Yes NASCAR and IndyCar oval tracks have catch fences around a at least part of the tracks. These are for the safety of the fans, not the drivers. Crashing into the fence will shred the car. This is how Dan Wheldon died.
Not to mention that both series design cars to avoid going airborne or rolling as much as possible (the fenders on the DW12 IndyCars, the arrestor flaps on stock car roofs).
