Transportation Network Vulnerability Enhancement Study

Abstract

Emergency events can easily cause disruptions or delays in the transportation network, causing performance to decline. Enhancement of the vulnerability of transportation networks contributes to the ability of networks to respond to emergencies. To analyze the multi-layer network’s structure and vulnerability, this paper proposes a transportation network vulnerability assessment model approach taking the highway, high-speed railway, and civil aviation networks in the southwest region of China as case studies. The analysis shows that the vulnerability of the high-speed railway and civil aviation framework could be poor. The highway and high-speed railway framework connect most cities in the two-layer transportation network. However, three-layer transportation networks show better vulnerability. When the disruption proportion reaches 29.74%, the three-layer transportation network collapses into a single-layer or two-layer network. But the network maintains a certain level of operation. This paper provides reference suggestions for the construction of urban traffic terminal expansion. In the southwest region of China, it is necessary to build a three-layer transportation network and accelerate the construction of a synergistic aviation-high speed railway-highway intermodal transportation system.