The truck-and-trailer combination makes for a 50-foot-plus articulated snake that is prone to moving like a sine-wave on undulating surfaces such as disjointed Interstate concrete slabs.
I don't think there is much that can be done about it, except perhaps drive on different types of roads, such as smooth blacktops that don't have expansion joints every few feet.
I've been using an AirSafe hitch for 10 years now. It is a wonderful hitch that does provide all the many benefits they claim. However, when it comes to some of the concrete slabs I drive over, it's roller-coaster time, folks.
