At present, it becomes the main trend of transport development to vigorously develop urban rail transit and to establish a multi-level, three-dimensional integrated transport system . From October 1969, through 40 years, China has stepped onto the stage of large-scale urban rail transit construction. Currently, rail transit lines have been built in more than 10 cities. Urban rail transportation planning has been developed and under implementation in more than 50 cities with the planning mileage over 7500 km...