A transportation corridor was defined in terms of transportation and regional economy,and its basic structure was analyzed based on the social-technical theory.A transportation corridor was regarded as a biome,and its evolutionary process was elaborated.A 4-phase life cycle model was proposed to describe the ontogenetic process of a transportation corridor on a microscopic scale,and the main phases of its self-organization evolution were discussed on a macroscopic scale.The evolutionary mechanism of a transportation corridor is the coordinated development resulting from the mutual coupling hypercycles between the transportation corridor and the geographical system where it locates,and between the transportation corridor and the transportation system.