人群的聚集和流动通常并不会直接导致事故发生,搭载某些特定环境和条件,大人流的集聚和失控就可能引发城市公共安全重大风险,应引起足够重视。发生在2014年12月31日的上海外滩拥挤踩踏事件表明,大人流已成为中国城市运行常态,而一旦发生危险,后果不堪设想。近日,上海“城市大人流风险管理”课题组发布《城市大人流风 The gathering and flowing of people usually do not lead to the accident. Carrying certain special environment and conditions, the agglomeration and uncontrollability of adults may lead to the serious risk of urban public safety, which should be paid enough attention. The stampede of Shanghai Bund on December 31, 2014 shows that adults flow has become the norm in the operation of Chinese cities and the consequences would be disastrous in the event of danger. Recently, Shanghai “Urban adult risk management ” task force released "urban adult flow