协调路口划分对交通控制效果的影响分析

Analysis of Influence of Coordinated Intersections Partition on Traffic Control Effect

基于Synchro软件对干线协调的路口进行恰当地划分,Synchro软件中用协调因子来衡量相邻路口间是否需要实行协调控制,协调因子的计算主要考虑行程时间、距离、流量、车队形式、周期时长等因素;然后分析了干线协调优化逻辑,并用交通仿真的方法分析不同划分策略对控制效果的影响,并选取最佳的划分;对六一路全线11个交叉口进行案例分析,Synchro在协调路口划分中的有效性得到验证。结果表明协调路口划分会显著地影响整个网络中车辆的延误和停车次数,不恰当的划分会导致延误大幅增加。但不论哪种划分方式,都会显著减小主路和整个网络的停车次数。最佳的划分方式使整个网络延误降低10%,平均停车次数降低11%。

The arterial road coordinated intersections are partitioned based on Synchro software which uses coordination factor to determine whether the adjacent intersections need to be coordinated. The calculation of coordination factor mainly considers travel time,distance,volume,platoon form and cycle length. After analyzing the optimization logic of arterial road coordination,traffic simulation method is adopted to analyse the impacts of different partition strategies on the traffic control effects,and the best partition is selected.Then,Liuyi Road including 11 intersections is analysed as the example,and the effectiveness of applying Synchro to the coordinated intersections partition is verified. The results show that（ 1） coordinated intersections partition will significantly influence the delay and the number of stops in the whole network,and improper partitions will lead to a substantial increase in delay;（ 2） but it will significantly reduce the number of stops in main roads and the whole network no matter what kind of partition method is used;（ 3） the best partition would get a reduction of delay by 10% in the whole network,and reduction of average stops by 11%.