Models in Transport Geography
There is a growing complexity and data requirements for the four common models in transport geography. Each is building upon the other, implying for instance that the estimation of accessibility cannot be assessed without information about distance and that spatial interactions are derived from accessibility assessments:
  • Distance. The most fundamental element of geography in general and transport geography in particular. Distance can be represented in different manners, from a simple Euclidean distance calculation to a complex estimation of a logistical distance that considers all the tasks necessary for the realization of a movement.
  • Accessibility. Defined as the measure of the capacity of a location to be reached by, or to reach different locations. Therefore, the capacity and the arrangement of transport infrastructure are key elements in the determination of accessibility. It is thus based upon the concept of location and distance.
  • Spatial Interaction. A realized movement of people, freight or information between an origin and a destination. It is a transport demand / supply relationship expressed over a geographical space. Routing is a specific category of spatial interaction that considers a given set of origins and destination for which specific (often optimal) routes are found.
  • Transportation / Land Use Models. A complex framework trying to assess the numerous relations and feedback effects between transportation and the spatial structure.