scope:

This standard test method measures the skid resistance on paved surfaces (clean or contaminated) using a fixed braking slip technique. It is primarily intended to measure at or near the maximum skid resistance value but can be used for other braking slip rates. It utilizes a measurement obtained by forcing a test tire to roll at a fixed braking slip over a wetted pavement surface at a constant speed while the test tire is under a dynamically suspended fixed load. The method provides a record of the braking friction along the whole length of the test surface and enables averages to be obtained for any specified test length.

The values stated in SI units are to be regarded as the standard. The values in parentheses are in. inch-pound units and are not exact equivalents; therefore, each system must be used independent of the other, without combining values in any way.

This test method may involve hazardous materials, operations, and equipment. It does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.