I would imagine that the programming would have to be tweaked for Nascar, but the theory is the same. In many ways a Nascar track is simpler than roads in the wild, you don’t have as many signs.
But remember it is April 1st, and 35+ cars autonomously driving around the track never touching and pre-programmed to pass with the winner pre-determined wouldn’t exactly be NASCAR! ;-) What?...merchandise trailers with Dell & HP server hats? “Go #7 Blade Server!!” Ha!