A PROCEDURE FOR REAL-TIME SIGNAL CONTROL THAT CONSIDERS TRANSIT INTERFERENCE AND PRIORITY

S Yagar
B HAN

Document Type

Journal Article

Publication Date

1994

Subject Area

operations - traffic, infrastructure - bus/tram priority, infrastructure - traffic signals

Keywords

Traffic signal timing, Traffic signal settings, Traffic signal priority systems, Traffic signal preemption, Traffic delay, Toronto (Canada), Settings (Traffic signals), Real time operations, Real time control, Preemption (Traffic signals), Loading and unloading operations, Loading and unloading

Abstract

A rule-based procedure for determining real-time signal timings at a signalized intersection is described. It incorporates the effects of the traffic interference caused by on-line loading/unloading of transit vehicles at the intersection. This procedure generates a number of short-term alternative real-time phase sequences for various levels of transit priority, based on a number of decision rules. It then evaluates these signal sequences and selects the one with the least overall cost to all traffic. The procedure is illustrated in terms of a simulated application to a critical intersection in Toronto's Queen Street corridor using real data. The preliminary simulation tests indicate the potential reduction in total delay compared to fixed-time operation, which results largely from selectively ushering transit vehicles to their loading positions at strategic times and serving cross-street traffic while the transit vehicles are loading.

Comments

Transportation Research Part B Home Page: http://www.sciencedirect.com/science/journal/01912615

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