La place des modèles de trafic dans les récentes modélisations des impacts environnementaux des transports. Importance de l’explicitation des méthodes et hypothèses

Abstract

Abstract : The authors present a recent evolution in the use of the classic Travel Demand Models (TDM) to environmental impact assessment of transport, far from its initial target. By comparing previous cases found in the literature (Chester, Seoul, Florence, Brisbane and Saint-Etienne) with their own present works (Eval-PDU in Nantes), the authors notice reluctantly that their predecessors tend to be evasive on their use of TDM. So, traffic data are little discussed in these works while they constitute one of the main stakes in this kind of study. Indeed the hypotheses assumed for traffic modeling are impacting the next steps of the modeling chain (pollutants emission/dispersion). The importance of this first modeling stage excludes the possibility to leave it off the scene.

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