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A backyard railroad is a privately owned, outdoor railroad, most often in miniature, but large enough for one or several persons to ride on. The rail gauge can be anything from 2 1⁄2 in (64 mm) to 7 1⁄2 in (190.5 mm) or more. Smaller backyard or outdoor railroads that cannot be ridden are called garden railroads.
Hundreds, even thousands of backyard railroads exist, especially in the United States and United Kingdom. Walt Disney built his Carolwood Pacific Railroad at his home in the Los Angeles neighborhood of Holmby Hills. It also inspired Disney to surround his planned Disneyland amusement park with a working, narrow gauge railroad, the Disneyland Railroad.
Tracks for the layout can be either portable (i.e. removable), or permanent. The former may be of fairly simple welded steel construction, but the latter are usually built from miniature steel or aluminium rails attached to wooden, plastic or even concrete sleepers (US: ties), and put on a proper foundation of crushed stone ("track ballast"), just as in full size. Turnouts (US: switches) are also fabricated from these basic materials. Usually, prototypical appearance is sought for, but some portable tracks may not closely resemble real railroad tracks.
Locomotives and rolling stock
Locomotives on a backyard railroad can be of different types; steam locomotives, gasoline or diesel engines, or even electrically operated, using rechargeable lead-acid batteries inside the locomotive. Miniature steam locomotives are an element of a related hobby known as live steam. One of the more well-known builders of backyard railroad trains was Bud Hurlbut, who also built and operated the mine train ride and log ride at Knott's Berry Farm.
Rolling stock is often modeled after real railroad equipment, as far as being painted with logos of past or existing railroads. Boxcars, flat cars, tank cars and cabooses are common. For passenger use, special cars are constructed, with a low center of gravity for safety.
- Williams, Carey, "The Hurlbut Amusement Company," Large-Scale Railroading, pp.10-19, April–June 2009, Peoria, AZ.
- Merritt, Christopher and Lynxwiler, J. Eric, Knott's Preserved, pp. 92-105, Angel City Press, Santa Monica, CA 2010.