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Effect of Earthquake Disruptions of Freight Transportation in A Megacity: Case Study for The Los Angeles Area

  • Abadi, Afshin (Morgan Stanley) ;
  • Ioannou, Petros (Electrical Engineering Systems, University of Southern California) ;
  • Moore, James E. II (Industrial and Systems Engineering, University of Southern California) ;
  • Bardet, Jean-Pierre (Strategic Projects, University of Miami) ;
  • Park, Jiyoung (Department of Urban and Regional Planning, University at Buffalo) ;
  • Cho, Sungbin (Southern California Association of Governments)
  • Received : 2021.09.11
  • Accepted : 2022.04.01
  • Published : 2022.04.30

Abstract

Many megacities are exposed to natural hazards such as earthquakes, and when located in coastal regions, are also vulnerable to hurricanes and tsunamis. The physical infrastructures of transportation systems in megacities have become so complicated that very few organizations can understand their response to extreme events such as earthquakes and can effectively mitigate subsequent economic downfalls. The technological advances made in recent years to support these complex systems have not grown as fast as the rapid demand on these systems burdened by population shift toward megacities. The objective of this paper is to examine the risks imposed on and recoveries of transportation systems in megacities as the result of extreme events such as an earthquake. First, the physical damage to transportation infrastructure, loss of the transportation system performance, and the corresponding economic loss from disruptions to passenger and freight traffic is evaluated. Then, traffic flows are re-routed to reduce vehicles' delay due to earthquakes using a microscopic traffic flow simulator with an optimization model and macroscopic terminal simulator. Finally, the economic impact of the earthquake is estimated nationwide. Southern California is regarded as the region of study. The results demonstrate the effectiveness of the integrated model and provide what and how to prepare innovative resilience policies of urban infrastructure for a natural disaster occurrence.

Keywords

Acknowledgement

This work has been supported by METRANS. Any opinions, findings, and conclusions or recommendations in this document are those of the authors and do not necessarily reflect views of METRANS. We also appreciate anonymous reviewers for their valuable comments that improved this study.

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