Document ID: chunk:federal_register_of_legislation:F2018L01521:front:0:p7
Version: federal_register_of_legislation:F2018L01521
Segment Type: other
Provision Reference: 
Character Range: 20413–23273

4.4.1. above need not be repeated; in such a case, the Regulation and approval numbers and the additional symbols shall be placed in vertical columns to the right of the symbol prescribed in paragraph 4.4.1. above.
         4.6.  The approval mark shall be clearly legible and be indelible.
         4.7.  The approval mark shall be placed close to or on the vehicle data plate.
5.  Specifications
         5.1.  Driver's field of vision.
              5.1.1.  The transparent area of the windscreen shall include at least the windscreen datum points (see Annex 4, Appendix, Figure 1):
              5.1.1.1. A horizontal datum point forward of V1 and 17° to the left (see Annex 4, Appendix, Figure 1);
         5.1.1.2. An upper vertical datum point forward of V1 and 7° above the horizontal;
         5.1.1.3. A lower vertical datum point forward of V2 and 5° below the horizontal;
              5.1.1.4. To verify compliance with the forward-vision requirement on the opposite half of the windscreen, three additional datum points, symmetrical to the points defined in paragraphs 5.1.1.1. to 5.1.1.3. above in relation to the median longitudinal plane of the vehicle, are obtained.
              5.1.2.  The angle of obstruction for each "A" pillar, as described in paragraph 5.1.2.1. below, shall not exceed 6° (see Annex 4, Appendix, Figure 3). In the case of armoured vehicles, that angle shall not exceed 10°.
              The angle of obstruction of the "A" pillar on the passenger side, as defined in paragraph 5.1.2.1.2. below, need not be determined if the two pillars are located symmetrically in relation to the median longitudinal vertical plane of the vehicle.
5.1.2.1. The angle of obstruction of each "A" pillar shall be measured by superimposing in a plane the following two horizontal sections:
                     Section 1: Starting from the Pm point situated at the location defined in paragraph 5.3.1.1. below, draw a plane forming an angle of 2° upwards in relation to the horizontal plane passing forward through Pm. Determine the horizontal section of the "A" pillar starting from the foremost point of the intersection of the "A" pillar and the inclined plane (see Annex 4, Appendix, Figure 2).
                     Section 2: Repeat the same procedure, taking a plane declining at an angle of 5° downwards in relation to the horizontal plane passing forward through Pm (see Annex 4, Appendix, Figure 2).
              5.1.2.1.1. The angle of obstruction of the "A" pillar on the driver's side is the angle formed on the plane view by a parallel, starting from E2, to the tangent joining E1 with the outer edge of section S2 and the tangent joining E2 to the inner edge of section S1 (see Annex 4, Appendix, Figure 3).
              5.1.2.1.2. The angle of obstruction of the "A" pillar on the passenger side is the angle formed on