信号交叉口虚拟左转等待区的设置研究

设置左转等待区是提高交叉口运行效率的手段之一，但某些小型交叉口不满足左转等待区设置条件。针对这个问题，本文基于冲突点法，提出一种虚拟左转等待区，建立虚拟等待区时间设置模型，保证直行与左转车辆能安全通过冲突点，利用VISSIM软件对镇平县健康路与工业路交叉口进行实例验证。仿真结果表明:交叉口运行效率得到提升，案例交叉口延误降低了4.9%，通行能力提升了3.1%，左转延误降低了9.1%，通行能力提升了13.6%。

A Method of Signal Control at Intersection with Virtual Left-turn Waiting Areas

The installation of left-turn waiting areas is one of the means to improve the operation efficiency of intersections. Howerer, some small intersections do not meet the conditions of installing left-turn waiting areas. Therefore, the method of virtual left-turn waiting area is proposed based on conflict point method. At the same time, the schedule model is established to ensure safety. A case of Zhen Ping county is used to simulate by VISSIM10.0. The simulation results show that the operation efficiency of the intersection is improved, and the total delay is reduced by 4.9% and the total capacity is increased by 3.1%. Especially, the left-turn delay is reduced by 9.1%, and the left-turn capacity is improved by 13.6%.