基于元胞自动机的对向行人交通流仿真研究

基于元胞自动机对对向行人交通流进行仿真研究. 模型利用四个动态参数反映行人移动区域和其视野范围内的实际情况，从而决定行人的行为选择，行人可以根据自身周围的情况选择前进、后退、等待、左右移动、交换位置等行为. 仿真研究不同方向比例与不同系统规模的对向行人流的速度-密度、流量-密度关系. 研究结果表明，系统存在相位转换和临界密度，方向比例和系统规模对行人流的速度-密度、流量-密度关系曲线的形状和系统临界密度值有一定的影响. 关键词： 元胞自动机 对向行人流 动态参数 临界密度

Simulation of bi-directional pedestrian flow based on cellular automata model

Simulations of bi-directional pedestrian flow with different direction splits and system sizes are presented based on cellular automata (CA) in this paper. It is well known that pedestrian movement is more flexible and adaptive to the dynamic conditions than vehicular flow, so four dynamic parameters are formulated to simplify tactically the decision-making process of pedestrians, which can reflect the pedestrian's judgment on the surrounding conditions and decide his her choice of action. The relationships of velocity-density and volume-density at different direction splits and on the different size system are studied and analyzed. It is found that there are phase transitions and a critical density point in the model and the relationships of velocity-density and volume-density are different in different phases. And the ratio of direction splits and system size affect the shapes of velocity-density curve, volume-density curve and the value of critical density point.