Document ID: chunk:federal_register_of_legislation:F2025C00113:reg:4:p4
Version: federal_register_of_legislation:F2025C00113
Segment Type: reg
Provision Reference: reg 4 (pt 4/10)
Character Range: 79953–83301

At speeds exceeding 15 km/h the wheels on the 'Axle(s)' specified in clause 2.1 of this appendix must remain unlocked when a 'Control Signal' of 1.0 'E' (650 kPa) is suddenly applied from an initial speed of 40 km/h +5 to -1 km/h and from an initial speed of at least 80 km/h on a road surface having approximately uniform surface friction on both sides of the trailer.
                1.                     This test is to be performed according to the general test conditions of clause 10 with the trailer laden to both 'Lightly Laden Test Mass' and 'Maximum Loaded Test Mass'.
                2.                     Brief periods of locking of the wheels are allowed, but stability must not be affected.
            2.                            The operation of an 'Antilock System' must not be adversely affected by magnetic or electric fields.

 1.                                  Installation requirements
     1.                            An 'Antilock System' complying with clause 1 of this appendix must be fitted to:
            1.             Each 'Single Axle';
            2.             At least one 'Axle' in any 'Tandem Axle Group';
            3.             At least two 'Axles' in any 'Triaxle Group';
            4.             At least three 'Axles' in any 'Axle Group' with four 'Axles'.

APPENDIX 3

    'Vehicle Stability Function' requirements for category TD trailers

 1.                                  Definitions
     1.                            'Automatically Commanded Braking' means a function within a complex electronic control system where actuation of the braking system(s) or brakes of certain axles is made for the purpose of generating vehicle retardation with or without a direct action of the driver, resulting from the automatic evaluation of on board initiated information.
     2.                            'Directional control' means a function within a 'Vehicle Stability Function' that assists the driver, in the event of understeer and oversteer conditions, within the physical limits of the vehicle in maintaining the direction intended by the driver in the case of a power-driven vehicle, and assists in maintaining the direction of the trailer with that of the towing vehicle in the case of a trailer.
     3.                            'Roll-over control' means a function within a 'Vehicle Stability Function' that reacts to an impending roll-over in order to stabilise the power-driven vehicle or towing vehicle and trailer combination or the trailer during dynamic manoeuvres within the physical limits of the vehicle.
     4.                            'Selective Braking' means a function within a complex electronic control system where actuation of individual brakes is made by automatic means in which vehicle retardation is secondary to vehicle behaviour modification.
     5.                            'Vehicle Stability Function' means an electronic control function for a vehicle which improves the dynamic stability of the vehicle.  A 'Vehicle Stability Function' includes one or both of the following:
(a) 'Directional Control';
(b) 'Roll-over Control'.

 1.                                  Functional requirements
     1.                            For each category TD trailer required to be equipped with a 'Vehicle Stability Function' as defined above, the following