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A roundhouse is a maintenance facility used by railroads. Roundhouses are the large, circular or semicircular structures that are located surrounding or adjacent to turntables. The roundhouse in a railroad yard is typically where steam locomotives were stored when they weren't in use.
Since the great dieselization era of the 1940s and 1950s, many roundhouses have been demolished, but a few still stand and remain in use on the railroads.
The Baltimore & Ohio Railroad Museum, in Baltimore, MD, is located in the restored roundhouse of the Baltimore & Ohio Railroad.
Rail transport