文档介绍：关于铁路运输_1200字
Railway transportation includes urban express railways, subways, light rails, and trolley cars.
关于铁路运输_1200字
Railway transportation includes urban express railways, subways, light rails, and trolley cars.
Beijing, Shanghai, Chongqing, Wuhan, and Changchun are all planning to build such a network to conquer the traffic jams and serious pollution caused by the rapid increase of the urban population and the number of automobiles in China.
The network will have the advantages of cleanliness, security, punctuality, high speed, and large transport capacity, said the officials.
Financial and technological factors have hampered the development of such a system over the past three decades, and there are now only about 90 km of underground lines in the country with some 600 subway trains in use.
Now, however, Beijing alone is planning