Document ID: chunk:federal_register_of_legislation:F2023L01006:front:0:p6
Version: federal_register_of_legislation:F2023L01006
Segment Type: other
Provision Reference: 
Character Range: 16743–19792

UN Regulation No. 46. provides the provisions for indirect vision of motor vehicles. This Regulation expands driver's awareness behind vehicles when reversing. Therefore, some requirements of this Regulation may be satisfied by devices complying with UN Regulation No.46.

This Regulation cannot cover all the traffic conditions and infrastructure features in the type approval process; this Regulation recognises that the performances required in this Regulation cannot be achieved in all conditions (vehicle speed and condition, weather conditions, and traffic scenarios etc. may affect the system performances).

         1. Scope
         This Regulation applies to:
         1.1. Approval of devices for means of rear visibility defined in Part I intended to be fitted to vehicles of category M and N.
         1.2. Approval of vehicle installation of means of rear visibility or detection defined in Part II if fitted to vehicles of category M and N.
         1.3. At the request of the manufacturer, Contracting Parties may grant approvals under Parts I and II to vehicles of other categories and devices for fitting to such vehicles.
         1.4.  The following vehicles of category M and N shall be exempted from this Regulation:
          Vehicles where installation of means of rear visibility or detection is incompatible with their on-road use may be partly or fully exempted from this Regulation, subject to the decision of the Type Approval Authority.
         1.5. If a vehicle has multiple device(s), the manufacturer shall designate the device that meets the provisions of the regulation.
Part I Devices for means of rear visibility
         2. Definitions
For the purposes of this Regulation:

         2.1. "Devices for means of rear visibility or detection" means devices intended, when reversing, to give a clear view of the rear of the vehicle within the fields of vision defined in paragraph 15.2. or intended to detect objects in the field of detection defined in paragraph 15.3.
         These can be conventional mirrors, Rear-View Camera System, detection systems or other devices.
         2.1.1. "Close-proximity rear-view device" means a device that gives the field of vision defined in paragraph 15.2. of this Regulation.
         2.1.2. "Devices for means of rear visibility" means devices that present information of the fields of vision defined in paragraph 15.2.
         2.1.2.1. "Rear-View Camera system (RVCS)" means any system intended to render an image of the outside world and give a clear view to the rear of the vehicle within the fields of vision defined in paragraph 15.2. by means of camera.
         2.1.2.1.1. "Luminance contrast" means the brightness ratio between an object and its immediate background/surrounding that allows the object to be distinguished from its background/surroundings. The definition is in accordance with the definition given in ISO 9241-302:2008.
         2.1.2.1.2. "Resolution" means the smallest detail that can be discerned with a perceptual system, i.e. perceived as