关键词: 非常态事件, 城市交通, 城市管理

Abstract: On the basis of the concept of emergency accidents， this paper analyses the impacts caused by the emergency accidents on urban traffic, which includes transportation demand, travel behavior and the reliability of road network. Aiming at the occurrence of the emergency accidents, the author puts forward the suggestion that the traffic information collection as well as traffic flow guidance and control should be strengthened. Moreover, the estimation of real-time traffic conditions and the forecasting of road network traffic flow are very important. Based on the construction of Urban Traffic Emergency Management System (UTEMS) and the analyses of its function flow, it is significant to establish an urban traffic emergency management mechanism. In the end, the paper illustrates the kind of strategy that the urban traffic management department should adopt scientifically under the influence of the emergency accidents both from theoretical and technical views. It has also shown that research on unban traffic under the influence of the emergency accidents, which improves the capability of disposing emergency accidents as well as reducing the effect of post-accidents, is essential for protecting city safety and society stability.

Key words: emergency accidents, urban traffic, city management