Incorporating activity space and trip chaining into facility siting for accessibility maximization

Ran Li, Daoqin Tong

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


Location models have been widely used to support locational decisions for various service provision. One common objective of location models has been to ensure maximal accessibility of sited facilities to demand populations. Accessibility evaluation in location models often assumes that trips originate from fixed locations (usually home) and are single purpose. These assumptions contradict the empirical evidence that suggests trips also commonly originate from non-home locations and may involve multiple stops. In this study, a new multi-objective location model is developed that extents the classic p-median problem (PMP) to account for a more realistic assessment of accessibility. Based on the individual accessibility assessment, notions of trip chaining and activity space are incorporated into the model development. In addition to fixed home locations, stops along chained trips are allowed for potential service site visits, and activity space is introduced as an additional dimension to evaluate accessibility of alternative opportunities. The effectiveness of the new model is demonstrated using an application in Tucson, AZ.

Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalSocio-Economic Planning Sciences
StatePublished - Dec 1 2017
Externally publishedYes


  • Accessibility
  • Activity space
  • GIS
  • Location modeling

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Economics and Econometrics
  • Strategy and Management
  • Statistics, Probability and Uncertainty
  • Management Science and Operations Research


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