Research on Identification Method of Key Road Sections in the Road Network under Disaster Situation

Road networks can be abstracted into complex topological structures, where road sections and intersections represent edges and nodes in the topological structure. The location of each road section and the function it plays in the whole road network are different. Some road sections are easily damaged by the impact of emergencies, and these damaged sections have a great impact on the capacity and service level of the entire road network. In this paper, this kind of road sections is defined as the key road sections in the road network, and a key road section identification method combining vulnerability and importance analysis is presented.