Measurement methods. 5.6.4.1. Measuring points expressed in degrees of angle with the axis of reference are shown in Figure A4-XI. 5.6.4.2. Horizontal and vertical angles for the field of geometric visibility are shown in Figures A4-XII and A4-XIII. The directions H = 0° and V = 0° correspond to the axis of reference. On the vehicle they are horizontal, parallel to the median longitudinal plane of the vehicle and oriented in the required direction of visibility. They pass through the centre of reference.
Appears in 3 contracts
Sources: Agreement Concerning the Adoption of Harmonized Technical United Nations Regulations for Wheeled Vehicles, Agreement Concerning the Adoption of Harmonized Technical United Nations Regulations for Wheeled Vehicles, Agreement Concerning the Adoption of Harmonized Technical United Nations Regulations for Wheeled Vehicles