基于改进型元胞自动机模型的双车道公路交通特征分析  

Traffic Characteristic Analysis of Two-lane Highway Under the Improved CA Model

作　　者：唐夕茹[1] 陈艳艳[1] 

机构地区：[1]北京工业大学交通工程重点实验室,北京100124

出　　处：《北京工业大学学报》2014年第1期1-10,共10页Journal of Beijing University of Technology

基　　金：国家"973"计划资助项目(201CB723303)

摘　　要：根据双车道公路的微观交通特征,考虑车辆驾驶员的不同驾驶特点,将驾驶员特性与车型结构引入CA模型,建立了新的双向双车道CA模型.通过计算机模拟,分析了驾驶员性格、车型比例、双向流量比例等因素对双车道公路车流密度、速度、速度波动性和流量等交通特征的影响.结果表明:路段平均车速取决于小车比例,且在小车比例为0.7时速度波动最明显,同时增加激进型驾驶员的比例能小幅提高路段平均车速,但会引起更大的速度波动.In order to fine the traffic characteristics of the two-lane highway, we built a new two-lane CA model, which had considered the two-lane highway microscopic driver behaviors. The differences in driver behavior, car percentage and flow ratio were taken into account to investigate the parameters of traffic characteristics such as road density, average speed, traffic flow and so on. Simulation results show that the new model can reproduce some complicated traffic phenomena, such as the asymmetrically lane- changing. In addition, we got the conclusions that, first, road average speed was depended on the car ratio; second, the fluctuation came to the maximum when the car ratio was 0.7; third, the increase of adventurous drivers can increase the whole road average speed as well as the fluctuation of the traffic speed.

关 键 词：交通流 双车道公路 元胞自动机 数值模拟 

分 类 号：U491[交通运输工程—交通运输规划与管理]