planman

Pretty much 65 mph max. Travel and fuel with the semi trucks.

There is a DOT exemption for private use that is heavily influenced by the RV lobby.

Brakes on each 7k lbs axle. Trailer axles and brakes are capable of 21k lbs.

I got 4-6 mpg that trip to Moab--depending on the wind and mountain terrain.

That trailer is very popular for hotshot car haulers.