Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:1:p11
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 1 (pt 11/34)
Character Range: 161917–164859

flat, horizontal portion of the road which is bounded by a plane parallel to the median longitudinal vertical plane passing through the outermost point of the vehicle on the passenger's side and which extends from 20 m behind the driver's ocular points to the horizon (see Figure 10).

       Figure 10
       Class VII fields of vision

              15.2.4.8. In the case of mirrors consisting of several reflecting surfaces which are either of different curvature or make an angle with each other, at least one of the reflecting surfaces shall provide the field of vision and have the dimensions (paragraph 6.1.2.1.2.2. of this Regulation) specified for the class to which they belong.

              15.2.4.9. Obstructions

              15.2.4.9.1. Class I rear-view devices

              The field of vision may be reduced by the presence of devices such as sun visors, windscreen wipers, heating elements and stop lamp of category S3, provided that all these devices together do not obscure more than 15 per cent of the prescribed field of vision. Headrests or framework or bodywork such as window columns of rear split doors, rear window frame shall be excluded from the calculation. This requirement shall be tested by projection on to a vertical plane at right angles to the longitudinal centre plane of the vehicle. The degree of obstruction shall be measured with the sun visors folded back.

              15.2.4.9.2. Classes II, III, IV, V, and VI devices for indirect vision and Class VII mirrors

               In the fields of vision specified above, obstruction due to the bodywork and its components, such as other cab devices for indirect vision, door handles, outline marker lights, direction indicators and front and rear bumpers, as well as reflective-surface cleaning components, shall not be taken into account if they are responsible for a total obstruction of less than 10 per cent of the specified field of vision. In the case of a vehicle designed and constructed for special purposes where, due to its special features, it is not possible to meet this requirement, the obstruction of the required field of vision of a Class VI mirror caused by the special features may be more than 10 per cent but not more than necessary for its special function.

              15.2.4.10. Test procedure

               The field of vision shall be determined by placing powerful light sources at the ocular points and examining the light reflected on the vertical monitoring screen. Other equivalent methods may be used.

              16. Requirements for devices for indirect vision other than mirrors
              16.1 Class I to IV camera-monitor devices (see Annex 12)

               Unless otherwise provided in this Regulation, the definitions and symbols used in paragraph 16.1. are in accordance with ISO 16505:2015, Chapters 3 and 4.

               Unless otherwise provided in this Regulation, the requirements