Large-scale road network vulnerability analysis: A sensitivity analysis based approach

Paramet Luathep, Agachai Sumalee, H. W. Ho, Fumitaka Kurauchi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

80 Citations (Scopus)


Traditionally, an assessment of transport network vulnerability is a computationally intensive operation. This article proposes a sensitivity analysis-based approach to improve computational efficiency and allow for large-scale applications of road network vulnerability analysis. Various vulnerability measures can be used with the proposed method. For illustrative purposes, this article adopts the relative accessibility index (AI), which follows the Hansen integral index, as the network vulnerability measure for evaluating the socio-economic effects of link (or road segment) capacity degradation or closure. Critical links are ranked according to the differences in the AIs between normal and degraded networks. The proposed method only requires a single computation of the network equilibrium problem. The proposed technique significantly reduces computational burden and memory storage requirements compared with the traditional approach. The road networks of the Sioux Falls city and the Bangkok metropolitan area are used to demonstrate the applicability and efficiency of the proposed method. Network manager(s) or transport planner(s) can use this approach as a decision support tool for identifying critical links in road networks. By improving these critical links or constructing new bypass roads (or parallel paths) to increase capacity redundancy, the overall vulnerability of the networks can be reduced.
Original languageEnglish
Pages (from-to)799-817
Number of pages19
Issue number5
Publication statusPublished - 1 Sept 2011


  • Accessibility
  • Large-scale road network
  • Sensitivity analysis
  • Vulnerability analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Development
  • Transportation


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