Document ID: chunk:federal_register_of_legislation:F2024C01065:body:0:p25
Version: federal_register_of_legislation:F2024C01065
Segment Type: other
Provision Reference: 
Character Range: 61474–64590

Vehicle' (ADR 28/01).

   OPACIMETER - An instrument designed for continuous measurement of the 'Light Absorption Coefficients' of the exhaust gases emitted by 'Engine Systems' (ADR 30).

   OPENING - the maximum unobstructed aperture between the top edge of a power window and any part of the structure which forms the boundary of the window when viewed from the interior of the vehicle. To measure an opening, cylindrical test rods must be placed (without exerting force) from the interior of the vehicle as shown in figure 6 in ADR 42/03.

   OPERATIONAL DESIGN DOMAIN - the specific conditions under which an automated vehicle is intended to drive in the automated mode, including at least the roadway types, geographic area, speed range, environmental conditions (weather as well as day/night time) and other domain constraints.

   OUTBOARD SEATING POSITION - a front- or rear-facing seating position nearest a vehicle side wall where any part of the top surface of the 'Seat' cushion is within 200 mm of this side wall.

   OVERALL GEAR RATIO - the ratio of the engine output shaft rotational speed to the vehicle driven with rotational speed calculated disregarding slip in any fluid coupling device (ADR 28).

   OVERALL TYRE WIDTH - the linear distance between the exteriors of the 'Sidewalls' of an inflated tyre, including elevations due to labelling, decorations, or protective bands or rib.

   OVERALL WIDTH - subject to the additional requirements below, the maximum distance measured across the vehicle body including wheel guards, but excluding:

         1.                 rear vision mirrors (also referred to in the ADRs as rear-view mirrors);
         2.                'Prescribed Devices for Indirect Vision';
         3.                 any other devices to enable the driver to see objects in an area adjacent to the vehicle, including 'Cross-View Mirrors';
         4.                monitoring devices fitted as part of an 'Automated Driving System' and/or a 'Close-Proximity Information System';
         5.                 signalling devices and side-mounted lamps and reflectors;
         6.                 permanently fixed webbing-assembly-type devices such as curtain-side devices, provided the maximum distance across the body of the vehicle, including any part of the devices, is not more than 2,550 mm;
         7.                central tyre inflation systems;
         8.                tyre pressure gauges;
         9.                  anti-skid devices mounted on wheels; and
        10.                  the deflected part of the tyre sidewalls, including any elevations due to labelling/marking, decoration and protective bands or ribs, between the lowest point of each tyre rim and the ground (i.e. load induced tyre bulge).

   The total lateral protrusion beyond the 'Overall Width' of the devices excluded under parts (c), (d), (f), (h) and (i) above (or the excluded parts thereof), must not exceed 100 mm. The total lateral protrusion is the sum of the maximum lateral protrusion on the left side of the vehicle and the maximum lateral protrusion on the right side