基于元胞自动机的开放型城市街区交通流模拟

The traffic flow simulation around the opening residential community on the theory of cellular automaton

科学合理的交通流疏导是衡量可持续性发展城市街区尤其是开放型街区紧凑度的重要考量因素,提出了一种从强度、连接性和复杂度3个方面建立开放型街区道路通行的指标体系,运用元胞自动机算法原理对交通流模拟进行优化。该算法根据交通规则和司机的行为倾向对NaSch模型的车辆行驶规则进行了改进,加入了交通灯、街区内部内行驶限制等规则,能够描述出交通堵塞的物理效应,准确地模拟出排队形成、排队消散和路口延迟等交通动力学特性。

The scientific and reasonable traffic grooming is one of the most important measures for the compactness of the sustainable city district especially the opening residential community.We propose an index system of the traffic flow established from three aspects of strength,connectivity and complexity,and use the cellular automata algorithm principle to optimize traffic flow simulation.Based on the traffic rules and driver behavior tendency,the algorithm improves the ve hicle driving rules of NaSch model by adding traffic lights and driving limit rules inside the block.Results show that it can describe the physical effects of traffic jams and accurately simulate the traffic dissipation dynamics such as queue formation,queuing delay and intersection.