The steel rail, also know as rail track, railroad rail, is used to guide the train wheels far forwarding, by withstanding the enormous stress by the wheel when a train passes by, and transferring to the tie sleepers as well. The rail shall provide smooth and continuous rolling surface with least resistance. Generally speaking, the heavier the rails and the rest of the track work, the heavier and higher speed for the train these railroad tracks can carry. At electrified railway or automatic block sections, the railroad rail can also be used as the railroad track circuit.

The steel rail, also know as rail track, railroad rail, is used to guide the train wheels far forwarding, by withstanding the enormous stress by the wheel when a train passes by, and transferring to the tie sleepers as well. The rail shall provide smooth and continuous rolling surface with least resistance. Generally speaking, the heavier the rails and the rest of the track work, the heavier and higher speed for the train these railroad tracks can carry. At electrified railway or automatic block sections, the railroad rail can also be used as the railroad track circuit.

The steel rail, also know as rail track, railroad rail, is used to guide the train wheels far forwarding, by withstanding the enormous stress by the wheel when a train passes by, and transferring to the tie sleepers as well. The rail shall provide smooth and continuous rolling surface with least resistance. Generally speaking, the heavier the rails and the rest of the track work, the heavier and higher speed for the train these railroad tracks can carry. At electrified railway or automatic block sections, the railroad rail can also be used as the railroad track circuit.