Originally Posted by
ItsJustMe
Automotive headlights do not do this. They're fixed to the body. In general that's what you want, because if the vehicle isn't level, it's because the road isn't either. It causes trouble on hills, when you're cresting a hill your low beams are shining right into the eyes of oncoming vehicles.
Quite a lot of automobiles have headlights that adjust to the load of the vehicle, either automatically (by sensing excessive sag in the suspension front or rear) or by the driver turning a knob. Not common in the US, but normal many places.