Robustness Analysis of Urban Public Transportation Network Based on Accessibility Index

With the accelerating process of China's urbanization and the gradual expansion of the city scale, the robustness and reliability of urban road traffic networks are particularly important. This paper took the public transportation network in Heping District of Shenyang as the research goal, and obtained the important public transport stations as the research object. The bus stations were used as the nodes of the complex network to analyze the degree ,the degree distribution, the clustering coefficient and the average path length. Node attacks included random attack, degree attack and betweenness attack. This paper analyzed the robustness of the network by combining the changes of network efficiency ratio and accessibility index. The research results show that the accessibility index can be used to analyze the robustness of complex networks, and the public transportation network has good robustness against the random attack, poor resistance against the deliberate attack, and degree attack is more destructive than betweenness attack.