随机化交通灯的二维元胞自动机交通模型<sup>*</sup>

随机化交通灯的二维元胞自动机交通模型^*

基金项目: * 上海市自然科学基金

1.
School of Systems Science and Systems Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P.R. China;
2.
Physics Department, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P.R. China;
3.
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, P.R. China;
4.
Shanghai Institute of Applied Mathematic and Mechanics, Shanghai University, Shanghai 200072, P.R. China

摘要: 元胞自动机交通模型以简单的规则反映交通系统中的多种因素,可以分析各种交通现象,且可在计算机上方便、高效地运作.Biham-Middleton-Levine模型(BML模型)实现了二维交通问题的元胞自动机模型的模拟研究.本文对BML模型作了改进,解除了该模型中关于交通灯同步变化的限制.在新模型中,每个路口的交通灯可以自由选定起始工作时间和变化节奏,于是可以更全面、准确地反映交通灯对交通系统性能的影响.本文还对新模型中出现的若干新效应作了解释.
- 元胞自动机 /
- 交通模型 /
- 交通灯 /
- 相变
Abstract: Cellular automaton traffic models can include various facotrs in traffic systems and the corresponding computational simulations are rather simple and effective.The Biham-MiddletonLevine model (BML model) facilitates the simulation of two-dimensional traffic flow problems via the cellular automaton models.In this paper,the BML model is improved by removing its limitation of synchronized change of traffic lights.In the new model,the traffic light at each crossing could arbitrarily change its starting time and tempo of variation,and hence the model could more realistically describe the influence of traffic lights on the performance of traffic systems.Some new effects appearing in the new model are also elucidated.
- cellular automata /
- traffic model /
- traffic light /
- phase transition

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