Measuring vulnerability of urban metro network from line operation perspective |
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| Institution: | 1. State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Transportation Research Center, Shanghai Jiao Tong University, Shanghai 200240, China;1. Departamento de Geografía Humana, Universidad Complutense de Madrid, Spain;2. Departamento de Geografía Humana, Facultad de Geografía e Historia, Universidad Complutense de Madrid, C/ Profesor Aranguren, s/n 28040 Madrid, España, Spain;1. Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, The Netherlands;2. Systems Engineering Section, Faculty of Technology, Policy and Management, Delft University of Technology, The Netherlands;3. Civil and Materials Engineering Department, University of Illinois at Chicago, USA;4. Utrecht University, The Netherlands;5. TNO South-East Asia, Singapore;1. Department of Geographic Information Science, Nanjing University, Nanjing, Jiangsu Province 210023, PR China;2. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, Jiangsu Province 210023, PR China |
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| Abstract: | Urban metro systems are subject to recurring service disruption for various reasons, such as mechanical or electrical failure, adverse weather, or other accidents. In recent years, studies on metro networks have attracted increasing attention because the consequence of operational accidents is barely affordable. This study proposes to measure the metro network vulnerability from the perspective of line operation by taking the Shanghai metro network as a case study. As opposed to previous studies that focused largely on disruption of important nodes or links, this study investigates the disruption from the line operation perspective. Betweenness centrality (BC) and passenger betweenness centrality (PBC), number of missed trips, weighted average path length, and weighted global efficiency were analyzed considering relative disruption probability of each line. Passenger flow distribution and re-distribution were simulated for different disruption scenarios based on all-or-nothing assignment rule. The results indicate that the metro lines carrying a large number of passengers generally have a significant impact on the network vulnerability. The lines with circular topological form also have a significant influence on passenger flow re-distribution in case of a disruption. The results of this study provide suggestions on metro system administration for potential improvement of the performance of operation, and passengers may meanwhile have an improved alternate plan for their commute trip when a disruption occurs. |
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| Keywords: | Metro network Vulnerability Disruption Passenger flow Line operation |
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