Value of travel time reliability: A review of current evidence

Carlos Carrion, David Levinson

Research output: Contribution to journalArticlepeer-review

263 Scopus citations


Travel time reliability is a fundamental factor in travel behavior. It represents the temporal uncertainty experienced by travelers in their movement between any two nodes in a network. The importance of the time reliability depends on the penalties incurred by the travelers. In road networks, travelers consider the existence of a trip travel time uncertainty in different choice situations (departure time, route, mode, and others). In this paper, a systematic review of the current state of research in travel time reliability, and more explicitly in the value of travel time reliability is presented. Moreover, a meta-analysis is performed in order to determine the reasons behind the discrepancy among the reliability estimates.

Original languageEnglish (US)
Pages (from-to)720-741
Number of pages22
JournalTransportation Research Part A: Policy and Practice
Issue number4
StatePublished - May 2012
Externally publishedYes


  • Meta-analysis
  • Reliability
  • Scheduling
  • Travel time
  • Variability


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