摘要：The scope of traffic incidents impacts the performance of traffic incident impact assessment. The inadequate impact scope of the traffic incident will weaken the performance of the traffic incident impact assessment and increase the cost of travel time and payment. This article mainly analyzes road enclosure method, plume model method, and spherical extrapolation method to determine the scope of impact of traffic incident. Advantages and limitations of these three models are presented. Based on these analyses, some improvements are proposed on the basis of the existing situation.
