Document ID: chunk:federal_register_of_legislation:F2025C00108:reg:4:p13
Version: federal_register_of_legislation:F2025C00108
Segment Type: reg
Provision Reference: reg 4 (pt 13/25)
Character Range: 121745–124787

depicted in Figure 2 defining the lane width are positioned solely for illustrative purposes.

       FIGURE 2

              Example of a suitable 'J-Turn Test Course' for a 'Prime Mover'
(note: the 'J-Turn Test Course' shown below, corresponds to that used in the United States Federal Motor Vehicle Safety Standard No. 136 (49 CFR 571.136) – 10-1-19 edition)

 1.                                  Control trailer specifications
     1.                            The 'Control Trailer' is an un-braked, flatbed 'Semi-trailer' with one 'Axle' with a 'GALR' of at least 8,000 kg.
     2.                            The distance from the 'Point of Articulation' to the transverse centreline of the 'Axle' of the 'Control Trailer', must be at least 6,400 mm, but no more than 7,010 mm.
     3.                            The 'Control Trailer' is equipped with outriggers with a maximum mass not exceeding 1,134 kg (excluding mounting fixtures).

 2.                                  Pre-test procedures
     1.                            Establishing the vehicle test mass
         1.                     A category NC 'Prime Mover' must be loaded to 'GVM' by coupling it to a 'Control Trailer' loaded with ballast.
             1.                 The centre of gravity of this ballast must be directly above the kingpin of the 'Control Trailer'. It is recommended that the height of the centre of gravity of the ballast on the 'Control Trailer' be limited, where possible, to no more than 610 mm above the top of the 'Prime Mover's' 'Fifth Wheel Assembly'.
             2.                 In the case of a 'Prime Mover' with an adjustable 'Fifth Wheel Assembly', the 'Fifth Wheel Assembly' must be adjusted to proportionally distribute the load on each of the 'Prime Mover's' 'Axle(s)', according to the 'GALR' of each 'Axle', without exceeding the 'GALR' of any 'Axle'.
             3.                 If the 'Fifth Wheel Assembly' cannot be adjusted to enable the 'Prime Mover' (with test driver and instrumentation on board) to be loaded to its 'GVM', without exceeding the 'GALR' of any 'Axle', the ballast on the 'Control Trailer' shall be reduced until each 'GALR' is no longer exceeded, while maintaining the distribution of load between the 'Axle(s)' of the 'Prime Mover' as close as possible to the optimum.
         2.                     A category ME omnibus with a 'GVM' exceeding 12 tonnes must be loaded with a test driver, test instrumentation, outriggers (see clause 1.3.7 of this annex), ballast, and a simulated occupant in each of the vehicle's designated seating positions.  Occupant loads shall be simulated by securing 68 kg of ballast in each occupant seating position.  This shall be achieved in one of two ways:
                1.       A 68 kg ballast mass shall be placed to have its centre of gravity 100 mm above and 100 mm forward of the 'Seating Reference Point' (otherwise known as R Point) for each occupant seating position. It shall be fixed rigidly and securely so that it does not break away during J‑Turn