ABSTRACT
The concept of accessibility has formed a part of transport and land use planning. Measures of accessibility are indicators reflecting the impact that land use distribution and the characteristics of the transport system have on the users. This means that both land use and transport ought to be related because they give people the opportunity of participating in activities occurring in different places. Four basic components can be identified when measuring accessibility: land use component, transport component, time component, and individual component. Many accessibility indicators can be found in the literature, ranging from those based only on the route or category of the infrastructure, to others such as accumulated opportunities that analyse the destinations reachable from an origin within a certain threshold. The indicators based on the gravity analogy remove the limitation of having to fix a limit, weighting the opportunities by the cost of reaching them and thereby being able to include all destinations in the study area.
