Document ID: chunk:federal_register_of_legislation:F2025C00107:reg:4:p10
Version: federal_register_of_legislation:F2025C00107
Segment Type: reg
Provision Reference: reg 4 (pt 10/26)
Character Range: 113347–116390

steering, from the tests conducted in accordance with clause 6.1.2 of Annex 1 to this appendix, must not exceed VRmax.
where:
; and
       R = the fixed radius (in metres) of the 'J-Turn Test Course' (measured from the centre of the lane) selected by the 'Manufacturer'.
 1.                            Engine torque reduction
     1.                     Category ME vehicles with a 'GVM' exceeding 12 tonnes and category NC 'Prime Movers' must satisfy the criteria of clauses 4.2.1.1 and 4.2.1.2 below, during at least two of each series (clockwise and anti‑clockwise) of not more than four consecutive tests, conducted in accordance with clause 6.2 of Annex 1 to this appendix.
         1.                 The 'Vehicle Stability Function' must reduce the driver-requested engine torque by at least 10 per cent for a minimum continuous duration of 0.5 second during the time period from 1.5 seconds after the vehicle crosses the start gate to when it crosses the end gate.
         2.                 The wheels of the 'Prime Mover' or Omnibus must remain within the lane between the start gate and the end gate.
 2.                            Directional Control and Roll-over Control requirements[9]
     1.                     Category ME vehicles with a 'GVM' exceeding 12 tonnes and category NC 'Prime Movers' must satisfy the criteria of clauses 4.3.1.1 to 4.3.1.4 below, during at least six of each series (clockwise and anti-clockwise) of not more than eight consecutive tests, conducted in accordance with clause 6.3 of Annex 1 to this appendix.
         1.                 The vehicle speed measured at 3.0 seconds after the vehicle crosses the start gate must not exceed V3max.
          where:
; and
       R = the fixed radius (in metres) of the 'J-Turn Test Course' (measured from the centre of the lane) selected by the 'Manufacturer'.
 1.                 The vehicle speed measured at 4.0 seconds after the vehicle crosses the start gate must not exceed V4max.
where:
; and
R = the fixed radius (in metres) of the 'J-Turn Test Course' (measured from the centre of the lane) selected by the 'Manufacturer'.
 1.                 The wheels of the 'Prime Mover' or Omnibus must remain within the lane between the start gate and the end gate.
 2.                 There must be 'Vehicle Stability Function Service Brake Application'.

 1.                                  Use of a dynamic stability simulation
     1.                            Once a particular variant (a 'reference variant') of a vehicle type has been demonstrated to comply with the performance requirements of clause 4 above, the compliance of other variants of the same type, may be determined using a computer simulation in accordance with Annex 2 to this 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