Source: adapted from. Giuliano, G. (1995) "Land Use Impacts of Transportation Investments: Highway and Transit", in S. Hanson (ed) The Geography of Urban Transportation, New York: The Guilford Press, p. 307.
Transportation-Land Use Interactions
Transportation and land use are part of a retroactive feedback system where they influence one-another. Changes in transportation technology, investment and service characteristics can alter overall accessibility levels as well as the relative accessibility of different locations. Land use changes also affect activity patterns. Of special importance are the changes in trip generation, both for passenger and freight. Trip patterns may change in a number of ways, such in terms of the number of trips, the timing of trips, their origin or destination, the mode, and trip chaining. These changes in travel demand exert considerable influence on the development of new transportation infrastructure or services. As such, the interactions between transportation and land use are often referred as a "chicken-and-egg" conundrum:
"You can start with land use, or you can start with transportation; in either case, the basic feedback lead inevitably to a hierarchy of central places and transportation links connecting them" [Moore and Thorsnes, 1994].