T型交叉口支路左转车辆远引掉头组织研究

Organization of U-Turn Followed by Right-Turn of Left Turning Vehicles on Branch Roads at T-Intersections

为了减小交叉口车辆延误及增大主路车辆通过效率,选择支路左转车辆为研究对象,提出了支路左转车辆远引掉头交通组织方法。本文通过分析T型交叉口支路远引左转车辆先右转后掉头的运行过程,结合可接受间隙理论及排队论理论计算车辆变换车道产生的交织距离以及等待掉头的排队长度,建立支路路口与路段掉头开口间距模型,并以成都市黄金路某T型交叉口为例子进行VISSIM仿真验证,实验结果表明远引掉头组织方法使该交叉口车辆平均延误减少了12.5s,简化了交叉口信号相位,增大了主路车辆的通过效率,为城市道路路段掉头口的设计规划提供参考。

In order to reduce vehicle delays at intersections and increase the passing efficiency of vehicles on the main road,the left-turning vehicles on the branch roads are selected as the research object,and a method of traffic organization of U-turn followed by right-turn of left turning vehicles on Branch Roads is proposed.This paper firstly analyzes the long-distance operation process of vehicles turning left on the branch road at T-intersection before turning right and then turning around,combining the gap acceptance theory and queuing theory to calculate the interweaving distance caused by vehicles changing lanes and the queue length waiting to U-turns,a model of the distance between the branch road junction and the U-turn opening of the road section is established.Finally,a T-shaped intersection on Chengdu Golden Road was used as an example to carry out VISSIM simulation verification.The simulation results show that the method of U-turn followed by right-turn reduces the average delay of vehicles at the intersection by 12.5 s,simplifies the signal phase at the intersection,increases the passing efficiency of vehicles in the main road,and also provides a reference for the design and planning of U-turns in urban road sections.