ASTM WK40015

    New Test Method for Determining Side Force Friction on Paved Surfaces Using a Tire at 20 Degrees to Measure Sideway Force Coefficient (SFC)

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    Developed by Subcommittee: E17.21 | Committee E17 | Contact Staff Manager


    1. Scope

    1.1 This test method covers the measurement of the side force friction of paved surfaces using a tire mounted at 20 degrees, herein referred to as the Device. 1.2 This test method utilizes a measurement obtained by a Device, containing one freely rotating test wheel angled to the direction of motion, and operated over a pavement surface at a constant speed while the test wheel is under a vertical load. The test equipment has been built onto a number of different vehicle chassis and functions independently of vehicle choice. This method provides data of the side force friction (and other data) along the whole length of the test surface being tested. 1.3 The values stated in SI units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See also Section 6.


    skid resistance; friction; continuous friction; pavements; routine friction testing; fixed slip; side force friction; friction testing; pavement friction management


    Continuous friction measuring equipment (CFME) is commonly used to manage airfield pavements, but rarely applied in the highway field in the United States. The 20-degree sideway force device described in this draft standard is one CFME with which there is substantial international experience with highway testing, experience that now includes limited use in the United States. An ASTM standard for the 20-degree sideway force device would expand the availability of continuous friction technology to a broad field of pavement managers. A standard for a system with substantial in-service performance history opens a wider door for all CFME equipment to highway application. Potential users of such standards include US State agencies and other federal agencies beyond Europe.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    Kevin Mc Ghee

    Draft Under Development