The study on the effect of commercial space under the plan and construction of rail transport in the mountainous cities

Rail transportation is becoming the main form of public transport in cities, as a high capacity, fast, on-time traffic, it\´ s huge crowd gathered effect and specific corridor, give the city a tremendous impact on the development of commercial space. Through depth study of light rail on the 2nd elevated railway construction in Chongqing, the writer study the evolution of commercial space, and find it bring the "point and line" changes on commercial space, while the construction of the commercial space hierarchies, differentiation, characteristics could be a better play to rail traffic on the promotion of the role of commercial space.