Development of Optimal Threshold Parameters for Traffic Responsive Control in Arterial Signal Systems

摘要

A procedure was developed for determining optimal threshold parameters for switching between signal timing plans in a traffic responsive signal system. The report describes the procedure in terms of the theory upon which it is based and the steps required for the application. The parameters of a typical signal timing plan include cycle length, splits and offsets. Pre-designed plans containing various combinations of these parameters are stored in a library. Thresholds for switching between cycle length plans are based on total volume. Split plan switching is based on the relationship between artery and cross street volumes. Offset plan switching is based on the relationship between inbound and outbound volumes.