A semi-trailer requires an A2 driver's license. A semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and is equipped with a coupling device that can transfer horizontal and vertical forces to the tractor.
There are two types of semi-trailer: full trailer and semi-trailer; The total weight of a trailer borne by itself is called a full trailer; A part of the total weight of a trailer borne by the tractor is called a semi-trailer.
