Transit Network Design and Frequency Setting accounting for Vulnerability

Abstract

Transit network design in the phase of transit route design and frequency setting primarily aims on the minimization of passenger and operator related costs, neglecting vulnerability sourcing from its critical infrastructure. This study focuses on enhancing the resilience of public transit networks by incorporating vulnerability analysis into the transit network design problem. After estimating a set of candidate solutions with their critical infrastructure, we proceed to the optimization of frequencies of the solution that resulted to the lowest disruption cost. Simulated annealing is used to adjust the frequencies of the transit lines subject to fleet availability and capacity constraints. Applied to Mandl’s network, the results shown that the final solution experiences significantly limited losses from disruption, while offering a comparable solution to the other candidate solutions that their objective is limited to cost optimization.