01370339

Component

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.

This paper was sponsored by TRB committee AHB25 Traffic Signal Systems

01362476

12-3803

English

16p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; References; Tables

Green interval (Traffic signal cycle); Methodology; Phases by type of traffic; Real time control; Traffic oversaturation; Traffic signal timing

Data and Information Technology; Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control

Transportation Research Board Annual Meeting 2012 Paper #12-3803

TRIS, TRB

Feb 8 2012 5:19PM