基于公交优先的单点交叉口车道信号协同配置模型  

An Integrated Lane-marking and Signal Timing Model for Isolated Intersection Based on Transit Priority

作　　者：窦慧丽[1,2] 马万经[2] 王国华 DOU Hui-li;MA Wan-jing;WANG Guo-hua(Shcool of Rail Transit,Zhejiang Business College,Hangzhou Zhejiang 311112,China;School of Transportation Engineering,Tongji University,Shanghai 201804,China;Zhejiang Traffic Planning,Design and Research Institute Co.,Ltd.,Hangzhou Zhejiang 310030,China)

机构地区：[1]浙江交通职业技术学院轨道交通学院,浙江杭州311112 [2]同济大学交通运输工程学院,上海201804 [3]浙江省交通规划设计研究院有限公司,浙江杭州310030

出　　处：《公路交通科技》2019年第11期75-82,共8页Journal of Highway and Transportation Research and Development

基　　金：国家高技术研究发展计划(八六三计划)(2008AA11Z205);上海市科委项目(15DZ1100800)

摘　　要：为了提高公交车在交叉口的通行能力,降低公交车的拥堵,对单点交叉口的车道信号协同优化配置问题进行了研究,建立了基于公交优先的、以所有通过车辆所承载的乘客数最大为优化目标的单点交叉口车道信号协同配置模型。综合考虑公交车和私家车两种车型在能力占用、承载人数和输送功能等方面的差异,以交叉口各方向的交通需求、车道饱和率、公交车和小汽车荷载数等为输入参数,以交叉口公交专用道、普通车道功能(左转,直行,直右等)设置、信号周期、相位时长等为优化变量,以交叉口通过公交车小汽车荷载总乘客数的最大备用能力为目标,构建了单点交叉口公交被动优先的线性规划模型。并以实际交叉口为例,采用Matlab软件分别以通过总乘客数和总车辆数为目标的两种模型进行了算例分析。结果表明:以交叉口通过总乘客数为优化目标,能保障交叉口同时获得更大的乘客和车辆通过能力。灵敏度分析发现,公交比例越低,公交专用道饱和度越高时,通过的乘客数越大;当公交载客量大时,采用通过乘客数为目标来优化车道功能和信号配时,能显著提高乘客通过能力,公交载客比例对车辆通过能力则无显著影响。In order to improve the traffic ability and reduce the congestion of buses at intersection,the problem of collaborative optimal configuration of lane markings and signal timing for isolated intersections is studied.The collaborative configuration model of lane markings and signal timing for isolated intersections based on bus priority with the objective of maximized passengers in all of the passing vehicles is established.Comprehensively considering the differences of cars and buses,which include the capacity,passengers and the function,taking the demand of all directions of intersection,saturation rate of lane,passenger numbers of bus and car and so on as the input parameters,taking the exclusive bus lane and the ordinary lane function(turn left,go straight,turn right,etc.)at the intersection,signal cycle and phase length as the optimization variables,taking the maximum capacity of total passengers of cars and buses as the objective,a linear programming model of bus passive priority at single-point intersection is established.The 2 models aiming at the total number of passing passengers and the total number of passing vehicles are used with Matlab software for example analysis based on 2 actual intersections.The result shows that taking the total number of passing passengers at intersection as the optimization objective can ensure that the intersection can obtain greater passenger and vehicle traffic ability at the same time.The sensitivity analysis shows that(1)the lower the proportion of the bus,the higher the saturation of the exclusive bus lane,and the larger the number of passing passengers;(2)when the bus capacity is large,the passenger traffic ability can be significantly improved by taking the number of passing passengers as the objective to optimize the functions of the lanes and the signal timing,while the proportion of bus capacity has no significant influence on the traffic ability of vehicles.

关 键 词：交通工程 信号配置模型 线性规划 单点交叉口 公交专用道 

分 类 号：U491.4[交通运输工程—交通运输规划与管理]