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Séminaire d’Economie des Transports

Martin Koning (IFSTTAR, Université Paris-Est)

Le Mardi 12 décembre à 14h en salle D108 Université Lyon 2, voir le plan

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An Empirical Analysis of Welfare Losses Caused by Passengers and Freight Transport : The Paris Case Study

Abstract : This paper provides a tentative empirical appraisal of welfare losses caused by urban road freight in the Paris region, including congestion as well as its main environmental impacts. To do so, we calibrate an aggregate supply-demand model of passenger and freight road transport. Demand is represented by two independent functions, which in practice aggregate OD matrices generated by the freight generation and distribution model FRETURB and by the 4-step passenger travel model MODUS. The supply functions are co-dependent and account for congestion within a multiclass framework, based on the road assignment module of MODUS. We find that the current (un-tolled) situation leads to substantial welfare losses (2M€ per hour), 18% of which are linked to trucks (that represent 4% of total traffic in the effective equilibrium). While the marginal social cost (per vehicle kilometre) of heavy vehicles is significantly larger than for light vehicles (4.81€/vkm vs. 1.54€/vkm), under reasonable assumptions traffic mitigation efforts should focus more on light vehicles than on heavy vehicles in the Paris region in order to reach the social welfare optimum.

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