平行流交叉口信号控制策略及效益分析

为解决平行流交叉口左转多次停车问题，实现同一相位放行左转、直行和右转车流的同时，所有流向车辆最多停车一次，对平行流交叉口进行设计，提出两种设计方案，对比已有方案，选择左转右置的平行流交叉口作为研究对象，探讨其优劣. 根据车流运行特征，以车辆不存在二次停车，车车不冲突作为约束条件，建立优化模型，并进行效益分析. 结果显示，与传统经典十字交叉口控制相比，平行流交叉口使通行能力提升60%以上，车均延误下降约 70%. 本文提出的控制策略，在不牺牲车辆权益的情况下，能消除左转和直行冲突，提升交叉口通行能力，为平行流交叉口研究提供一个新的视角.

Signal Control Strategy and Benefit Analysis of Parallel Flow Intersection

In order to solve the stopping problem of left- turning traffic at parallel flow interactions, this paper first proposes design schemes for the interactions to allow the left-turn, straight-going, and right-turn traffic flow in the one signal phase with all the traffic vehicles stopping at most one time. Two types of design schemes are proposed and compared with the existing design scheme. The parallel flow interaction with left-turn lanes placed on the right is focused on. Based on the characteristics of traffic flow, an optimization model is then constructed and some constraints are designed to avoid secondary stopping and conflicts of vehicles. The performance of the model is evaluated. The results show that compared with the traditional intersection control, the intersection capacity is increased by more than 60%, and the vehicle delay is reduced by about 70%. The proposed control strategy can eliminate the conflicts of left-turn and straight-going traffic and improve the intersection capacity of intersections without sacrificing the benefits of vehicles. This control strategy provides a new perspective for the study on parallel flow intersections.