摘要
由于区域交通控制中Webster延迟模型未考虑子区内交叉口之间相位差协调机制,导致延迟模型计算结果不够准确,进而造成信号配时方案分配不够合理。现将路网子区中的交叉口分为边界交叉口和内部交叉口,提出了一种基于相位差协调的改进Webster延迟模型。该延迟模型通过分析车流在内部交叉口入口产生排队延迟的机理,在子区内部交叉口之间引入相位差协调机制,将整个路网子区内所有交叉口按相位差协调关联起来,以达到子区路网整体协调的效果。以子区内车辆平均延迟最小为优化目标,采用遗传粒子群混合算法对目标函数进行优化,实现将子区内的所有交叉口信号按相位差进行协调优化控制。仿真实验表明,应用所提出的改进型延迟优化模型及协调控制方法,能明显降低车辆通过区域路网的平均延误时间。
For the Webster delay model in the area traffic control,the phase difference coordination mechanism between the intersections in the subarea is not considered,which leads to the inaccurate calculation result of the delay model,and then brings the unreasonable allocation of the signal timing solution.For this,the intersection of road network is divided into boundary intersection and internal intersection,and an improved Webster delay model based on phase difference coordination is proposed.By analyzing the mechanism of queuing delay in the entrance of the internal intersection,the delay model introduces phase difference coordination mechanism between the inner intersections of subarea to achieve the effect of overall coordination of the subarea road network.Based on the optimization of the average delay of vehicle in the subarea,the objective function is optimized by using the genetic particle swarm mixing algorithm,which realizes the coordinated optimization control of all intersections in the subarea according to the phase difference.The simulation shows that the improved delay optimization model and the coordinated control method can obviously reduce the average delay time of the vehicle through the regional road network.
作者
胡海涛
罗杰
HU Hai-tao;LUO Jie(School of Automation,Nanjing University of Posts and Telecommunications,Nanjing 210046,China)
出处
《计算机技术与发展》
2018年第6期151-155,共5页
Computer Technology and Development
基金
江苏省自然科学基金项目(BK2011758)
关键词
子区协调优化
延迟模型
相位差
遗传粒子群混合算法
subarea coordination optimization
delay model
phase difference
genetic particle swarm mixing algorithm
