Western Australian Current Regulations Western Australian Current Regulations (1) One sustained
application of the brake of a motor vehicle built after 1930, or a
combination that includes a motor vehicle built after 1930, must be able
to produce the performance mentioned in subregulations (2)
to (7) —
(a) when
the vehicle or combination is on a dry, smooth, level road surface, free from
loose material; and
(b)
whether or not the vehicle or combination is loaded; and
(c)
without part of the vehicle or combination moving outside a straight
path —
(i)
centred on the longitudinal axis of the vehicle or
combination before the brake was applied; and
(ii)
3.7 m wide.
(2) The braking system
of a motor vehicle with a gross mass of less than 2.5 t must bring the
vehicle from a speed of 35 km/h to a stop within —
(a)
12.5 m when the service brake is applied; and
(b)
30 m when the emergency brake is applied.
(3) The braking system
of a motor vehicle with a gross mass of 2.5 t or more must bring the
vehicle from a speed of 35 km/h to a stop within —
(a)
16.5 m when the service brake is applied; and
(b)
40.5 m when the emergency brake is applied.
(4) The braking system
of a motor vehicle with a gross mass of less than 2.5 t must decelerate
the vehicle from any speed at which the vehicle can travel, by an average of
at least —
(a)
3.8 m a second a second when the service brake is applied; and
(b)
1.6 m a second a second when the emergency brake is applied.
(5) The braking system
of a motor vehicle with a gross mass of 2.5 t or more must decelerate the
vehicle from any speed at which the vehicle can travel, by an average of at
least —
(a)
2.8 m a second a second when the service brake is applied; and
(b)
1.1 m a second a second when the emergency brake is applied.
(6) The braking system
of a motor vehicle with a gross mass of less than 2.5 t must achieve a
peak deceleration of the vehicle from any speed at which the vehicle can
travel, of at least —
(a)
5.8 m a second a second when the service brake is applied; and
(b)
1.9 m a second a second when the emergency brake is applied.
(7) The braking system
of a motor vehicle with a gross mass of 2.5 t or more must achieve a peak
deceleration of the vehicle from any speed at which the vehicle can travel, of
at least —
(a)
4.4 m a second a second when the service brake is applied; and
(b)
1.5 m a second a second when the emergency brake is applied.
(8) The parking brake
of a vehicle or combination must be able to hold the vehicle or combination
stationary on a 12% gradient —
(a) when
the vehicle or combination is on a dry, smooth road surface, free from loose
material; and
(b)
whether or not the vehicle or combination is loaded.
[Regulation 335 amended: Gazette
29 Mar 2019 p. 969‑70.]