Every motor vehicle, trailer, semitrailer, house trailer and pole trailer, and every combination of such vehicles, except motorcycles and mopeds, equipped with brakes shall have the braking system so arranged that one control device can be used to operate all service brakes. The braking system on the towed vehicle may be surge actuated brakes. This requirement does not prohibit vehicles from being equipped with an additional control device to be used to operate brakes on the towed vehicles. This regulation does not apply to driveaway or towaway operations unless the brakes on the individual vehicles are designed to be operated by a single control on the towing vehicle.