128Performance of braking systems

128 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 a second when the service brake is applied; and (b) 1.6 metres a second 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 a second when the service brake is applied; and (b) 1.1 metres a second 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 a second when the service brake is applied; and (b) 1.9 metres a second 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 a second when the service brake is applied; and (b) 1.5 metres 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.