在统一交通运输系统中,城市客运交通占有极重要位置,它不仅为物质生产过程所必需,而且还能满足人们在物质和文化方面愈益增长的要求。城市客运交通,尤其是地下铁道,由于它对人们和周围环境的有利影响,已显示出较高的社会经济效益,因而促 In a unified transportation system, urban passenger transport occupies a very important place, which is not only necessary for the material production process, but also meets people’s growing material and cultural requirements. Urban passenger transport, especially the Mass Transit Railway, has shown high socio-economic benefits because of its favorable impact on people and the surrounding environment, thus promoting