检测器数据的精确度对全感应控制的影响分析  

Impacts of Accuracy of Traffic Detector on Fully-actuated Signal Control

作　　者：周敬龙 傅立平 钟鸣[1,2,3] 赵菲 吕正旸 ZHOU Jinglong;FU Liping;ZHONG Ming;ZHAO Fei;LYU Zhengyang(National Engineering Research Center for Water Transport Safety,Wuhan University of Technology,Wuhan 430063,China;Intelligent Transportation Systems Research Center,Wuhan University of Technology,Wuhan 430063,China;Engineering Research Center for Transportation Safety of Ministry of Education,Wuhan University of Technology,Wuhan 430063,China;BSIC(Shanghai)BigData Technology CO,LTD,Shanghai 201103,China)

机构地区：[1]武汉理工大学国家水运安全工程技术研究中心,武汉430063 [2]武汉理工大学智能交通系统研究中心,武汉430063 [3]武汉理工大学水路公路交通安全控制与装备教育部工程研究中心,武汉430063 [4]辉略(上海)大数据科技有限公司,上海201103

出　　处：《交通信息与安全》2019年第4期96-101,共6页Journal of Transport Information and Safety

基　　金：武汉市科技项目(ZSHJ-WHS-FW-2018-658)资助

摘　　要：为了研究交叉口检测器的精确度对全感应信号控制的影响效果,利用Python程序模拟全感应信号控制的控制策略,使用淮安市实际交叉口调查数据在Vissim软件中对单个交叉口进行交通仿真建模。分析对比在不同车辆检测器的精确度下,交叉口采用全感应信号控制方案时的评价指标,主要包括排队长度、车均延误、停车次数等。结果表明,在低峰、平峰和高峰时期,当车辆检测器的精确度分别达到90%,85%和70%时,对排队长度、车均延误和停车次数的改善效果最为明显。交通流量的大小会影响检测器的精确度对全感应信号控制的控制效果。交通流量较小时,全感应信号控制对检测器的精确度要求较高。随着交通流量增大,即使较低精确度的检测器也可以使全感应信号控制达到较为理想的控制效果。而当交通流量达到饱和或者过饱和时,检测器的精确度将不再影响全感应信号控制的控制效果。In order to study impacts of accuracy of vehicle detectors on actuated signal control at intersections,a Python program is used to simulate control strategies of fully-actuated signal control.Data is collected from several intersections from the City of Huai′an.Traffic simulation software Vissim is used simulate traffic flows at one single intersection.Various traffic indices of the intersection with actuated signal control,including queue length,average delay of vehicles,number of stops,etc.,are analyzed and compared under different accuracy of detectors.Simulation results show that under scenarios of low demand,medium demand,and high demand,when the accuracy of the vehicle detectors reach 90%,85%,and 70%,respectively,the fully-actuated signal control can achieve optimal results.It shows that impacts of accuracy on performance of fully-actuated signal control dependent on traffic volume.Scenarios with low traffic volume require higher accuracy of detectors.As traffic volume increases,fully-actuated signal control operates well even with low-accuracy detectors.When traffic flow is saturated,the accuracy of detectors will no longer affect the control effects of fully-actuated signal control.

关 键 词：交通控制 全感应信号控制 检测器精确度 VISSIM仿真 排队长度 车均延误 停车次数 

分 类 号：U491.4[交通运输工程—交通运输规划与管理]