基于VISSIM的交叉口信号配时方案优化设计——以益阳市康富南路-海棠路交叉口为例

Optimum Design of the Signal Timing of the Intersection based on VISSIM Simulation——A Case Study of Kangfu South Road and Haitang Road’s Intersection in Yiyang City

以益阳市康富南路-海棠路交叉口为例,实地调查该交叉口的交通流量、信号配时等数据,运用VISSIM仿真软件建立模型,选取平均排队长度和平均延误作为评价指标,对其交叉口的交通现状进行仿真评价,并在此基础上使用TRRL法对信号配时方案进行优化,运用VISSIM进行仿真评价,对比分析优化前后的仿真结果。结果表明,优化后的信号配时方案缩短了引道排队长度,降低了车辆固定延误,缓解了其交叉口的交通拥堵,提高了通行效率。

Taking the intersection of Kangfu South Road and Haitang road in Yiyang City as an example,this paper investigates the intersection’s traffic flow and signal timing dial,and establishes the model by using VISSIM simulation software,and carries out simulation evaluation on the intersection’s traffic status by selecting the average queue length and average delay as evaluation indexes,and on this basis uses TRRL method to optimize the signal timing dial,and uses VISSIM to simulation evaluation again,compared and analyzed the simulation results before and after.The results show that the optimized signal timing scheme shortens the queue length of approach road,and reduces the fixed delay of vehicles,relieves the traffic congestion of intersection and improves the traffic efficiency.