Cellular automation model of pedestrian evacuation considering obstacle crossing behaviors

In order to study influence of obstacle crossing behaviors on pedestrian evacuationꎬ a cellular automation model of evacuation considering such behaviors is established. Concept of risk degree was introduced in the model and used to define surmountable obstacles and unsurmountable obstacles. And through two different neighborhoodsꎬ crossing obstacles was realized. Thenꎬ a scenario of evacuation after earthquake was created to simulate evacuation process with different initial pedestrian density and 第 4 期 宋英华等: 考虑跨越障碍物行为的元胞自动机模型 proportion of pedestrians crossing obstaclesꎬ and influence of initial densityꎬ obstacle crossing behaviors and pedestrian ratio on evacuation process was analyzed. The results show that obstacle crossing behaviors make simulation process more consistent with pedestrian's movement mode in reality and eliminate some obstructions caused for them to detour obstacles. Increasing initial pedestrian density has less effect on scenes of crossing obstacles than on detouring obstacles. When they are faced with surmountable obstaclesꎬ the higher the proportion of pedestrians crossing obstacles isꎬ the shorter time evacuation takes.