sch.1-sec.122Performance of braking systems

sch.1-sec.122 Performance of braking systems

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 subsections (2) to (7) — when the vehicle or combination is on a dry, smooth, level road surface, free from loose material; and whether or not the vehicle or combination is loaded; and without part of the vehicle or combination moving outside a straight path— centred on the longitudinal axis of the vehicle or combination before the brake is applied; and 3.7m wide. The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must bring the vehicle or combination from a speed of 35km/h to a stop within— when the service brake is applied—12.5m; and when the emergency brake is applied—30m. The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must bring the vehicle or combination from a speed of 35km/h to a stop within— when the service brake is applied—16.5m; and when the emergency brake is applied—40.5m. The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least— when the service brake is applied—3.8m/s 2 ; and when the emergency brake is applied—1.6m/s 2 . The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least— when the service brake is applied—2.8m/s 2 ; and when the emergency brake is applied—1.1m/s 2 . The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least— when the service brake is applied—5.8m/s 2 ; and when the emergency brake is applied—1.9m/s 2 . The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least— when the service brake is applied—4.4m/s 2 ; and when the emergency brake is applied—1.5m/s 2 . The parking brake of a vehicle or combination must be able to hold the vehicle or combination stationary on a 12% gradient— when the vehicle or combination is on a dry, smooth road surface free from loose material; and whether or not the vehicle or combination is loaded. (sch.1-sec.122-ssec.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 subsections (2) to (7) — when the vehicle or combination is on a dry, smooth, level road surface, free from loose material; and whether or not the vehicle or combination is loaded; and without part of the vehicle or combination moving outside a straight path— centred on the longitudinal axis of the vehicle or combination before the brake is applied; and 3.7m wide. (sch.1-sec.122-ssec.2) The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must bring the vehicle or combination from a speed of 35km/h to a stop within— when the service brake is applied—12.5m; and when the emergency brake is applied—30m. (sch.1-sec.122-ssec.3) The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must bring the vehicle or combination from a speed of 35km/h to a stop within— when the service brake is applied—16.5m; and when the emergency brake is applied—40.5m. (sch.1-sec.122-ssec.4) The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least— when the service brake is applied—3.8m/s 2 ; and when the emergency brake is applied—1.6m/s 2 . (sch.1-sec.122-ssec.5) The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must decelerate the vehicle or combination, from any speed at which the vehicle or combination can travel, by an average of at least— when the service brake is applied—2.8m/s 2 ; and when the emergency brake is applied—1.1m/s 2 . (sch.1-sec.122-ssec.6) The braking system of a motor vehicle or combination with a loaded mass of less than 2.5t must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least— when the service brake is applied—5.8m/s 2 ; and when the emergency brake is applied—1.9m/s 2 . (sch.1-sec.122-ssec.7) The braking system of a motor vehicle or combination with a loaded mass of 2.5t or more must achieve a peak deceleration of the vehicle or combination, from any speed at which the vehicle or combination can travel, of at least— when the service brake is applied—4.4m/s 2 ; and when the emergency brake is applied—1.5m/s 2 . (sch.1-sec.122-ssec.8) The parking brake of a vehicle or combination must be able to hold the vehicle or combination stationary on a 12% gradient— when the vehicle or combination is on a dry, smooth road surface free from loose material; and whether or not the vehicle or combination is loaded.