Driver position in the car. Ovals are a US deal, and CCW puts the driver away from the wall. Road racings origins were with Anglophiles, and righthand drivers, thus CW (easier to see the inside of the turns.
McFez
McHank,
The Nascar guys are running the same direction as you and I at the Glen.
Can you imagine running the back straight at full speed and then going down hill without lifting? What a ride.