Yellow Line Rule Meaning in NASCAR

The yellow line rule prevents drivers from passing below the track bounds. This painted line separates the banked racing surface from the flat apron. Driving below this mark to gain a position results in a penalty. Officials use this rule primarily on the largest and fastest oval tracks. One driver moves below the line and loses their current scoring position. This safety measure prevents dangerous collisions at two hundred miles per hour. Drivers may only cross the line to avoid a large accident. Staying on the banked surface ensures a fair and safe competition. Professional racers must respect this boundary during every lap of the race.