Except as provided in this section and § 46.2-1117, no motor vehicle shall be driven on a highway while drawing or having attached thereto more than one motor vehicle, trailer, or semitrailer unless such vehicle is being operated under a special permit from the Commissioner of Highways. This limitation, however, shall not apply between sunrise and sunset to farm trailers or semitrailers being moved from one farm to another farm owned or operated by the same person within a radius of 10 miles. This limitation also shall not apply to a combination of vehicles coupled together by a saddle mount device used to transport motor vehicles in a drive-away service when not more than two saddle mounts are used. Vehicles coupled together by not more than three saddle mounts shall not exceed 75 feet when operated on any primary highway as designated by the Commonwealth Transportation Board and shall not exceed 97 feet when operated on the National Network of interstate and primary highways as designated under 23 CFR 658.5, as amended. Use of saddle mounts as provided in this section shall be in conformity with safety regulations adopted by the federal Department of Transportation. The Commissioner of Highways shall designate reasonable access to terminals and facilities for food, fuel, repairs, and rest. The governing body of any city may by ordinance permit motor vehicles to be driven on the highways of their respective cities while drawing or having attached thereto more than one other vehicle, trailer, or semitrailer.