信号控制下路段交通承载能力计算及交叉口配时优化模型  

Calculation of road section traffic carrying capacity and timing optimization model of intersection under signal control

作　　者：卢凯[1,2] 汪丽 吴蔚 邓兴栋[3] Lu Kai;Wang Li;Wu Wei;Deng Xingdong(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies,Southeast University,Nanjing 211189,China;Guangdong Province Key Enterprise Laboratory of Urban Sensing and Monitoring/Early Warning,Guangzhou Urban Planning and Design Survey Research Institute,Guangzhou 510060,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]东南大学现代城市交通技术江苏高校协同创新中心,南京211189 [3]广州市城市规划勘测设计研究院广东省城市感知与监测预警企业重点实验室,广州510060

出　　处：《东南大学学报（自然科学版）》2021年第2期333-341,共9页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金面上资助项目(61773168,61873098);中央高校基本科研业务费专项资金资助项目(2019ZD45).

摘　　要：为了能够对信号控制下的路段交通承载能力进行准确分析计算,综合考虑路段空间属性、路段排队长度、驶入驶出流量以及交通控制方案等因素,给出了道路及路段与信号交叉口的交通承载能力定义,推导了最长承载时间与最大承载车辆总数的计算方法,建立了信号交叉口的交通承载能力优化模型,并搭建了基于VISSIM与PYTHON的实时交互仿真实验平台.针对算例中信号交叉口流量不变与流量动态变化2种情形进行了计算仿真.结果表明,与现有的等饱和度配时方法相比,该优化模型2种情形的最长承载时间分别增加了约23.0%和55.1%,且仿真结果与计算值的最大偏差在12.4%以内,验证了优化模型的有效性,实现了通过延长最长承载时间降低过饱和交叉口上游发生排队溢流的风险.To accurately analyze and calculate the traffic carrying capacity(TCC)of road section under signal control,the TCCs of road including road section and signalized intersection were defined considering the factors,such as spatial attributes of road section,queuing vehicles,traffic entering and exiting flow,and traffic control scheme.The calculation methods for the longest carrying time and the maximum carrying number of vehicles were derived,and an optimization model of TCC at the signalized intersection was established.A real-time interactive simulation experimental platform based on VISSIM and PYTHON was built.The calculations and simulations of the signalized intersection under two different cases of the stable flow and the dynamic flow were carried out.The results show that compared with the existing isosaturation timing method,the maximum carrying time of the two cases of the optimization model is increased by about 23.0%and 55.1%,respectively.And the maximum deviation between the simulation and calculation results is within 12.4%,thus verifying the validity of the optimization model.The risk of queuing overflow at the upstream of an oversaturated intersection is reduced by extending the maximum carrying time.

关 键 词：交通工程 交通承载能力 信号控制 排队长度 绿信比 

分 类 号：U491.4[交通运输工程—交通运输规划与管理]