Highly crowded massive people with high mobility at urban public place usually cause accident of high casualty due to swarm and jostlement resulted in negative social impact.

• 城市公共场所人群高度聚集、流动性大,紧急状态时常发生群死群伤的拥挤踩踏事故,造成大量人员伤亡和恶劣的社会影响。