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Cross Efficacy Evaluation of the Solutions of Network Design based on Resiliency and Consumers’ Surplus under Supply and Demand Uncertainties

Golriz Khatami, Azin | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54201 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Poorzahedi, Hossain
  7. Abstract:
  8. Network design problem has been, and is, an important problem in transportation. Network design based on different objectives affects network's performance in different dimensions, so it is crucial to define a good objective for the network design problem that improves the network's performance in more than one aspect. The purpose of this study is to obtain the differences between the two network design problems, one based on resiliency, and the other based on consumer surplus.Network design problem based on consumer surplus minimizes the total travel time for the users in the network. Network design problem based on resiliency is defined as: (1) before the incident, (2) after the incident for 72 hours, and (3) from 72 hours after the incident to the complete network’s recovery. The objective of the network design problem based on resiliency before the incident is maximizing network resiliency by improving the existing links or adding the new links to the network. The primary goal in the network design problem based on resiliency after the incident for 72 hours is to maximize the total survivals in the network after that incident.The first part of this research solves the network design problem based on consumer surplus and resiliency on the test network of Sioux Falls. Then, the effects of the results on the networks' performance before an earthquake are determined. In the second part of this research, the performance of the existing network, once designed based on consumer surplus or resiliency measures before the incident, is evaluated based on the number of survivors after an earthquake.It is concluded that network design based on resiliency before an incident, improves the performance of the network after the incident, and results in decreasing the losses after the incident. Also, in the cases examined, network design based on resiliency before an incident satisfies users’ daily needs in normal situations to a reasonable level, more than what network design based on consumer surplus satisfies resiliency measure after the incident
  9. Keywords:
  10. Transportation Network Design ; Population Survivals ; Resiliency after the Incident ; Resiliency before the Incident ; Consumer Surplus ; Total Travel time ; Transportation Network Design ; Demand Uncertainty

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