As far as I know, no such thing exists. Additionally, the crews are swapped at each rest stop so that no one team becomes are overburdened, or bond, or whatever.
It would have to be on a set schedule too. If it was random some poor souls would get stuck with Jen 3 times in a row and go postal in an airport.
According to the FAQ at TARflies, the racers don’t have to stop for anything, but if the crew needs to stop and eat or use the restroom, the racers have to stop. Good reason to keep on the good side of the crews.