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For other uses, see Sidetrack (disambiguation).

A sidetrack is a railroad track other than siding that is auxiliary to the main track. The word is also used as a verb (without object) to refer to the movement of trains and railcars from the main track to a siding, and in common parlance to refer to giving in to distractions apart from a main subject.[1] Sidetracks are used by railroads to order and organize the flow of rail traffic.