智能交通系统的元胞自动机交通流模型  

Cellular automaton traffic flow model considering intelligent transportation system

作　　者：葛红霞[1] 祝会兵[1,2] 戴世强[1] 

机构地区：[1]上海市应用数学和力学研究所,上海大学,上海200072 [2]宁波大学建筑工程与环境学院

出　　处：《物理学报》2005年第10期4621-4626,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:19932020;10202012);教育部高等学校博士学科点专项科研基金(批准号:20040280014)资助的课题.~~

摘　　要：在Nagel_Schreckenberg(NS)模型的基础上,提出一种可应用智能交通系统(ITS)信息的新的交通流元胞自动机模型.其中考虑了有效间距及刹车灯的作用,并引入了可变安全间距的新概念.数值模拟表明对于这种改进的ITS元胞自动机模型,道路交通量有了显著提高,体现了智能交通的优越性——有效地扩大交通流量,减少阻塞生成.当考虑快车和慢车的混合交通流时,发现即使少量的慢车也会导致交通流量大幅度下降,说明了严格实施快慢道行驶的必要性.A novel cellular automaton model for traffic flow on highway is proposed considering Intelligent Transportation System （ITS）. Based on the Nagel-Schreckenberg model （NS for short）, it includes effective gap and brake light. Moreover, a novel concept about the variable security gap is introduced. The simulation shows that the road capacity of the modified ITS cellular automaton model is higher than the measured data on certain highway, further indicating the important role of ITS,enlarged traffic flow and suppressed traffic jam. The mixed traffic flow related to two different vehicles＇ velocity is studied. The simulation shows even few slow vehicles will lead to drastic decrease of traffic flow, which demonstrates the necessity to implement strictly special fast lane.

关 键 词：交通流 智能交通系统(ITS) 元胞自动机模型 刹车灯 可变安全间距 交通流模型 安全间距 交通流量 道路交通量 混合交通流 

分 类 号：U491.112[交通运输工程—交通运输规划与管理]