Parametric Analysis of Roadway Infrastructure Vulnerability to Disruptions: Fid-Bau Portal

Parametric Analysis of Roadway Infrastructure Vulnerability to Disruptions

Dehghani, Mohammad Saied / Flintsch, Gerardo / McNeil, Sue

In the last few years, research studies have assessed the vulnerability of roadways to disasters and extreme events. However, in many of these studies the impact of the endogenous characteristics of the roadway network (such as the condition of the roads, and existing travel on the network) on roadway system vulnerability has not been adequately investigated. This paper investigates how condition of the roads, travel demand, travel patterns, and the position of links within the network affect the dynamics of vulnerably of the roadway systems. The method is applied to the Istanbul highway system and provides a probabilistic assessment of the vulnerability of the network using travel time and efficiency. The findings show that travel time vulnerability depends on the travel pattern in the network and increases with travel demand. The results also show that efficiency vulnerability and travel time vulnerability increase nonlinearly with network deterioration. When the network deterioration is not severe (disruption probabilities are low) the network efficiency vulnerability and travel time vulnerability depend on the average disruption probability of the roads within the network. With further deterioration (higher disruption probability values), both efficiency vulnerability and travel time vulnerability depend not only on the average disruption probability of the network but also on disruption probability of each link.