基于VISSIM仿真的USC型交叉口通行能力研究

摘要

对于过饱和平面交叉口运用传统的左转交通组织设计来改善路口的运行性能很难取得令人满意的效果。为此文章针对国外提出的USC型交叉口，介绍了其工作原理和特殊的左转交通组织方式。运用微观交通仿真软件VISSIM对USC型交叉口和常规4相位信号控制交叉口进行模拟。在对比分析模拟数据的基础上，发现USC型交叉口能有效减少交叉口冲突和延误。提高交叉口的通行能力。特别适用于左转流量较大的交叉口。但是．这种类型的交叉口交通组织方式特殊．在投入实际应用前．还须深入研究以下问题：标志标线设计、与其他交叉口的衔接、信号配时的优化设计、行人过街组织、具体技术指标的确定。%Conventional management is sometimes useless to improve the performance of some heavy-traffic intersections.So engineers have looked to alternative measures for dealing with left-turns at intersections to improve performance, some of which have been unconventional schemes. This paper introduces an unconventinal intersection: Upstream Signalized Crossover Intersection. In this paper, VISSIM is used to evaluate the performance of USC compared to the conventional four-phase intersection.And further research of USC before it could be applied to practice is also discussed.