基于改进CTM模型的城市快速路交通流仿真  

Urban expressway traffic flow simulation based on improved CTM model

作　　者：林琴[1] 龙科军[1] LIN Qin;LONG Ke-jun(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,湖南长沙410114

出　　处：《长沙理工大学学报（自然科学版）》2018年第4期52-58,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51678076)

摘　　要：为了探讨城市快速路交通流特征,针对快速路的4个模块进行了交通流仿真。以经典元胞传输模型(CTM)为基础,根据相邻元胞间流量传输相等的基本原理,引入元胞长度参数,推导出了元胞间流量传输公式,由此提出改进的元胞传输模型。利用改进元胞传输模型对城市快速路交通流进行仿真,主要包括道路环境和交通环境两个方面,即上匝道之间的间距以及主线和匝道流量比,仿真包括构成城市快速路的4个模块:基本路段、合流区、分流区以及交织区,以车辆延误作为分析指标。仿真结果表明,基本路段和分流区的延误增加量一致,合流区和交织区的延误增加量一致。In order to discuss the characteristics of urban expressway traffic flow,traffic flow simulation was performed for four modules of the expressway.Based on the classical Cell Transmission Model(CTM),according to the basic principle of equal flow transmission between neighboring cells,cell length parameters were introduced and the formula for intercellular communications was deduced.An improved cellular transmission model was proposed.The use of the improved cell transmission model for urban expressway traffic flow simulation mainly includes two aspects of road environment and traffic environment,namely,the distance between the upper roads and the ratio of the main line and the tunnel flow.And the simulation includes four modules that constitute the urban expressway:Basic road section,Confluence area,Triage area,and Weaving area,and use vehicle delay as an analysis indicator.The simulation results show that the increase of delays in the Basic road section and the Triage area is the same,and the increase in the delay in the Converging area and the Weaving area is the same.

关 键 词：城市快速路 元胞传输模型 改进型 基本路段 合流区 分流区 交织区 

分 类 号：U491[交通运输工程—交通运输规划与管理]