South Australian Numbered Regulations

ROAD TRAFFIC (LIGHT VEHICLE STANDARDS) RULES 2018 (NO 5 OF 2018) - REG 122

122—Performance of braking systems

        (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 subrules (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 metres wide.

        (2)         The braking system of a motor vehicle or combination with a gross mass under 2.5 tonnes must bring the vehicle or combination from a speed of 35 kilometres an hour to a stop within—

            (a)         12.5 metres when the service brake is applied; and

            (b)         30 metres when the emergency brake is applied.

        (3)         The braking system of a motor vehicle or combination with a gross mass of at least 2.5 tonnes must bring the vehicle or combination from a speed of 35 kilometres an hour to a stop within—

            (a)         16.5 metres when the service brake is applied; and

            (b)         40.5 metres when the emergency brake is applied.

        (4)         The braking system of a motor vehicle or combination with a gross mass under 2.5 tonnes must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least—

            (a)         3.8 metres a second when the service brake is applied; and

            (b)         1.6 metres a second when the emergency brake is applied.

        (5)         The braking system of a motor vehicle or combination with a gross mass of at least 2.5 tonnes must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least—

            (a)         2.8 metres a second when the service brake is applied; and

            (b)         1.1 metres a second when the emergency brake is applied.

        (6)         The braking system of a motor vehicle or combination with a gross mass under 2.5 tonnes must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least—

            (a)         5.8 metres a second when the service brake is applied; and

            (b)         1.9 metres a second when the emergency brake is applied.

        (7)         The braking system of a motor vehicle or combination with a gross mass of at least 2.5 tonnes must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least—

            (a)         4.4 metres a second when the service brake is applied; and

            (b)         1.5 metres 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.

Division 2—Motor vehicle braking systems