Remember the license tests in Gran Turismo?
We would pick a start and finish on any of S2's tracks (incl. Autocrosses so no one's left out), the car speed and direction states at the start, whether HLVC restrictions are on (e.g. object contact), etc.

It'd make it possible to practice certain parts of the tracks, without going all around, and quicker and more precise (e.g. entry speed and angle) than manualy reversing to the starting point.