Designed for the Transport of cars by road. Common Load 10-20 tonnes. An autohauler or car hauler, also known as a car-carrying trailer, car carrier trailer, or auto Transport trailer, is a type of trailer or semi-trailer designed to efficiently Transport passenger vehicles via truck. Modern car carrier trailers can be open or enclosed. Most commercial trailers have built-in ramps for loading and off-loading cars, as well as power hydraulics to raise and lower ramps for stand-alone accessibility. Disclaimer Our content is not in any way legal advice or binding. The information provided by might not be the official legal or full definition. Also when pursuing a specific transaction you are encouraged to conduct your own due diligence and to consult legal counsel as appropriate.