Note - We're NOT implementing Green White Chequered finishes until next season but the new caution rules will be effective immediately, on trial for the remainder of the season. New caution procedure reminder is below.
Caution will be called, pits closed and field bunched up at 70mph as usual. Then when the pits are opened and people enter, everybody who stays out will accelerate to 100-110mph (TBA)* maximum and restart the race single file next time by. The cars that have pitted will be able to go full speed upon exiting the pits and will be able to overtake once green flag is called by the cars that stayed out. This creates a 15-20 second cushion between the groups, a suitable but not over the top penalty for pitting.
*The speed for the non pitting cars must change for each track to create the same gap at all courses. Therefore this is just an estimate; the official speed will be tested and trialled pre-race and announced before the green flag.