Abstract
In this paper the design of a new land-use modelling package, DELTA, is described. The focus is on the thinking behind the design and the model characteristics that have resulted rather than on the formal mathematical specification. The package has been designed to link with any appropriate transport model so as to create a dynamic system for land use – transport interaction modelling. DELTA itself is a model of a variety of different processes of change in an urban system. It is intended to represent these processes of change over a succession of relatively short (one-year or two-year) periods. The different processes are fairly weakly linked to each other within any one time period but important feedback effects, both positive and negative, come into play over time, both within DELTA and through interaction with transport. The model design is not based on any one key theoretical concept, but on the view that differing concepts are needed to represent the various processes. The processes modelled can be ...
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