Abstract
Public evacuation preparation exerts an important impact on overall evacuation efficiency during regional evacuations. Early warnings often delay the occurrence of chemical accidents. Studying the characteristics of public evacuation preparation in such accidents will help develop better evacuation strategies considering the actual public response. In this work, the characteristics and factors influencing public evacuation preparation behaviors were analyzed by examining an evacuation case in China. The results indicated that the probability distribution of public's evacuation preparation time during a regional evacuation conforms to a Weibull distribution regardless of whether or not evacuation warnings were received. An estimation model of the traffic flow loading rate in a regional evacuation was then proposed on the basis of this finding. The results of this research can provide a reliable reference for evacuation modeling or logistics optimization for future incidents.
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