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The use of space–time constraints for the selection of discretionary activity locations
Highlights We derive space–time constraints from a Chilean household and travel survey. Spatial detours dependent on the home-work distance are estimated to describe the potential path area using a GIS. According to the mode-dependent daily travel time the set of feasible locations is further reduced. The approach covers about 50% of the locations decisions reported in the survey.
Abstract The development of methods of studying individuals’ selection of discretionary activity locations remains a challenge for empirical analysts and transport modelers. Time geography and, in particular, the concept of space–time constraints provides a useful framework for these selection processes. In this work we empirically determine space–time constraints from the Chilean household and travel survey. Based on a specific activity pattern example, where trips are made from home to work to a discretionary activity and back home, we estimate detour factors. Detour factors describe the spatial deviations that are made from the home-work axis to conduct the discretionary activity. Using GIS we estimate potential path areas (PPAs), where discretionary activities may be located. Within the PPAs, applying a time constraint that is the maximum daily travel time refines the selection of discretionary activity locations. The thresholds of the daily travel time vary according to the PPA-size and mode combinations. We were able to reproduce between 38% and 72% of the discretionary location choices observed in the survey (according to the rigor of the constraints applied).
The use of space–time constraints for the selection of discretionary activity locations
Highlights We derive space–time constraints from a Chilean household and travel survey. Spatial detours dependent on the home-work distance are estimated to describe the potential path area using a GIS. According to the mode-dependent daily travel time the set of feasible locations is further reduced. The approach covers about 50% of the locations decisions reported in the survey.
Abstract The development of methods of studying individuals’ selection of discretionary activity locations remains a challenge for empirical analysts and transport modelers. Time geography and, in particular, the concept of space–time constraints provides a useful framework for these selection processes. In this work we empirically determine space–time constraints from the Chilean household and travel survey. Based on a specific activity pattern example, where trips are made from home to work to a discretionary activity and back home, we estimate detour factors. Detour factors describe the spatial deviations that are made from the home-work axis to conduct the discretionary activity. Using GIS we estimate potential path areas (PPAs), where discretionary activities may be located. Within the PPAs, applying a time constraint that is the maximum daily travel time refines the selection of discretionary activity locations. The thresholds of the daily travel time vary according to the PPA-size and mode combinations. We were able to reproduce between 38% and 72% of the discretionary location choices observed in the survey (according to the rigor of the constraints applied).
The use of space–time constraints for the selection of discretionary activity locations
Justen, Andreas (author) / Martínez, Francisco J. (author) / Cortés, Cristián E. (author)
Journal of Transport Geography ; 33 ; 146-152
2013-01-01
7 pages
Article (Journal)
Electronic Resource
English
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