Pavement friction test tire correlation /

A correlation has been established between skid resistance measurements with the newly adopted test tire (ASTM E501) and the previous standard test tire (ASTM E249). The correlation is based on a large scale field test program, supported by laboratory tests on a high speed facility. Both tires respo...

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Bibliographic Details
Main Author:	Hegmon, R. R.
Corporate Authors:	United States. Federal Highway Administration, United States. Federal Highway Administration. Offices of Research and Development
Other Authors:	Weiner, S., Runt, L. J.
Format:	Book
Language:	English
Published:	Washington, D.C. : U.S. Dept. of Transportation, Federal Highway Administration ; 1975.
Subjects:	Automobiles > Tires > Testing. Tires > Traction. Pavements > Skid resistance. Automobiles > Skidding. Skid resistance tests. Correlation analysis. Tires.

Description
Summary:	A correlation has been established between skid resistance measurements with the newly adopted test tire (ASTM E501) and the previous standard test tire (ASTM E249). The correlation is based on a large scale field test program, supported by laboratory tests on a high speed facility. Both tires respond in a similar way to changing test conditions, but tire E501 is expected to measure about 4 percent higher than tire E249 under standard test conditions at 40 mph. Prediction equations and the associated estimated variances are given for an all-inclusive correlation, as well as separate equations for three speeds (20, 40, and 60 mph) and separate equations for each of the four pavements used in this program. Limited tests on dry pavements also show generally higher readings with tire E501.
Item Description:	"April 1975." "Final report." "FHWA-RD-75-88."
Physical Description:	vii, 172 pages : illustrations ; 28 cm.
Bibliography:	Includes bibliographical references.