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].