文档介绍：第 41 卷第 4 期中南大学学报(自然科学版) Vo l .41 No .4
2010 年 8 月 Journal of Central South University (Science and Technology) Aug. 2010
基于元胞自动机的双车道环岛交通流特性研究
史峰,周文梁,刘芬芳,邓连波
(中南大学交通运输工程学院,湖南长沙,410075)
摘要:针对以元胞自动机模型模拟单车道环岛交通行为推断多车道环岛交通流特性的局限性,通过分析双车道
环岛上车辆在自由流下的期望行驶路线、在非自由流下的期望换道临界位置和极限位置,描述双车道环岛上车辆
的换道决策,建立双车道环岛的元胞自动机模型。数值模拟分析结果表明:环岛总延误时间与环岛限速、车辆驾
驶员熟练程度以及车辆左转概率有关,同时也受环岛周长的影响;在其他因素不变的情况下,若环岛周长越小、
车辆限速越大、车辆左转概率越小以及驾驶员熟练程度越高,则环岛总延误时间越小。
关键词:环岛交通流特性;元胞自动机;双车道环岛
中图分类号:U491 文献标志码:A 文章编号:1672−7207(2010)04−1616−07
Two-lane roundabout traffic flow characteristics based on
cellular automaton
SHI Feng, ZHOU Wen-liang, LIU Fen-fang, DENG Lian-bo
(School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China)
Abstract: Considering the limitation of traffic characteristics of multi-lane roundabout induced by studying the traffic
characteristics of one-lane roundabout using cellular automaton, a cellular automaton model of the two-lane roundabout
was constructed, through analyzing the expected drive line of two-lane roundabout under free flow and the expected
critical position and limit position of lane changing under non-free flow. The results show that the total delay time is not
only affected by the limit velocity of roundabout, drivers’ skillful level and left-hand bend probability, but also related to
the roundabout size. Wi