A NEW APPROACH FOR SPECIFYING DELAY-BASED TRAFFIC SIGNAL WARRANTS

A methodology is presented that uses both field studies and traffic simulation for developing delay-based traffic signal warrants. The field studies were performed to confirm the validity of the UTCS-1 simulation program. These warrants are based on a competition between two types of intersection control: traffic signals and two-way stop signs. Several of the worst common right-angle inter- section configurations were analyzed over the entire spectrum of traffic volumes on their approaches. Analysis of the results led to the definition of criteria, based on volume and delay considerations, for selecting the appropriate type of control. The resulting warrants are expressed in graphical format, and accompanying specifications are given.