Tracking Towbar System by Sidewinder - Derek Bester

I assume (only from looking at the photos on the link) that it automatically moves the towbar off centre as you turn corners to keep the trailer tracking in the tow vehicles wheel tracks - would be great for tight tracks (I think...)
Drew

Not too sure what the application would be for a road going concern.

There are two different types related to a tractor that is the "swinging Drawbar" which can be locked in position by pins allowing it to be used in and offset position and a "rolling drawbar" which can roll freely in either direction, when towing an implement in a straight line it pulls in the middle but when cornering it swings to the side thus reducing the sideways forces on rear tyres on a convention tractor and it spreads the strain on an articulated or track tractor.

I would thing that on a road situation one would not want a roller action. Imagine the sway you could achieve with the drawbar moving as well.