Some generalizations and applications of the velocity field concept: trip patterns in idealized cities.

This paper discusses the velocity field concept and seeks to extend its descriptive power by introducing the continuous analogue of the traditional link speed-flow relations used in transportation studies. By solving the resulting velocity field equations self-consistently in terms of land use and socio-economic factors, and various policy variables, the profile of this field, which reflects the spatial distribution of congestion in an urban area, may be found.