Measuring place-based accessibility under travel time uncertainty

Bi Yu Chen*, Hui Yuan, Qingquan Li, Donggen WANG, Shih Lung Shaw, Hui Ping Chen, William H.K. Lam

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

77 Citations (Scopus)


Travel time uncertainty has significant impacts on individual activity-travel scheduling, but at present these impacts have not been considered in most accessibility studies. In this paper, an accessibility evaluation framework is proposed for urban areas with uncertain travel times. A reliable space-time service region (RSTR) model is introduced to represent the space-time service region of a facility under travel time uncertainty. Based on the RSTR model, four reliable place-based accessibility measures are proposed to evaluate accessibility to urban services by incorporating the effects of travel time reliability. To demonstrate the applicability of the proposed framework, a case study using large-scale taxi tracking data is carried out. The results of the case study indicate that the proposed accessibility measures can evaluate large-scale place-based accessibility well in urban areas with uncertain travel times. Conventional place-based accessibility indicators ignoring travel time reliability can significantly overestimate the accessibility to urban services.

Original languageEnglish
Pages (from-to)783-804
Number of pages22
JournalInternational Journal of Geographical Information Science
Issue number4
Publication statusPublished - 3 Apr 2017

Scopus Subject Areas

  • Information Systems
  • Geography, Planning and Development
  • Library and Information Sciences

User-Defined Keywords

  • Place-based accessibility
  • reliability
  • service area analysis
  • travel time uncertainty


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