Role of Urban Rail Transit in Urban Traffic System and Its Inevitability of Development

This paper illustrates the urban rail transit system's roles in the city from four aspects: First, to promote the structure rationalization of urban traffic system; second, to support the intensive urban land use; third, to guide the city to change the usage of land patterns during outward expansion; fourth, to clean up the environment, save energy, construct "green transportation." On this basis, revealing the necessity of the rapid development of China's urban rail transit: acceleration of urbanization, the rapid expansion of urban areas; intensification of urban land use, the high concentration of attracting amount; acceleration of the process of urban transport motorized, lack of road resources, all need the great development of rapid rail transit system. Urban rail transit will be the key infrastructure investment during" Twelfth Five-Year Plan", China will welcome the golden decade of urban rail transit construction.