交通干线信号灯配时的公共周期优化方法  

Public Cycle Optimization Method for Arterial Traffic Signal Timing

作　　者：党璠煜 樊秀梅[1] 张兴辉 DANG Fanyu;FAN Xiumei;ZHANG Xinghui(College of Automation and Information Engineering,Xi’an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学自动化与信息工程学院,西安710048

出　　处：《现代交通技术》2022年第5期76-80,共5页Modern Transportation Technology

基　　金：国家自然科学基金项目(No.61272509);陕西省重点研发计划一般项目(2021GY—072)。

摘　　要：信号周期作为交通信号控制的首要参数,在信号配时中起着关键作用,但目前大多数信号配时方法都将重点放在绿信比和相位差的优化,在计算周期时主要仍沿用经典的韦伯斯特(Webster)配时法。因此,对交通干线多路口协调控制中的信号灯配时参数公共周期进行研究。首先考虑相邻交叉口间距对信号周期的影响,再通过拟合信号周期与车辆延误、通行能力的关系,确定公共周期的可调整范围;同时建立公共周期关于车辆延误、通行能力的双目标模型,在约束条件下利用遗传算法在MATLAB中对其进行求解;最后在微观交通仿真平台VISSIM中搭建以四个交叉口组成的干线系统,对本文所提出的方法进行实验验证。仿真结果表明,该公共周期优化方法相比改进的F-B法,在车辆延误上降低了11.2%,在通行能力上提高了2.1%。As the primary parameter of traffic signal control,signal cycle plays a key role in timing. However,most signal timing methods focus on the optimization of green splits and offset,and the classical Webster timing method is still used in calculating the cycle. Therefore,based on the multi intersection coordinated control of traffic arterial road,this paper studies the parameter public cycle in signal timing. Firstly,the influence of adjacent intersection’s spacing on the signal cycle is considered,and then the adjustable range of public cycle is determined by fitting the relationship between signal cycle,vehicle delay and capacity;The bi-objective model of vehicle delay and capacity in public cycle is established,which is solved by genetic algorithm in MATLAB under constraints;Finally,an arterial system composed of four intersections is built in the micro traffic simulation platform VISSIM to verify the proposed method. The simulation results show that compared with the improved F-B method,the proposed public cycle optimization method reduces vehicle delay by 11. 2% and increases traffic capacity by 2. 1%.

关 键 词：干线协调 信号配时 公共周期 遗传算法 

分 类 号：U491.5[交通运输工程—交通运输规划与管理]