The STRADA model for dynamic assignment
BUISSON ; LEBACQUE ; LESORT ; MONGEOT
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
BUISSON ; LEBACQUE ; LESORT ; MONGEOT
Résumé / Abstract
The STRADA model is the discretized version of a first-order macroscopic traffic flow model that has been extended in a consistent manner both to intersections and to partial flows. The discretization uses a generalization of the GODUNOV scheme based on the traffic flow supply and demand concepts. As a consequence, a single discretization scheme is applied to both links and intersections, thus providing simplicity in the description of traffic dynamics that makes the model suitable for the simulation of large networks. The model can be used indistinctly for urban street networks, motorways or corridors. Some computational versions of the model have already been realized. We shall present in this paper some preliminary results, related to incidents. A framework for the description and analysis of incidents has been developed, consistent with first order macroscopic traffic flow modeling, and has been suitably adapted to STRADA. As an illustration of these ideas, an example of the effect of VMS (Variable Message Signs) on the assignment of traffic in a simple network is described.
