考虑服务水平可靠度的单点交叉口信号配时研究  

Level of service reliability for the signal timing of single point intersection

作　　者：刘刚[1] 况爱武[1] 郑慧敏[1] LIU Gang KUANG Aiwu ZHENG Huimin(School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China)

机构地区：[1]长沙理工大学交通运输工程学院,长沙410114

出　　处：《交通科技与经济》2017年第2期39-43,共5页Technology & Economy in Areas of Communications

基　　金：湖南省科技计划项目(2015SK2012)

摘　　要：为实现单点交叉口在满足一定服务水平可靠度需求下的信号控制方案,使交叉口信号配时更合理、更符合实际,使用连续型概率分布模型分析刻画交叉口进口道车辆到达率的随机性;在考虑车辆到达率随机性的基础上,研究考虑服务水平可靠度的信号配时模型。文章把服务水平可靠度作为信号控制交叉口可靠性指标,研究其与车辆到达率随机性的关系,借助信号配时约束条件,建立信号配时模型;利用概率论方法,推导给定服务水平可靠度指标下的周期时长和绿灯时间的计算公式。仿真验证表明,该计算方法能实现交叉口在满足一定服务水平可靠度需求下信号控制方案,达到使交叉口信号配时更加合理、更有效、更符合实际的效果。In order to realize the signal control scheme of single point intersection to meet the demand of service level, and make the intersection signal more reasonable and realistic, this paper proposes a continuous probability distribution model to analyze the arrival rate of the entrance channel. On the basis of the randomness of vehicle arrival rate, the reliability of level of service is considered in the signal timing model which is researched in this paper. The level of service reliability is taken as the reliability index of signal control intersection. According to the definition of level of service reliability at intersection, the relationship between the level of service reliability and the randomness of vehicle arrival rate is studied. By means of signal timing constraints, the signal timing model is built. Using the method of probability theory, this paper draws the calculation formula of the cycle length and green time. Simulation result shows that the proposed method can realize the signal control scheme of single point intersection to meet the demand of service level, and make the signal timing of single point intersection more reasonable, effective and realistic.

关 键 词：服务水平可靠度 单点交叉口 信号配时 车辆到达率 

分 类 号：U121[交通运输工程]