摘要 : This paper presents a model of competition between road and rail for freight transport, which supposes that the cost of road transport is increasing function of flow, while that of railway is decreasing function, because of the in... 展开 This paper presents a model of competition between road and rail for freight transport, which supposes that the cost of road transport is increasing function of flow, while that of railway is decreasing function, because of the innovations implemented to reverse the rail decline. The model studies the evolution over time of the proportions of freight flow carried by the two transport modes, and identifies the conditions in which the rail transport innovations are successful. The model has been applied to the study of the evolution of the competition between road and rail for freight transport through the Swiss Alps. 收起