Often used in Formula One or other racing series, it is a time which the driver must qualify the car within 107% of the polesitter’s time to be allowed to compete. Variations of this may be used to monitor drivers and warn them to make the required threshold of speed or be parked (disqualified). Similarly, the IndyCar Series uses a 105% rule and NASCAR has a 115% rule, mainly for performance on track, though INDYCAR and NASCAR often adjust the rule for tracks with very abrasive surfaces (such as Atlanta Motor Speedway) where lap times can be considerably faster when a car has newer tires.