With the speed up of the process of urbanization in China, the population of cities has increased sharply. Traffic problems in many cities of China have become more and more serious. On the other hand, kinds of emergency events occurred more and more frequently in big cities. We have entered an emergency high frequency period. For big cities, how to deal with the emergency events calmly from the point of view of evacuation ability and traffic control system? It is a big challenge that urban mana...
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