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本世纪下半叶,国外铁路及城市轨道交通的旅客运输以其大运量、快捷、安全、舒适、节约能源、环境污染小、占地面积少等优点引起各国政府的重视,得到优先发展。统计材料表明,在大运量方面,铁路及城市轨道交通运输占有绝对优势,是其它任何交通工具无法替代的;在快捷方面,高速铁路可以达到民航飞机1/2的速度,在中距离运输中很具竞争力;在安全方面,铁路及城市轨道交通旅客运输的安全性优于任何一种其它交通工具。铁路的安全性为公共汽车的
In the second half of this century, the passenger transport by foreign railways and urban rail transit attracted the attention of governments of all countries for its advantages of large capacity, fastness, safety, comfort, energy conservation, small environmental pollution and small area, and gave priority to development. Statistics show that in terms of large traffic volume, railways and urban rail transit have an absolute advantage and can not be replaced by any other means of transport. In the short term, high-speed railways can achieve the speed of civil aircraft 1/2 in medium-distance transport Very competitive; In terms of safety, passenger transport by rail and urban mass transit is more secure than any other type of transport. The safety of the railway for the bus