What are the definitions of cars and trailers, as well as car trains in the national mark?
Trailer: a unpowered road vehicle designed for its design and technical characteristics requiring traction by the automobile. It is used for carrying persons and / or goods; for special use.
Automobile: a non rail carrying vehicle driven by power and having four or more wheels, used mainly for carrying persons and / or goods; for hauling vehicles and / or for goods; for special use, four.
A combination of a car and one or more trailersSee the terms and definitions of GB, T, 3730.1-2001, automotive and trailer types
