Document ID: chunk:federal_register_of_legislation:F2025C00107:reg:4:p11
Version: federal_register_of_legislation:F2025C00107
Segment Type: reg
Provision Reference: reg 4 (pt 11/26)
Character Range: 116087–119344

appendix.
         1.                     For the purposes of this clause 5.1, each variant must be equipped with the same 'Vehicle Stability Function' and the same number of axles as the 'reference variant'.
     2.                            Where a dynamic stability simulation is used to demonstrate compliance, a simulator test report must be produced, a model of which is provided in Annex 3 to this appendix, and a copy held by the 'Manufacturer'.

APPENDIX 3 – Annex 1

    'Vehicle Stability Function' test procedures for category ME vehicles with a 'GVM' exceeding 12 tonnes and category NC 'Prime Movers'

 1.                                  General test conditions
     1.                            Ambient conditions
         1.                     The ambient temperature at the test site for all J-Turn tests prescribed in this annex must be between 0 °C and 40 °C.
         2.                     The maximum wind speed at the test site for all J-Turn tests prescribed in this annex must be no greater than 5 m/s.
     2.                            Road test surface
         1.                     All J-Turn tests prescribed in this annex must be conducted on a dry, uniform, solid-paved surface. Surfaces with irregularities and undulations, such as dips and large cracks, are unsuitable.
         2.                     Unless otherwise 'Approved', the curved lane section of the 'J-Turn Test Course' must have a nominal[10] peak friction coefficient (PFC) of between 0.8 and 0.9, when measured using either:
                1.       The American Society for Testing and Materials (ASTM) E1136–93 (Reapproved 2003) standard reference test tyre, in accordance with ASTM Method E 1337–90 (Reapproved 2008), at a speed of 64.4 km/h, without water delivery; or
                2.       The k-test method specified in paragraph 1.1 of Appendix 2 to Annex 13 of Revision 8 of the United Nations Regulation No. 13 (E/ECE/324/Rev.1/Add.12/Rev.8).
         3.                     Unless otherwise 'Approved', the curved lane section of the 'J-Turn Test Course' must have a consistent slope between level and one per cent.
     3.                            Vehicle conditions
         1.                     The 'Vehicle Stability Function' must be enabled for all tests, except the 'Vehicle Stability Function' failure/defect tests (see clause 7 of this annex).
         2.                     All vehicle openings (doors, windows, bonnet, boot, cargo doors, etc.) shall be in a closed position except as required for instrumentation purposes.
         3.                     The tyres fitted to the vehicle must be of the size and type specified by the vehicle 'Manufacturer' as original equipment for the vehicle, and must be inflated to the vehicle 'Manufacturer's' recommended pressure for the 'GVM' of the vehicle.
         4.                     The 'Friction Elements' of the vehicle brakes must be of the make and grade specified by the vehicle 'Manufacturer' as original equipment for the vehicle and must not be replaced during the sequence of J-Turn tests prescribed in this annex.
         5.                     In the case of a category NC 'Prime Mover', each J-Turn test prescribed in this annex must be conducted while towing a