曼哈顿式城市系统中的交通流
Traffic flow in a Manhattan-like urban system
摘要：
本文提出了一种曼哈顿式城市系统车辆交通的元胞自动机模型。模型中考虑了起点-终点的出行和交通信号灯的影响。该系统表现出三种不同的状态，即，移动状态、饱和状态和全局死锁状态。采用网格粗化方法，研究了运动状态和饱和状态下的车辆分布。有趣的结构（例如，像一个风车，像一件T恤，像一个Y）已经被揭示出来。系统从饱和态到全局死锁态的过渡过程中存在亚稳态。研究了先进的出行者信息系统（ATIS）、交通灯周期和交通灯切换策略的影响。
英文摘要：
In this paper, a cellular automaton model of vehicular traffic in Manhattan-like urban system is proposed. In this model, the origin-destination trips and traffic lights have been considered. The system exhibits three different states, i.e., moving state, saturation state and global deadlock state. With a grid coarsening method, vehicle distribution in the moving state and the saturation state has been studied. Interesting structures (e.g., windmill-like one, T-shirt-like one, Y-like one) have been revealed. A metastability of the system is observed in the transition from saturation state to global deadlock state. The effect of advanced traveller information system (ATIS), the traffic light period, and the traffic light switch strategy have also been investigated.
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