Simulation of pedestrian evacuation with affected visual field and absence of evacuation signs

A simulation of pedestrian evacuation in room with affected visual field and absence of the direction of evacuation signs will be presented based on cellular automata (CA) in this paper. Evacuation room is divided into exit-visible area and exit-invisible area by pedestrian visual field radius. Two basic dynamic parameters in Dynamic Parameters Model (DPM) are used to simulate the varied movement characteristics of pedestrian in different evacuation areas including normal evacuation movement and blind random movement. The effect of pedestrian visual field radius on evacuation time is studied without evacuation signs on wall. It is observed that evacuation time is dependent not only on the pedestrian visual field radius but also on the initial density. It is also found that the evacuation time will tend to the level and remain unchanged with visual field radius rising.