Document ID: chunk:federal_register_of_legislation:F2025C00107:front:0:p18
Version: federal_register_of_legislation:F2025C00107
Segment Type: other
Provision Reference: 
Character Range: 52112–55252

inflated to pressures not less than those recommended by the vehicle 'Manufacturer'.
     4.                                     The 'Friction Elements' of the vehicle brakes must be of the make and grade specified by the vehicle 'Manufacturer'.
     5.                                     Decelerations must be conducted on sections of a test track or roadway that meets the following requirements:
         1.                               In the case of the Service Brake Fade Test, the surface must be substantially level and any effective upward average gradient between the start and end of each deceleration test section must not exceed one per cent.
         2.                               The requirements of this clause are deemed to be met if it is demonstrated that over the total number of brake applications of the Service Brake Fade Test sequence of clause 8.9, the total effective contribution to vehicle retardation of the deceleration test section's gradients is not greater than the vehicle retardation which would result from an average upward gradient of not more than one per cent;
         3.                               In the case of other deceleration tests, the upward gradient, if any, must not exceed one per cent.
     6.                                     Except when conducting burnishing procedures, decelerations must be conducted in a direction such that the component of wind velocity opposite to the direction of travel of the vehicle does not exceed 15 km/h.
     7.                                     Where a test requires that the gear selector be in "drive" the transmission selector control must be in the control position recommended by the 'Manufacturer' as appropriate to the speed of the vehicle at the commencement of the deceleration mode.
     8.                                     If the vehicle is not capable of attaining the initial speed requirement specified for a particular deceleration test in Table 1, then, unless otherwise specified, the initial speed must be within 10 km/h of the 'Maximum Laden Vehicle Speed'.  The Minimum 'Average Deceleration' so required must be determined from the expressions:
and

where:
S =  maximum 'Stopping Distance', in metres
V =  initial speed, in km/h
K1, K2 =  constants, dependent on test and category, (see Table 3)
u =  initial speed, in m/s
a =  minimum 'Average Deceleration', in m/s2
 1.                                     For all effectiveness, secondary brake and partial failure tests, all parts of the vehicle must remain inside a straight lane not exceeding 3.7 metres in width, the vehicle being positioned at the approximate centre of the lane at the commencement of the deceleration.
 2.                                 Except in the case of the Parking Brake Test, each test procedure may be preceded by a series of stops or decelerations, provided the temperature measured at the surface of the disc or drum does not exceed 100°C immediately prior to the commencement of the required test.
 3.                                 Except as permitted by clause 8.2 brakes must not be adjusted during testing.  Automatic brake