The risks borne by road networks continue to increase, and some weak links will have a great impact on the entire network due to interruptions and congestion. Research on the vulnerability of road networks has gradually attracted attention. Firstly, the vulnerability of road transportation network is expounded, and the influencing factors of urban road network vulnerability are analyzed based on the sudden power outage scenario. The interpretative structure model is used to clarify the correlation structure between the influencing factors, as the result shown, the key influencing factors of road network vulnerability are road network topology, road capacity and road network traffic flow. Secondly, considering the key influencing factors of road network vulnerability, the loss of generalized travel cost is selected as the quantitative evaluation index of vulnerability based on the exposure degree theory. The node deletion method in the assessment of traffic impact is introduced into the assessment of road network vulnerability, and the consequences of road link failure in the network are analyzed to calculate the road link vulnerability. The BPR function proposed by the US Highway Bureau is used as a road resistance function to analyze the operation of the road network for traffic distribution. Finally, using the example road network to calculate, the vulnerability of key road links on the road network are analyzed through theoretical research and method construction, and suggestions for reducing the vulnerability of rural road network are proposed.

CICTP