An Improved Cellular Automaton Model for Urban Walkway Bi-directional Pedestrian Flow

In order to describe traffic operation characteristics of bi-directional pedestrian flow in urban pedestrian walkways and work for walking safe, authors proposed an improved cellular automaton bi-directional pedestrian flow model. This model takes into account many basic pedestrian behaviors, forward move, side stepping, position exchange, lateral-move and step back, and, using MOORE Neighborhood method, provides rules of pedestrian movement combining with the characteristics of walking process , for instance, intelligent, flexible and complicated. With computer simulation, authors studied the influence of position exchange and lateral-move on the model, the parameters of bi-directional pedestrian flow such as velocity and volume were discussed also. The results demonstrated that position exchange and lateral-move make the pedestrian behavior more comprehensive; the model could be better applied to simulate the high-density bi-directional pedestrian flow and provided reasonable traffic operation parameters of bi-directional pedestrian flow.