100 Laps: 50 Laps, 20 Laps, 20 Laps, 10 Green Flag Laps (2009-present)
For the 25th anniversary of the race, two of the more popular elements of the classic format returned for this special edition.
The first segment became a 50-lap quarter, with a mandatory pit stop taking place in Lap 25 of the segment, the pit stop must be a four-tire Stop and take place during a green flag condition. Following the first two segments, cars will have the option of pitting, but they will lose track position should they do so.
The second and third segments were twenty laps each, returning to the 2007 format. Following the end of the third segment, a ten-minute break took place, allowing for adjustment of cars preceding the final segment, a ten-green flag lap shootout. The popularity of the double-file restarts throughout the race lead NASCAR to adopt the rule for the second half of the 2009 season.[1]