Coordination of Actuated Arterial Traffic Signal Systems

Abstract

Coordinated timing plans may be developed for actuated signal systems but all existing optimization methods require that each actuated signal be converted to its nearest equivalent pretimed unit. Using bandwidth maximization as a starting point, a new procedure is developed that specifically accounts for actuated timing flexibility. Yield points and force offs at non‐critical signals are adjusted so they just touch the edges of the through‐band while critical signals are unmodified. This method is applied to a data set describing midday traffic conditions on an urban arterial system of six signals in central Illinois. Simulation is used to evaluate these timing plans and compare them with corresponding pretimed alternatives.