左转待转区对干线协调信号控制的影响分析

Analysis of Influence of Left Turn Waiting Area on Arterial Coordination Signal Control

城市大中型交叉口往往会设置左转待转区.为研究左转待转区对干线协调信号控制的影响.文中选取武汉市解放大道两个连续设有左转待转区的信号控制交叉口,利用MAXBAND算法分别计算在有无左转待转区条件下的干线最大绿波带宽,并通过硬件在环交通仿真实验对有无左转待转区条件下干线协调控制的延误和排队长度进行对比分析.结果表明:设置左转待转区后干线协调系统的综合平均延误比未设置左转待转区增加约19.6%,综合平均排队长度比未设置左转待转区增加约9.1%.因此,设置左转待转区需要综合考虑干线协调控制的效益,避免盲目滥用左转待转区造成干线车辆排队和延误的增加.

Large and medium-sized intersections in cities often set up left-turn waiting areas.In order to study the influence of left-turn waiting area on coordinated signal control of trunk line,two signalized intersections with left-turn waiting area in Jiefang Avenue,Wuhan were selected,and the maximum green wave bandwidth of trunk line with or without left-turn waiting area was calculated by using MAXBAND algorithm.Through the hardware-in-loop traffic simulation experiment,the delay and queue length of trunk coordinated control with or without left-turn waiting area were compared and analyzed.The results show that the comprehensive average delay of trunk coordination system with left-turn waiting area increases by about 19.6%and the comprehensive average queue length increases by about 9.1%compared with that without left-turn waiting area.Therefore,it is necessary to comprehensively consider the benefits of coordinated control of trunk lines to set up the left-turn waiting area,so as to avoid the increase of queue and delay of trunk lines caused by blind abuse of the left-turn waiting area.