Network-based acessibility measures for vulnerability analysis of degradable transportation networks

Anthony Chen, Chao Yang, Sirisak Kongsomsaksakul, Ming Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

179 Citations (Scopus)

Abstract

Accessibility is a fundamental concept in transportation analysis and urban planning. Typically, accessibility refers to the 'ease' of reaching opportunities for activities and services and can be used to assess the performance of a transportation and urban system. In this paper, we present network-based accessibility measures for assessing vulnerability of degradable transportation networks. The network-based accessibility measures consider the consequence of one or more link failures in terms of network travel time or generalized travel cost increase as well as the behavioral responses of users due to the failure in the network. To model different dimensions of travel behavioral responses, a combined travel demand model is adopted to estimate the long-term equilibrium network condition due to network disruptions. Numerical examples are conducted to demonstrate the feasibility of the proposed vulnerability measures for assessing degradable transportation networks. The results indicate that the accessibility measures derived from the combined travel demand model are capable of measuring the consequences of both demand and supply changes in the network and have the flexibility to reflect the effects of different travel choice dimensions on the network vulnerability.
Original languageEnglish
Pages (from-to)241-256
Number of pages16
JournalNetworks and Spatial Economics
Volume7
Issue number3
DOIs
Publication statusPublished - 1 Sep 2007
Externally publishedYes

Keywords

  • Accessibility
  • Combined travel demand model
  • Randomutility
  • Vulnerability analysis

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Artificial Intelligence

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