Abstract: Considering the effect of desk and chair on the pedestrian moving velocity,a new cellular automaton evacuation model with seat andaisle regions is proposed,and the evacuation time with the occupant density,different exit positions and internal layout are analyzed.Simulation results show that:when the exit is in the side,it should not be directly opposite to the desks andseats;it is very beneficial when the aisle is close to the exit side of the wall;and the number and width of the aisle will effect on the evacuation time.In order to achieve theoptimal evacuation efficiency,the internal layout should make pedestrians leave the seating region more quickly and avoid the congestion with the formation of density in the exit.

Key words: pedestrian flow, cellular automata, pedestrian evacuation, layout