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AASHTO T 242

Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire

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Organization: AASHTO
Publication Date: 1 January 2018
Status: active
Page Count: 11
scope:

This method covers the measurement of the frictional properties of paved surfaces with a specified full-scale automotive tire.

This method utilizes a measurement representing the steady-state friction force on a locked test wheel as it is dragged over a wetted-pavement surface under constant load and at a constant speed while its major plane is parallel to its direction of motion and perpendicular to the pavement.

The values measured represent the frictional properties obtained with the equipment and procedures stated herein and do not necessarily agree or correlate directly with those obtained by other pavement friction measuring methods. The values are intended for use in comparing certain frictional properties of a pavement relative to those of other pavements or for evaluating changes in these frictional properties of a pavement with the passage of time. The values are insufficient to determine the distance required to stop a vehicle on either a wet or a dry pavement. They are also insufficient for determining the speed at which control of a vehicle would be lost, because peak and side-force friction are also required for these determinations.

The values stated in SI units are to be regarded as the standard.

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

Document History

AASHTO T 242
January 1, 2018
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
This method covers the measurement of the frictional properties of paved surfaces with a specified full-scale automotive tire. This method utilizes a measurement representing the steady-state...
January 1, 1996
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
This method covers the measurement of the frictional properties of paved surfaces with a specified full-scale automotive tire. This method utilizes a measurement representing the steady-state...
January 1, 1996
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
This method covers the measurement of the frictional properties of paved surfaces with a specified full-scale automotive tire.  This method utilizes a measurement representing the steady-state...
January 1, 1996
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
A description is not available for this item.
January 1, 1996
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
This method covers the measurement of the frictional properties of paved surfaces with a specified full-scale automotive tire. This method utilizes a measurement representing the steady-state...
January 1, 1996
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
A description is not available for this item.
January 1, 1995
Standard Specification for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
A description is not available for this item.
January 1, 1995
Standard Specification for Frictional Properties of Paved Surfaces Using a Full-Scale Tire
A description is not available for this item.
January 1, 1992
Standard Method of Test for Frictional Properties of Paved Surfaces Using a Full-Scale Tire (ASTM E274-85)
A description is not available for this item.

References

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