基于改进型元胞自动机模型的双车道公路交通冲突分析  

Analysis of Traffic Conflict in Two-lane Highway Based on Improved CA Model

作　　者：唐夕茹[1,2] 徐丽萍[1,2] 

机构地区：[1]北京城市系统工程研究中心,北京100035 [2]城市交通节能减排检测与评估北京市重点实验室,北京100035

出　　处：《公路交通科技》2016年第3期109-115,共7页Journal of Highway and Transportation Research and Development

基　　金：北京市科学技术研究院创新团队计划课题项目(IG201303C1);北京市科学技术研究院科技创新工程项目(PXM2015_178215_000008);北京市科学技术研究院青年骨干计划项目(201511)

摘　　要：根据双向双车道公路的交通特征及其仅能借对向车道完成超车的道路条件,考虑车辆驾驶员的不同性格特点和双车道公路车型复杂的特性,将驾驶员特性与车辆动力性能引入元胞自动机模型,建立了改进型双向双车道元胞自动机模型。通过计算机模拟,分析了流量对称和非对称条件下双车道公路路段上不同车辆到达系数、小车比例、驾驶员比例、道路流向比例等因素对双车道公路交通冲突的影响,得出了车辆到达系数、小车比例、驾驶员比例、道路流向比的量化参数与冲突数的相互关系。结果表明:公路交通冲突次数与车辆到达系数、流向比、小车比例、激进型驾驶员比例都有较强的正相关性,相关分析的拟合优度为0.904;在公路交通冲突的影响因素中,车辆到达系数对冲突数的影响程度最大,其次为小车比例。According to the traffic character of two-lane highway and the road condition for overtaking using opposing lane, considering divers＇ personalities and complexity of vehicles on two-lane highway, by introducing divers＇ personalties and the dynamic performance of vehicles, the revised two-lane cellular automaton model is established. Using the computer simulation, the interrelations among different vehicle arrival coefficients, ratio of small vehicles, ratio of different driver types, quantization parameter of flow direction rate on traffic conflict on two-lane highway under traffic symmetric or asymmetric traffic conditions are analyzed, thus the interrelations among arrival coefficient, proportions of small vehicles and drivers, quantization parameter of flow direction rate and number of conflicts are obtained. The result shows that （ 1 ） number of traffic conflicts has a positive relationship with arrival coefficient, flow direction rate, proportion of small vehicles, and proportion of aggressive drivers, the goodness of fitting for the relevant analysis is 0. 904 ; （2） among all these factors, has the greatest impact on number of traffic conflicts, and the impact of proportion of small vehicles is in the next place.

关 键 词：交通工程 交通冲突 数值模拟 双车道公路 元胞自动机 

分 类 号：U491.265[交通运输工程—交通运输规划与管理]