The development and application of a disaggregate Poissonmodel for trip generation. (Second revision). Paper presented at the 59th Annual Meeting of the Transportation Research Board, Washington, D.C., January 1980.

The Poisson model has been applied in the Netherlands as a submodel of the Apeldoorn Transportation Study for modelling shopping and personal business trips. The estimation results appear to be superior to the results of linear and non-linear regressions on the same data. The last section is devoted to the aggregation issue: An analytical aggregation procedure is proposed if the zonal variation of the l-parameter fits a gamma distribution.In the absence of knowledge of the distribution of, other aggregation procedures are discussed, of which the classification method seems most appropriate.