掉头车道的设置方式对交通效率的影响研究

Analysis of left turn traffic flow at intersections based on Vissim simulation

研究乌鲁木齐市沙依巴克区的新医路和友好北路交叉口左转车流当前实际状况,在现有硬件设施基础上,通过Vissim软件仿真评价结果,分析对比直接左转调头与禁左远引调头两种方案的优劣。将新医路和友好北路交叉口实际路网车流量、路网平均延误、路网停车延误、路网平均排队长度作为评价指标因素进行分析对比。仿真后得出该交叉口当车流量在2000~3000辆/h时,采用远引掉头方案进行优化,可以将路网平均延误降低为115~243 s,对比原方案可减少10%~30%。研究期望能在一定程度上有效减少乌鲁木齐市交叉口的拥堵,提高运行效率,并为我国交通运输未来发展提供实践参考。

This article mainly studies the current situation of left-turn traffic at the intersection of Xinyi Road and Youhao North Road in Shayibake District,Urumqi City.The Vissim software is used for simulation evaluation to analyze and compare the advantages and disadvantages of two schemes:direct left-turn and prohibition of left-turn with far-end U-turn.The actual traffic volume,average network delay,parking delay,and average queue length of the intersection of Xinyi Road and Youhao North Road are used as evaluation indicators for analysis and comparison.After simulation,it is found that when the traffic volume is between 2000~3000 vehicles per hour,optimizing the farend U-turn scheme can reduce the average network delay to 115~243 seconds,a decrease of 10%to 30%compared to the original scheme.This research hopes to effectively reduce congestion at intersections in Urumqi City to improve operational efficiency and provide practical reference for the future development of transportation in China.