公交信号主动优先的仿真研究——以上海沪宜公路为例

Simulation Study on Active Priority of Transit Signal:Case Study of Huyi Highway in Shanghai

公交信号优先是提升公交服务水平的重要手段,但它在减少优先相位车辆延误的同时缩短了非优先相位的绿灯时间,所以公交信号优先给路段和交叉口车辆通行的影响是复杂的,测度其时间效用是应用中的难点。该文通过构建沪宜公路(叶城路—陈翔路段)的现状交通仿真模型,选取沿线四个交叉口,综合设置绿灯延长、红灯早断和相位插入三种公交信号优先方案。通过仿真对比公交信号优先和初始信号方案下的交叉口延误、路段延误等指标,综合分析公交信号优先在该路段的时间效用和交通影响。

Public transit signal priority is an important tool to improve the public transportation services,however,it shortens the green time of the nonpriority phase while reducing the vehicle delay of the priority phase.Therefore,the impact of the transit signal priority to road sections and intersections is complicated.It is hard to calculate the time benifit of transit signal priority in applications.This paper constructs a traffic simulation model of Huyi Highway(Yecheng Road-Chenxiang Road).Four intersections along the highway are selected,and three bus signal priority schemes are comprehensively set for green extension,red break and phase insertion.By comparing the intersection delay and road section delay of transit signal priority and the initial signal scheme,the time benefit and traffic impact of the transit signal priority is analyzed.