Road test surface. 4.2.1. Tests are conducted on a dry, uniform, solid-paved surface. Surfaces with irregularities and undulations, such as dips and large cracks, are unsuitable.
4.2.2. The road test surface has a nominal1 peak braking coefficient (PBC) of 0.9, unless otherwise specified, when measured using either:
4.2.2.1. The American Society for Testing and Materials (ASTM) E1136 standard reference test tyre, in accordance with ASTM Method E1337‑90, at a speed of 40 mph; or
4.2.2.2. The k-test method specified in Appendix 2 to Annex 6 of this Regulation.
4.2.3. The test surface has a consistent slope between level and 1 per cent.
Road test surface. 6.9.1.1 Tests are conducted on a straight lane 3.5 m width with dry, flat, asphalt or concrete-paved surface.
