Concept railroad (ustar. the zhelezyanka) designates the strip of the earth or a surface of an artificial construction (a tunnel, the bridge, a platform) equipped with rails which is used for the movement of rail vehicles. The railroad can consist of one way or several. The railroads happen to the electric, diesel, turbine, steam or combined draft. A special view of the railroads — gear. Usually the railroads are equipped with system of the alarm system, and the railroads on electric draft — also contact network. Distinguish the public railroads, the industrial railroads (access roads of the enterprises and organizations) and the city railroads — the subway and the tram.
The term the railroad is also used for designation of transport railway system on transportation of passengers and freights in general.
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Introduction of a railway track to operation