Division 4.2.7.1 Test runF1

The following procedure applies for each test run:

1. (1)

   The tow vehicle or the tyre test vehicle is driven onto the test track in a straight line at the specified test speed 65 ± 2 km/h.

2. (2)

   The recording system is launched.

3. (3)

   Water is delivered to the pavement ahead of the test tyre approximately 0,5 s prior to brake application (for internal watering system).

4. (4)

   The trailer brakes are activated within 2 metres of a measurement point of the wetted frictional properties of the surface and sand depth in accordance with points 4 and 5 of section 3.1. The rate of braking application shall be such that the time interval between initial application of force and peak longitudinal force is in the range 0,2 s to 0,5 s.

5. (5)

   The recording system is stopped.