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Movement Takes Time: A Note on the Time of Movement

  • Waldo Tobler

Abstract

Continuous transportation modelling was introduced by Martin Beckmann in 1952, and continues in some of his recent books with Tonu Puu. My own recent work has also dealt with this topic and with spatial interaction models in both continuous and discrete form, especially as related to migration. The general class of models here includes the PP/D gravity model as used by Zipf, Stewart, Warntz, Isard, and others: the entropy model introduced by Alan Wilson; the Hitchcock-Koopmans-Kantorovitch linear transportation problem, the quadratic transportation problem, and the spatial price equilibrium model described by Samuelson and later workers. In all of these problems I have constantly encountered two difficulties.

Keywords

Transportation Problem Urban Traffic Spatial Interaction Model Employee Number Discrete Choice Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin · Heidelberg 1993

Authors and Affiliations

  • Waldo Tobler

There are no affiliations available

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