NASCAR has fined two drivers for walking across the race track at Dover last weekend.

Trevor Bayne was fined $20,000 and placed on probation for the rest of the year for walking across the racing surface on Sunday. Jennifer Jo Cobb was fined $5,000 and placed on probation through Dec. 31 for doing the same thing during Friday's Truck Series race.

NASCAR last August banned drivers from walking onto the racing surface following a fatal accident involving Tony Stewart at a dirt track in upstate New York. Kevin Ward Jr. was struck and killed when he approached Stewart's moving car.

NASCAR also issued a P1 penalty against Kevin Harvick's team for receiving written warnings in consecutive events. He'll have the last choice of pit selection this weekend at Pocono.