 After the pit stops, the first car one lap down at the moment of caution (known as the free pass car) is permitted to go around the pace car and start the race at the rear of the field, but back on the lead lap.During a full yellow, only lead lap cars may pit the first time by the pit road.Once the lead lap cars who have decided to pit have entered pit road, the free pass car will be sent around the pace car to earn their lap back.