Analyzing the Vulnerability of the Intersections in Large Networks during a Crisis Occurrence (Case study: Tehran)

Articles in Press

Document Type : Research Paper

Authors

1 School of Civil Engineering, Iran University of Science and Technology

2 Science and Research BranchFaculty of Civil Engineering, Architecture and Art, Science and Research Unit, Islamic Azad University

3 Department of Civil Engineering-Science and Research Branch- Islamic Azad University- Tehran-Iran

Abstract

This study aimed to evaluate the role and importance of intersections in network performance and accessibility damages during a crisis occurrence through which the prioritization of intersections for optimal allocation of resources to ensure the appropriateness of network performance is made possible. Accordingly, a method was proposed to identify vulnerable intersections during a crisis based on comparing their delays in two situations 1) without lights and any kind of control equivalent and 2) lighted with optimal timing schedule as a situation equivalent to the control of the intersection by the police. In such a method, the intersection delay in both conditions is obtained from the mean delay of the links leading to it based on the calibrated delay functions. In addition, it is assumed that the pattern of trips in pre-crisis situation based on the daily trips is maintained to determine the volumes reached at the specific intersection from each link leading to it during crisis occurrence, According to the results of the project implementation in the case of study, 12.7% of network intersections are known as vulnerable intersections. Further, the roads with arterial functional category have the most vulnerable intersections per unit length of roads, indicating their low reliability of travel time in the whole network in the case of this research, which is considered as a result of the inappropriate structure of the network in separating the duties of the roads, especially providing access.

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Quarterly Journal of Transportation Engineering

Articles in Press, Accepted Manuscript
Available Online from 15 January 2024

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History

  • Receive Date: 29 July 2023
  • Revise Date: 28 November 2023
  • Accept Date: 18 December 2023

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