Groove

Slang term for the best route around the racetrack; the most efficient or quickest way around the track for a particular driver. The “high groove” takes a car closer to the outside wall for most of a lap while the “low groove” takes a car closer to the apron than the outside wall. Road racers us the term “line.” Drivers search for a fast groove, and that has been known to change depending on track and weather conditions.