Increasing the resilience of rail network through the optimal location of relief trains

Articles in Press

Document Type : Original Article

Authors

1 Department of Civil Engineering, Engineering Faculty, University of Tehran, Tehran, Iran

2 Department of Civil Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran

Abstract

A resilient rail system has the ability to return to its normal operation quickly after losing its performance when an accident happens. In this paper, a method is proposed to increase the resilience of the rail network through the optimal location of the relief train in order to reopen the damaged railroad segment and to allocate it to the vulnerable rail segments of the network. To this end, the exposure of link index is proposed to determine the vulnerability of each rail link in terms of the importance of that link in the network and its accessibility to road as a support system in emergency. Considering the specific operating conditions of the problem, a bi-objective mathematical programming model is proposed to maximize the cooperative coverage of the vulnerable links of the network and minimize the total emergency travel time of relief travel. To solve this model, the Augmented Epsilon-Constrained Method (AUGMECON) has been used to determine the optimal Pareto solutions. In order to illustrate the true applicability of the proposed methodology and verify the obtained results, the rail network of Iran has been adopted as a case study and its results have been analyzed.

Keywords

Journal of Transportation Research

Articles in Press, Accepted Manuscript
Available Online from 11 November 2019

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