摘要
准确模拟交叉口处车辆运行,对交叉口信号配时优化、交叉口设计等具有重要意义。交叉口排队建模可以较为准确地模拟车辆到达及交叉口服务过程。位相型分布(PH分布),可以无限逼近任意到达和服务规律,车辆到达交叉口时交叉口处容量有限,且车辆通过交叉口时,通过时间具有状态相关性。本文考虑以上三点,建立PH/PH(n)/C1/C2的交叉口排队模型,将城市交叉口抽象为离散事件仿真模型,根据PH分布随机变量计算车辆到达过程和交叉口服务过程。文中提出的离散仿真模型充分考虑了车道服务的状态相关性,并利用Simulink构建了考虑状态相关服务的城市交叉口离散事件仿真模型。仿真结果表明考虑状态相关服务的离散事件仿真,可以较好地反映出交叉口处车辆通过的周期性,较为客观地反映交叉口车辆运行情况。
Accurate simulation of vehicle operation at intersections is of great significance in signal-timing optimization and intersection design.The queuing model of an intersection can accurately simulate the arrival of vehicles and the services of the intersection.First,Phase-Type(PH)queuing model can proximally access arbitrary reaching laws and service laws.Second,when vehicles arrive at an intersection,the capacity of the intersection is limited.Third,when a vehicle passes through an intersection,the passing time is state-dependent.Considering these three points,a queuing model of PH/PH(n)/C1/C2 is established.The intersection is translated into DES(Discrete-Event Simulation)models,in which the arrival and service processes of the vehicles are based on the PH random variations.The proposed DES model fully considers the state-dependence of lane service.Simulink is used to build the simulation model,and finally,the DES model of an intersection considering state-related services is established.The results show that the proposed model can accurately represent the periodicity of vehicles passing through an intersection and objectively reflect the vehicular traffic situation.
作者
齐心
胡路
赵斌
唐晓佩
QI Xin;HU Lu;ZHAO Bin;TANG Xiao-pei(Tianjin Municipal Engineering Design&Research Institute,Tianjin 300051,China;School of Transportation and Logistics Southwest Jiaotong University,Chengdu 611756,China;National Engineering Laboratory of Integrated Transportation Big Data Application Technology,Chengdu 611756,China)
出处
《交通运输工程与信息学报》
2020年第1期133-145,共13页
Journal of Transportation Engineering and Information
基金
成都市科技项目(2017-RK00-00362-ZF)
西南交通大学研究生学术素养提升计划(科创竞赛培育)专题项目(2019KCJS46)
关键词
交通工程
离散仿真
排队系统
城市交叉口
PH分布
traffic engineering
discrete-event simulation
queuing system
urban intersection
Phase-Type distribution