(AP Photo/Chuck Burton)
DAYTONA BEACH, Fla. (AP) Looking to end the frustration and confusion that comes when caution flags come out late in its races, NASCAR announced Thursday that it is shifting to an unlimited green-white-checkered finish protocol and establishing an "overtime line" to determine the winner.
The line will vary by track. If the race leader passes the line on the first lap under green before a caution comes out, it will be considered a valid green-white-checkered attempt. If a caution comes out before the leader passes the overtime line on the first lap under green, it will not be a valid attempt. The race continues until a valid attempt.
NASCAR previously had a limit of three tries to complete the race.