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Turning radius
Minimum dimension for a vehicle to make a turn / From Wikipedia, the free encyclopedia
The turning radius (alternatively, turning diameter or turning circle) of a vehicle defines the minimum dimension (typically the radius or diameter, respectively) of available space required for that vehicle to make a semi-circular U-turn without skidding. The Oxford English Dictionary describes turning circle as "the smallest circle within which a ship, motor vehicle, etc., can be turned round completely".[1] The term thus refers to a theoretical minimal circle in which for example an aeroplane, a ground vehicle or a watercraft can be turned around.
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The terms (radius, diameter, or circle) can have different meanings; refer to the § Alternative nomenclature section.