The design and technical characteristics of the trailer need car traction to use. Road vehicles are used for: carrying passengers and/or goods; Special trailer drawbar drawbar drawbar trailer has at least two axle trailers: axle steering; The traction rod move in that angular direction is connected with a tractor; The traction rod moves vertically, and the connecting chassis can bear any vertical force. A semi-trailer with a hidden bracket is used as a drawbar trailer. The technical feature of bustrailer tow bar trailer is that it is used for carriers and their carry-on luggage. Towing bar trailer is equipped with towing bar according to 1.2.2 1.2.3. Tractor trailer Universal Tractor Trailer Universal Tractor Trailer Open (flat) or closed (van) cargo space dedicated to towing trailer Special Tractor Trailer According to its design and technical characteristics, the types of towing trailer are used: it needs special arrangement to carry passengers and/or goods; Perform certain transportation tasks (for example, bus trailer, fire trailer, low-board trailer, air compressor trailer, etc.). )