditions, signal timing needs to be adjusted based on real-time traffic performance measures. Building upon the recently proposed oversaturation severity index (OSI), we develop a simple forward-backward procedure (FBP) to manage oversaturation. The forward process aims to increase green time by searching available green time which can be taken from side streets or conflict phases, therefore improving the throughput for main streets; and the backward process is to gate the traffic at some intersections to prevent residual queues and downstream queue spill-back when available green time increase is insufficient. The FBP is designed for real-time implementation, although it is also applicable for off-line signal timing adjustment. The simulation tests for the network in the City of Pasadena, California indicate that the FBP can effectively and efficiently reduce oversaturation.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AHB25 Traffic Signal Systems
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Hu, Heng
  • Wu, Xinkai
  • Liu, Henry X
• Conference:
  • Transportation Research Board 91st Annual Meeting
  • Location: Washington DC, United States
  • Date: 2012-1-22 to 2012-1-26
• Date: 2012

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 16p
• Monograph Title: TRB 91st Annual Meeting Compendium of Papers DVD

Subject/Index Terms

• TRT Terms: Green interval (Traffic signal cycle); Methodology; Phases by type of traffic; Real time control; Traffic oversaturation; Traffic signal timing
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control;

Filing Info

• Accession Number: 01370339
• Record Type: Publication
• Report/Paper Numbers: 12-3803
• Files: TRIS, TRB
• Created Date: May 16 2012 4:09PM