For higher speeds (measured at a small distance from the point of initiation of a sharp turn) the fastest way round is to "outside loop" - that is, steer away from the curve, and do a skidding 270.

This technique is taught in advanced driving schools.

References:

M. Freeman and P. Palffy, American Journal of Physics, vol 50, p. 1098, 1982. P. Palffy and Unruh, American Journal of Physics, vol 49, p. 685, 1981.

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