What is a frog in railroad terms?

Frog – A track structure used at the intersection of two running rails to provide support for wheels and passageways for their flanges, thus permitting wheels on either rail to cross the other. Frog Angle – The angle formed by the intersecting gauge lines of a frog.



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A railroad switch ( AE ), turnout, or [set of] points ( CE ) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off.

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Also known as: Fulica. coot, any of ten species of ducklike water-dwelling birds of the genus Fulica in the rail family, Rallidae. Coots are found throughout the world in larger inland waters and streams, where they swim and bob for food, mostly plants, seeds, mollusks, and worms.

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