A two-way progression model for arterial signal coordination considering side-street turning traffic

Abstract

ABSTRACTAn effective progression model should explicitly consider the turning traffic from side streets especially when the traffic volume is relatively high and the spacing between arterial intersections is short. In this paper, a new two-way bandwidth maximization approach is proposed considering left-turning traffic. The basic framework is a modified MULTIBAND model, which redefines the progression lines to more accurately consider the queueing process. We first present a bandwidth maximization model LT1, which maximizes progression bands for arterial through traffic. The features of different queue profiles are captured in the queue clearance time. Moreover, we extend the LT1 model to consider progression bands for the side-street left-turning traffic, referred to as LT2. For the lead left-turn pattern, a minimum bandwidth constraint is introduced based on an approximate delay model. Numerical results show that the proposed model can effectively reduce the overall network average delay and number of stops per vehicle.