Document ID: chunk:federal_register_of_legislation:F2025C00107:reg:4:p12
Version: federal_register_of_legislation:F2025C00107
Segment Type: reg
Provision Reference: reg 4 (pt 12/26)
Character Range: 119095–122113

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 'Control Trailer' loaded such that the required mass and mass distribution of the 'Prime Mover' is achieved.
         6.                     In the case of a category NC 'Prime Mover', an anti-jackknife system that allows a minimum articulation angle of 30 degrees between the 'Prime Mover' and a 'Semi-trailer', should (at the option of the 'Manufacturer') be fitted for each test.
         7.                     Outriggers with a maximum mass not exceeding 1,134 kg (excluding mounting fixtures) should be attached to each vehicle.
         8.                     A vehicle equipped with a differential locking mechanism, and/or a front wheel drive system that is engaged and disengaged by the driver, must be tested with these systems disengaged.
         9.                     Any 'Retractable Axle' must automatically assume or be set to the 'Fully‑down' position for each J-Turn test.
        10.                 The transmission selector control must be in a forward gear appropriate for the speed during each J‑Turn test.
        11.                 A vehicle equipped with an engine braking system that is engaged and disengaged by the driver must be tested with the system disengaged.

 1.                                  J-Turn Test Course specifications
     1.                            The 'J-Turn Test Course' shall consist of a straight entrance lane with a length of 22.9 metres, tangentially connected to a curved lane section with a fixed radius of between 35.0 metres and 50.0 metres inclusive, when measured from the centre of the lane.  The same fixed radius must be used for each series of J‑Turn tests.
     2.                            For a category NC 'Prime Mover', the lane width of the 'J-Turn Test Course' is 3.7 metres.  For a category ME omnibus with a 'GVM' exceeding 12 tonnes, the lane width of the 'J‑Turn Test Course' is 3.7 metres for the straight section and is 4.3 metres for the curved section.
     3.                            The start gate is the tangent point on the radius (the intersection of the straight lane and the curved lane sections) and is designated as zero degrees of radius of arc angle.
     4.                            The end gate is the point on the radius that is 120 degrees of radius arc angle measured from the tangent point.
         1.                     As an alternative, the 'Manufacturer' may elect to move the end gate to any point between 95 degrees and 120 degrees of radius arc angle, provided all performance requirements in clause 4 of APPENDIX 3 are met before the test vehicle crosses the end gate.
     5.                            Figure 2 shows an example of a suitable 'J-Turn Test Course' for a 'Prime Mover', with the curved lane section configured in the anti-clockwise