Hello; The Canadian invented multi purpose car trailer is a great thing for the future! It's sometimes impossible to get a return load for a car transporter, which is one of the most interesting and good ideas here. Commercial-size car carrying trailers are commonly used to ship new cars from the manufacturer to auto dealerships. In the United States, shipping of used vehicles is also a big industry, employed by car owners who are relocating and choose to ship their cars instead of driving, as well as consumers who have just purchased a vehicle on the second-hand market and need it delivered to their location. Like other semi-trailers, most commercial car carrier trailers attach to the tractor using a fifth wheel coupling. Trailers can either be enclosed, possessing walls like a conventional box trailer, which affords the shipped vehicles more protection at the cost of lower capacity; or open, as in the commonly seen skeletal tube steel design, which exposes the vehicles to the elements but allows for greater carrying capacity. An American commercial car carrier typically fits between 5 and 9 cars, depending on the car size and trailer model. Significantly higher-capacity vehicles have been observed around the world, such as a side-by-side loading Chinese model.