In most U.S. states and Canadian provinces/territories, a supplemental braking system is required by law whenever you're towing. In all but a few states, you MUST have a towed car braking system installed whenever you tow a trailer of a certain weight or any vehicle. A towed car brake system helps to reduce the strain on your RV's primary brakes. Your motorhome will brake more easily and the wear and tear on the brakes will be reduced considerably by using a supplemental braking system. Also, here at Blue Ox it will put less strain on your tow bar and baseplate.