Abstract
The limitation of the scope of scientific research for spatial planning is described. The description of a behavioural system of spatial action determines the direction of problems concerning the household as a decision unity for spatial action. It is argued to use disaggregating models instead of aggregated models. This implies the necessity to introduce a zonal typology; the household lives in a house with a typical environment and a certain level of service. In the last part something is said about experimentation with variables for a zonal typology. It finds out that they are highly significant for the behavioural equations. This offers possibilities to integrate in one model trip end and distribution analyses.