A Spatio-Temporal Accessibility Measure for Modelling Activity Participation

Activity: Talk or presentationTalk or presentation at a conference


Accessibility is a key indicator for the number and quality of opportunities experienced by an individual. It is generally assumed that high levels of accessibility lead to high levels of activity participation and that a minimal level of accessibility is deemed to lead to social inclusion. Despite the fact that this relationship has been tested in preceding studies, no clear and repeated pattern of correlation has been found between an individual's accessibility and his/her participation in out-of-home activities. Previous studies mostly applied place-based accessibility measures that do not account for the heterogeneity related to an individual's spatio-temporal constraints. However, in addition to the spatial distribution of locations, personal constraints related to the mandatory activities - and therefore, the available time budget throughout the day - impact activity choices and scheduling. This paper proposes a spatio-temporal accessibility measure that takes spatial as well as temporal constraints into consideration for the travel behavior of 11,599 individuals in the Wasatch Front region, Utah. This method is compared to a home-based accessibility measure to assess both methods' ability to predict activity participation. The results show a highly significant, yet moderate correlation between the proposed spatio-temporal accessibility measure and participants' partaking in discretionary activities. The greatest rate of change in participation occurs within the mid-range of accessibility levels, and not in the low end of the accessibility range as was expected. In addition, the spatial method shows a negative and highly significant relationship to activity participation, which indicates that home-based measures may provide counterintuitive findings.
PeriodApr 2017
Event titleAnnual Meeting of the Association of Geographers (AAG): Boston 2017
Event typeConference
LocationBoston, United States