We used to do GV races when I was still hosting, we raced mostly the fast ones (M8, M3, Jeep). You had to follow the taxi-ways around an airfield, and you weren't allowed to leave the tarmac. Shooting wasn't allowed either (too much shooting, too little racing!)
It was great fun all over, and we had some good competitions! (jeeps were the best fun, because when you flip after a sharp corner, hit the vehicle supplies and go go go again

)