Rig shot means its planned shot?
yeah 30 secs and that sharp is impossible when the car is moving, some set up?
Rigged doesn't mean "set up".
Rigged shot means that the camera is physically attached by means of straps, poles etc, so that it will always remain the same distance from the car for the duration of the exposure. So when the car moves, the car remains stationary in the camera's frame for the shot, while the background moves and ends up streaky like that. Of course, the driver needs to remain perfectly still in this case too.