ABSTRACT
Travel behaviour research is about human movement patterns. Transport modelling has operationalized short-term destination choice by applying both aggregate and demographically disaggregate approaches. Aggregate trip-distribution models widely rely on the well-known gravity model and refinements of this approach, which goes back to Newton's law of gravitation. One of the first aggregate approaches to estimating people's range of movement and contact is Hgerstrand's Mean Information Field (MIF). In brief, the MIF gives the average spatial extent of a person's short-term contacts. The basic aim behind operationalizing the heretofore theoretical Lund-School approach was to derive an individual daily potential path area (DPPA), which is the physically accessible part of space based on an individual's restrictions, commitments and opportunities. Space-time approaches include personal time-budget and space-time constraints as important determinants of accessibility. Activity spaces are linked to the concept of territoriality, i.e., direct contact with locations has an influence on how we define territories or habitats.
