Council Directive 93/14/EEC (repealed)Show full title

1.1. General

1.1.1. The performance prescribed for braking devices is based on the stopping distance. The performance of a braking device is determined either by measuring the stopping distance in relation to the initial speed or by the response time of the device and the mean fully-developed deceleration.

1.1.2. The stopping distance is the distance covered by the vehicle from the moment when the driver begins to actuate the control of the device until the moment when the vehicle stops. The initial speed is the speed at the moment when the driver begins to actuate the control of the device. In the formula given below, for measurement of braking performance:

V

=

initial speed in kilometres per hour, and

S

=

stopping distance, in metres.

1.1.3. For component type-approval, the braking performance must be measured during road tests conducted under the following conditions:

1.1.3.1. the vehicle's condition as regards its mass must be as prescribed for each type of test and must be specified in the test report;

1.1.3.2. the test must be carried out at the speed and in the manner prescribed for each type of test: if the maximum speed of the vehicle does not conform to the speed prescribed, the test must be carried out under the special alternative conditions provided;

1.1.3.3. the prescribed performance must be obtained without locking of the wheel(s), without deviation of the vehicle from its course, and without any abnormal vibration;

1.1.3.4. during the tests the force applied to the brake control in order to obtain the prescribed performance must not exceed the maximum laid down for the test vehicle's category.

1.1.4. Test conditions

1.1.4.1. The service braking tests must be carried out under the following conditions:

1.1.4.1.1. at the start of the test or any series of tests the tyres must be cold and at the pressure prescribed for the load actually borne by the wheels when the vehicle is stationary;

1.1.4.1.2. the vehicle must be loaded, when required to be tested in the laden condition, with the load distributed in accordance with the manufacturer's prescription;

1.1.4.1.3. for all the type-0 tests the brakes must be cold: a brake is deemed to be cold when the temperature measured on the disc or on the outside of the drum is less than 100 °C;

1.1.4.1.4. the driver must shall be seated on the saddle as for normal driving and must maintain the same position throughout the test;

1.1.4.1.5. the test area must be level, dry and have a surface affording good adhesion;

1.1.4.1.6. the test must be performed when there is no wind liable to affect the test result.