典型T型交叉口的优化设计与仿真评价

Optimization Design and Simulation Study of Typical T-intersection

通过对某典型T型交叉口的实地调研,从交通组织渠化、信号配时等角度对交叉口现状进行分析,并进行VISSIM仿真,选用延误、行程时间、饱和度等参数评价交叉口的运行状况,以此为基础设计优化方案。通过对改善方案进行VISSIM仿真对比,结论表明方案二采用主交叉口与小交叉口结合的方式对改善交通拥堵有显著效果,同时,对主交叉与小交叉实行信号的联动控制,能满足日后迅速增长的交通需求。

This paper was based on field investigation and research of a typical T-intersection. It analyses the present situation of intersection from the aspects of channelized traffic organization, signal timing, etc. As well as combining with the VISSIM simulation software, the paper put forward an optimization design scheme by selecting parameters such as delay, travel time, saturation to assessment intersection operation condition. Through comparing the improvement scheme by VISSIM simulation, the results indicated that the second scheme with the combination of main intersection and small intersection has significant function on improving traffic congestion at the same time. And the coordination control of the main and small intersetion can satisfy the rapid growth of traffic demand in the future.