turning circle
From Longman Dictionary of Contemporary EnglishRelated topics: Motor vehiclesturning circleˈturning ˌcircle (also turning radius) noun [countable] TTCthe smallest space in which a vehicle can drive around in a circleExamples from the Corpusturning circle• He took Susan Hart's directions and found the no-through road and the turning circle and the track.• His car was in the turning circle.