交通瓶颈下相序设置对路口交通状况影响分析

Analysis of Effect of Phase Order Setup on Traffic at Intersection under Traffic Bottleneck

针对路段发生交通瓶颈时上游路段可能出现的溢流现象,在分析不同相序设置下进入交通瓶颈路段车流构成的基础上,应用车流波动理论,从进入交通瓶颈路段的车流与交通瓶颈通行能力间关系出发,分别就不同相序相同车流量以及相同相序不同车流量时交通瓶颈上游车流的集散波进行分析对比,将周期内不同的相序设置及车流量对交通瓶颈上游溢流情况的影响进行了研究,针对各种情况,得到通过改变相序避免溢流情况发生需要满足的条件。研究结果表明,在某些条件下,相序的变化对避免溢流现象发生的影响不大,而当满足一定条件时,通过改变相序设置可以有效的避免溢流情况的发生。

Focused on the flooding on upstream section when traffic bottleneck happening, based on analyzing the composing of section traffic flow for different phase orders and applying the traffic flow wave theory, by dividing the relation between traffic flow which gets into traffic bottle section and the service capacity of traffic bottleneck, comparisons of gather-disperse waves of upstream traffic flows which have the same phase order but the different traffic volumes and which have the different phase orders but the same traffic volume under traffic bottleneck were conducted respectively, and the effect of different phase orders setup and traffic volume in one cycle on the flooding of upstream in section traffic bottleneck was studied. With all the instance, the condition which meet the need for avoiding the flooding instance by changing phase order was gotten. The result indicates that phase order changing has little effect on flooding under some condition and the flooding instance can be avoided availably by changing the phase order when other condition is accorded.