交通瓶颈影响下两路口联动控制策略研究

针对路口相关路段发生交通瓶颈现象时原有的路口控制策略很可能会产生溢流现象这一问题,在对周期内路段车流组成进行分析的基础上,应用集散波理论,分析了不同交通瓶颈通行能力对上游路口到交通瓶颈间路段溢流现象产生的影响,针对该影响,分析了交通瓶颈下游路口为消除该影响在控制策略方面应进行的调整,分析结果表明,下游路口某车道排队长度延伸至交通瓶颈可能会使上游路口在同样信号控制策略下从非溢流状态变为溢流状态;一方面可通过延长下游路口相关相位的绿灯时间来避免上游路口到交通瓶颈间路段的溢流现象;另一方面可以通过改变上下游路口间的相位差来消除交通瓶颈通行能力改变对溢流现象产生的影响.

Study on Two Intersections Linkage Control Under Traffic Bottleneck

Customary intersection control strategy may result in flooding instance when traffic bottleneck happens on the lane. Focused on this question, the composing of lane traffic for different phase order is analyzed, on the basis of traffic flow wave theory, at first, the effect of different traffic bot- tleneck transit ability to flooding instance is analyzed, then aim to this effect, how to adjust the con- trol strategy of the backward position intersection for avoiding this effect is analyzed, the analysis con- clusion is put forward. The study result indicates that the length of vehicle queue that extends to backward position intersection can make the vehicle queue between ahead intersection and traffic bot- tleneck changes from non flooding instance to flooding instance, and one hand the flooding instance can be avoided by changing the phase dispersion between ahead intersection and backward position in- tersection, the other hand the flooding instance can be avoided by changing the green phase time of backward position intersection.