Research on spatio-temporal cascade failure model of urban road network

Sudden natural disasters such as rainstorms and geological disasters will have a significant impact on the road network. The failure of road networks caused by disasters has spatiotemporal characteristics, and in-depth research on the spatiotemporal cascading failure model of road networks under disaster conditions is of great significance for ensuring road network traffic and improving management. This article uses the L-space method to abstract the road network, and combines complex network indicators such as node degree, node betweenness, and degree indicators to analyze the spatiotemporal distribution characteristics of different nodes. The coupled image grid method is used to analyse the cascading failure phenomena of key nodes in urban road networks under different external disturbances and road topology coupling strengths. Finally, taking the urban road network in Xi'an as an example, the correctness of the proposed method is demonstrated by comparing the simulation experiment results with the actual road network failure results.