To increase the maneuverability of aa, especially the terrain, makes for all-wheel drive (2-Axis AA) or two-wheel drive front axle (4-Axis AA). For this purpose perform rotary wheel trailers or semi-dissolution in trucks. The braking system is to slow down and complete stop (working foot brake), as well as to keep the aa on the site (parking hand brake). The service brake acting on all-wheel drive A. At each wheel set drum or disk brake mechanism which is carried out hydraulically, pneumatically or pneumohydraulic drive. In brake parts, brake shoes with friction linings are pressed during braking to the wheel brake drum or disc.
Hydraulic drive, which is often equipped with a vacuum or pneumatic amplifier is used in cars and trucks A. A. light-duty, on the other aa is set mainly pneumatic actuator, which receives compressed air from a compressor, driven by an engine A. The parking brake operates normally only on the driving wheels (either directly or through transmission). To improve the reliability of brakes used separate drive from one foot to the front and rear wheels, or duplicated rear-wheel drive. On large buses and heavy trucks A. increasingly use additional retarder, which often creates a braking torque when the engine is blocked and the outlet conduit termination of fuel supply. Used as the retarder with independent engine electric or hydraulic retarding device acting on the powertrain aa Electric aa consists of power sources (battery and mounted on the engine generator) and several consumer groups, it is necessary to operate the ignition system and engine starting, as well as for devices external and internal so as to ensure the visibility of the road ahead by 100-150 m moving with great speed and security patrol on a relatively narrow road without blinding oncoming AA) white or yellow lights (Front), indicating the Front dimensions of A.