Abstract:

In order to improve the allocation and installation specifications of traffic signal lights for road,the conflict matrix of various vehicle flows at T-intersections is proposed based on right-of-way rules,and then two models of the traffic capacity and the average vehicle delay at one unsignalized intersection are obtained according to the gap acceptance and queuing theories. Then,from the viewpoint of traffic efficiency,the average vehicle delay is taken as the discriminant index to describe the relationship between the difference of the average vehicle delay before and after the signal setting and the movement volume. Finally,the critical traffic volumes for the signal setting under specific conditions are achieved via the optimal control pattern with lower delay.

Key words: traffic signal setting, critical traffic volume, conflict matrix, traffic capacity, delay