The aim of this thesis is to describe the system of competition between the combined transport and the road transport through a quantitative analysis of the factors influencing the choice of the domestic combined transport. This analysis is based on the use of econometric tools for the choice of the transport mode based on the theory of consumer utility maximization. In order to find the factors sensitive to combined transport, the research followed a dual path: on the one hand, aggregated modelling of modal split using data from a sample of 44 primary corridors for domestic combined transport, and on the other hand, disaggregated modelling using data from an INRETS's survey of carriers. The results obtained during this work are rather encouraging. Our study confirms that factors such as price and distance have a strong influence upon the choice of combined transport. Moreover, other factors such as time intervals for train departures, the various categories of carriers, and the value per kilo of the parcel to be sent also influence the choice of combined transport. The method we used is able to forecast the influence of competition on the freight market and can also be a useful analytic tool for helping a policy that would develop combined transport.
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