VMM Software

The Testers Manual

3.10 Brake Efficiency Table




Classes 3,4 & 7 Minimum Brake Efficiencies Required
Vehicles with 4 or more wheels having a service brake (foot-brake) operating on at least 4 wheels and a parking (handbrake) operating on at least 2 wheels.
Service Brake
Parking Brake
Vehicle with a single line braking system
Vehicle with a split (dual) braking system
Vehicles with 3 wheels with a service brake operating on ALL wheels and a parking brake operating on at least one wheel which were first used: 
50%
25%
16%
i. before 1 January 1968
40%
25%
16%
 ii. on or after 1 January 1968
50%
25%
16%
Vehicles first used before 1 January 1968 which do NOT have one means of control operating on at least 4 wheels (or 3 for three wheeled vehicle) and which have one brake system with two means of control or two brake systems with separate means of control.
30% for first means of control
25% for second means of control
Vehicles first used before 1 January 1915
one efficient braking system required
Class 5
Minimum Brake Efficiencies Required
 
Service
Brake
Parking Brake
Vehicle with a single line braking system
Vehicle with a split (dual) braking system
Buses first used on or after 1 January 1968
50%
25%
16%
Buses first used before 1 January 1968
45%
20%
No Specific Requirement (see Note 1)
Note 1:  On vehicles first used before 1 January 1968 having a dual braking system, the parking brake must be capable of preventing at least two wheels from rotating when the vehicle is stationary.  There is no specified efficiency requirement.
Note 2:  16% parking brake efficiency equates to a vehicle holding on a gradient of 1 in 6.25
Issue Date 01 January 2012