车均延误最小情况下的相位差优化方法

Offset optimization with minimum average vehicle delay

基于到达-驶离图式,以相位差为自变量建立了协调控制车均延误模型。以车均延误最小为目标,提出了单向和双向协调下的相位差优化方法,通过数值算例说明了该方法的应用过程。基于微观仿真,分析了最优相位差取值的影响因素。结果表明:初始排队对最优相位差取值没有影响;存在滞留排队时,最优相位差在头车到达时刻截停数秒后取到,交叉口间距增大,则头车截停时间增大;协调流率或转入流率增大,则最优相位差增大。

Based on arrival-departure pattern,a unit delay model of coordinated control was proposed with the offset as the independent variable. The offset was optimized with the goal of minimizing unit delay. A numerical case was used to illustratd the application process of the offset optimization algorithm. Based on microscopic simulation,the influencing factors of the optimal offset value were analyzed. The results indicate that initial queuing has no effect on the optimal offset value. If there exists is a stranded queue,the optimal offset is postponed a few seconds after the head car arrives. When the distance between two intersections increases,the postponed time increases,and when the coordinated flow or the flow-in increases,the optimal offset increases.