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目前国际轨道交通有地铁、轻轨、市郊铁路、有轨电车以及悬浮列车等多种类型,号称“城市交通的主动脉”。城市轨道交通和其他公共交通相比,具有以下特点:用地省,运能大,轨道线路的输送能力是公路交通输送能力的近10倍。每一单位运输量的能源消耗量少,因而节约能源;采用电力牵引,对环境的污染小。
At present, there are many types of international rail transit such as subways, light railways, suburban railroads, trams and suspension trains, which are called “the aorta of urban traffic”. Compared with other public transport, urban rail transit has the following characteristics: the province of land use can transport large capacity, and the transmission capacity of the rail line is nearly 10 times of the transport capacity of the road transport. Energy consumption per unit of transportation volume is small, thus saving energy; the use of electric traction, environmental pollution.