摘要
干道常常被人们誉为"城市交通的大动脉",是城市内部的重要交通道路。交叉口作为干道与干道之间的关键节点,是实现不同道路连接的纽带,也是车辆持续通行的咽喉。对城市干道信号交叉口相位相序的模型进行研究,提出了相位矩阵的表示方法,并结合信号交叉口约束条件,使用MATLAB软件构造出干道交叉口的相位相序结构优化算法,采用遗传算法计算原理得到最小总延误。同时,通过模型计算输出信号交叉口新的相位相序及有效绿灯时间组成新的配时方案,结合城市干道信号交叉口实际采集的数据,在MATLAB构造的目标函数值中与实际信号配时进行对比验证,最后运用VISSIM仿真软件对优化的相位相序方案进行仿真验证分析,与实际相位相序方案的平均延误进行比较。结果表明,新的相位相序方案达到了减小信号交叉口路网平均延误的目的,从而提高城市干道的通行能力。
Roads are often known as the"artery"city traffic,traffic is an important road within the city.Intersection as a key node between road and road,is the link for the realization of different road connection,and vehicle traffic throat continued.This article conducts the research on the model of City Road intersection phase,the phase matrix representation method,and combined with the signal intersection constraints,using MATLAB software to construct the optimization phase structure of Road intersection,using genetic algorithm to calculate the principle of minimum total delay.At the same time,through the calculation of the model output signal intersection of new phase and effective green time to form a new timing scheme,combined with the city road intersection,the actual collection of data,compared with the actual signal and the objective function constructed by MATLAB value,finally using the VISSIM simulation software to optimize the phase plan simulation analysis,the average delay and the actual phase scheme comparison.The results show that the new phase scheme to reduce the average delay of the signalized intersection network,so as to improve the city road traffic capacity,to achieve a good effect of Road intersection optimization model of phase sequence.
作者
李硕
黎强
LI Shuo;LI Qiang(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,Chian)
出处
《公路工程》
北大核心
2018年第6期157-162,共6页
Highway Engineering
关键词
相序结构优化算法
遗传算法
干道信号交叉口
新的配时方案
信号交叉口的总延
phase sequence structure optimization algorithm
genetic algorithm
road signal intersection
new timing scheme
signal intersection general extension
作者简介
李硕(1958-),男,湖南长沙人,教授,主要从事交通流理论、交通控制、交通规划等方面的研究。
