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Statistical analysis of tire treadwear data

File Language:
English


Details

  • Creators:
    Yarmus, J. ; Walter, Robert ; Mengert, Peter
  • Corporate Creators:
    John A. Volpe National Transportation Systems Center (U.S.)
  • Subject/TRT Terms:
  • Publication/ Report Number:
    DOT-TSC-NHTSA-85-2 ; DOT-HS-806-743
  • Resource Type:
    Research Paper
  • Geographical Coverage:
    United States
  • Edition:
    FINAL REPORT; August 1982 - April 1984
  • Corporate Publisher:
    United States. Department of Transportation. National Highway Traffic Safety Administration
  • Abstract:
    This report describes the results of a statistical analysis of the treadwear ; variability of radial tires subjected to the Uniform Tire Quality Grading (UTQG) ; standard. Because unexplained variability in the treadwear portion of the standard ; could lead to the misgrading of tires and provide false information to the ; consumer, the National Highway Traffic Safety Administration (NHTSA) had ; temporarily suspended the treadwear test. This report documents NHTSA's efforts ; to determine and eliminate sources of this variability. ; Data analyzed in this report were obtained from UTQG compliance tests performed ; at the San Angelo, TX test track, and from various tire manufacturers. Both aggregate ; and disaggregate regression analyses, as well as an analysis of variance, were ; performed. From these analyses, it is concluded that NHTSA should standardize the ; tire grade assignment procedure to ensure the true precision of the UTQG test. It is ; proposed that such standardization be accomplished either by assigning numerical grades ; with a given error range, or by assigning letter grades reflecting a range of grades.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/5843/dot_5843_DS1.pdf
  • File Type:
    Filetype[PDF - 3.28 MB]
  • Collection(s):
    Volpe Center
  • Main Document Checksum:
    urn:sha-512:feccfc1f8d6441149da30437a365766fda3077de2fb7c0d23bc6c693e2e71dd5ab59ddaef2effa6022cbfe5741501bd47d4cc8b24b6af8ae8782b856671d1553
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