短车道对信号交叉口通行能力影响研究

针对交叉口进口道拓宽后形成的短车道,由于其长度的限制,存在因车辆排队溢出而造成阻塞的问题,结合交通流理论和概率论的相关成果,从定性分析和定量计算两方面研究了短车道排队阻塞对信号交叉口通行能力的影响。针对3种不同的信号相位方案,建立了考虑短车道潜在排队阻塞情况下的车道组通行能力计算模型,并通过仿真对模型进行了检验。在此基础上,进行了短车道条件下相关因素对信号交叉口通行能力影响的敏感性分析。研究发现在交叉口进口道存有短车道条件下,短车道长度、信号相位方案对通行能力起主要影响;同时对通行能力而言,存在最佳信号周期。

Research on Impact of Short Lane on Signalized Intersection Capacity

Since the limited length of short lane,there occurs the potential effect of queue blockage for the road widening intersections.Based on the related results of traffic flow theory and probability theory,the impact of the short lane on the capacity of the signalized intersections was worked out with the qualitative and quantitative analysis.For the three different signal-phase programs,the calculation model of lane group's capacity was established with the consideration of potential blockage and tested with simulation method.Then,the study on the related factors and the sensitivity analysis about the impact on the capacity due to the short lane were conducted.According to the study,the length of short lane and the signal phase effect the signalized intersection capacity greatly,and there exists an optimum signal cycle to the capacity.