中文摘要：

遵循科学性、系统性、可比性和可操作性的原则,确定了以事件严重程度、环境承载程度和应急处置能力为信息源的城市交通突发事件评级指标;应用Vague集理论,建立了城市交通突发事件综合评级体系,用于对交通突发事件的应急风险进行评级识别和管理;最后,通过实际案例说明了评级过程与应对策略。

英文摘要：

By following the principles of scientificity, systematicness, comparability and operability,and taking the in- cident severity, environmental bearing capacity and emergency disposal ability as the information source, authors pro- posed an urban traffic emergency-based rating indicator ,and then evaluated the urban traffic emergency using vague set so as to identify and manage the traffic emergency risk rating. Finally,a practice was introduced to illustrate the rating process and corresponding strategy.