A correlation has been established between skid resistance measurements with the newly adopted test tire (ASTM E 501) and the previous standard test tire (ASTM E 249). 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 E 501 is expected to measure about 4 percent higher than tire E 249 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 E 501.


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    Title :

    Pavement Friction Test Tire Correlation


    Contributors:
    R. R. Hegmon (author) / S. Weiner (author) / L. J. Runt (author)

    Publication date :

    1975


    Size :

    182 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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