Document ID: chunk:federal_register_of_legislation:F2018L01515:body:0:p9
Version: federal_register_of_legislation:F2018L01515
Segment Type: other
Provision Reference: 
Character Range: 25606–28436

the way the steering forces are produced, the following types of equipment are distinguished:
2.5.1. For motor vehicles:
2.5.1.1. "Main steering system" means the steering equipment of a vehicle which is mainly responsible for determining the direction of travel. It may comprise:
2.5.1.1.1. "Manual steering equipment" in which the steering forces result solely from the muscular effort of the driver;
2.5.1.1.2. "Power assisted steering equipment" in which the steering forces result from both the muscular effort of the driver and the energy supply (supplies).
2.5.1.1.2.1. Steering equipment in which the steering forces result solely from one or more energy supplies when the equipment is intact, but in which the steering forces can be provided by the muscular effort of the driver alone if there is a fault in the steering (integrated power systems), is also considered to be power assisted steering equipment;
2.5.1.1.3. "Full-power steering equipment" in which the steering forces are provided solely by one or more energy supplies;
2.5.1.2. "Self-tracking steering equipment" means a system designed to create a change of steering angle on one or more wheels only when acted upon by forces and/or moments applied through the tyre to road contact.
2.5.1.3. "Auxiliary Steering Equipment (ASE)" means a system in which the wheels on axle(s) of vehicles of categories M and N are steered in addition to the wheels of the main steering equipment in the same or opposite direction to those of the main steering equipment and/or the steering angle of the front and/or the rear wheels may be adjusted relative to vehicle behaviour.
2.5.2. For trailers:
2.5.2.1. "Self-tracking steering equipment" means a system designed to create a change of steering angle on one or more wheels only when acted upon by forces and/or moments applied through the tyre to road contact.
2.5.2.2.  "Articulated steering" means equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steered trailer wheels is linked to the relative angle between the longitudinal axis of the towing vehicle and that of the trailer.
2.5.2.3. "Self-steering" means equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steered trailer wheels is firmly linked to the relative angle between the longitudinal axis of the trailer frame or a load replacing it and the longitudinal axis of the sub-frame to which the axle(s) is (are) attached.
2.5.2.4. "Additional steering equipment" means a system, independent of the main steering system, by which the steering angle of one or more axle(s) of the steering system can be influenced selectively for manoeuvring purposes.
2.5.2.5. "Full-power steering equipment" means