The radio has not yet replaced the traditional red and green flags.
The accident during the first green flag is from the 1966 race.
The green flag came back out on with 26 laps to.
On lap 97, Johnson brought the field to the green flag.
The second attempt, although similar in formation, was given the green flag.
Passing is allowed at any time after the green flag.
The leaders and other lead lap cars are now in front always when taking the green flag.
In total, five cars were out of the race before the green flag.
"When they drop that green flag, every one of those 43 guys is going for the win."
On October 19, 1969 a field of 29 cars took the green flag at the track for the very last time.