Equilibrium Traffic Assignment: New Model for Spatially Disaggregate Demand

In all traffic assignment procedures, Traffic Analysis Zones are represented punctually by their centroids. This is the cause for much error. In this paper, a new model for traffic assignment is introduced, that explicitly tackles this issue. This model does not necessitate changes in zones or centroid connectors. It relies on a careful modeling of connectors as random variables, calibrated using land-use databases. A mathematical description of the model is presented, along with a solution algorithm for equilibrium assignment. Finally, the model is applied to the Paris region, with encouraging results.