计算物理 ›› 2007, Vol. 24 ›› Issue (4): 499-504.

• 论文 • 上一篇    

速度限制对交通流的影响

杨先清1, 张伟1, 仇康1, 孙大鹏1, 赵跃民2   

  1. 1. 中国矿业大学理学院, 江苏 徐州 221008;
    2. 中国矿业大学化工学院, 江苏 徐州 221008
  • 收稿日期:2006-04-17 修回日期:2006-12-20 出版日期:2007-07-25 发布日期:2007-07-25
  • 作者简介:杨先清(1966-),男,江苏铜山,教授,博士,从事软凝聚态物理研究,中国矿业大学理学院221008.

Effects of Limited Velocity on Traffic Flow

YANG Xianqing1, ZHANG Wei1, QIU Kang1, SUN Dapeng1, ZHAO Yuemin2   

  1. 1. College of Science, China University of Mining and Technology, Xuzhou 221008, China;
    2. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221008, China
  • Received:2006-04-17 Revised:2006-12-20 Online:2007-07-25 Published:2007-07-25

摘要: 运用元胞自动机模型研究单车道路面上设立限速区对交通流的影响.计算机模拟结果显示,在交通流与密度的基本图中存在饱和交通流量,其大小取决于限速区的最大速度.限速区的设立导致不同相的分离.在确定性的模型中,当车辆密度较低时,存在两种不同的自由流相;而当车辆密度较高时,出现最大交通流相和自由流相.在随机模型中,车辆密度较高时,出现最大交通流相-堵塞相-自由流.对交通流以及临界密度等量给出一些解析结果.

关键词: 元胞自动机, 限速, 交通流, 相分离

Abstract: Effect of limited velocity on traffic flow is studied with cellular automaton.The simulation indicates that a saturated traffic flow determined by limited speed exists.The limited velocity results in various phase separations.In a fixed model,as the car density is low,two free-flow phases occur.As the density is high,a separation of maximum traffic flow phase from a free flow phase is observed.In an random model,as the density is high,a maximum flow-jamming-free flow appears.The traffic flow and critical density are given.

Key words: cellular automaton, limited velocity, traffic flow, phase separation

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