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.
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 pha^e 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.
出处
《计算物理》
EI
CSCD
北大核心
2007年第4期499-504,共6页
Chinese Journal of Computational Physics
关键词
元胞自动机
限速
交通流
相分离
cellular automaton
limited velocity
traffic flow
phase separation
