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New NASCAR Rule Will Extend Races to Avoid Finishing Under Yellow Flag

Sprint Cup, Xfinity, and Truck Series races will all run as many laps as necessary to finish under green, replacing the old green/white/checkered flag rule.​​

From Road & Track

Hot on the heels of NASCAR's newly-announced franchise-style team ownership system comes an even bigger change: For the 2016 season, Sprint Cup, Xfinity, and Truck Series races will do away with finishes under yellow flag, instead adding as many laps as necessary to get a green flag finish.

As Autosport reports, the new rule, dubbed "NASCAR overtime," establishes an "overtime line" at a specific point, varying from track to track. If the race leader passes the overtime line on the first lap under green before a caution, it's considered a completed last lap and the resulting positions are counted. If a caution flag comes out before the lead car crosses the overtime line on the first lap under green, it's a failed attempt, and subsequent attempts are made until a clean finish can be recorded.