Statistical analysis of tire treadwear data

Yarmus, J.; Walter, Robert; Mengert, Peter; John A. Volpe National Transportation Systems Center (U.S.)

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Statistical analysis of tire treadwear data

1985-03-01
By Yarmus, J. ; Walter, Robert ; Mengert, Peter

[PDF-3.28 MB]

English

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Details:

Creators:

Yarmus, J. ; Walter, Robert ; Mengert, Peter

Yarmus, J. ; Walter, Robert ; Mengert, Peter Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Regression Analysis Statistical Analysis Tire Treads
Publication/ Report Number:

DOT-TSC-NHTSA-85-2 ; DOT-HS-806-743

DOT-TSC-NHTSA-85-2 ; DOT-HS-806-743 Less -
Resource Type:

Research Paper
OCLC Number:

12349808
Edition:

FINAL REPORT; August 1982 - April 1984
Corporate Publisher:

United States. National Highway Traffic Safety Administration
NTL Classification:

NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Human Factors;
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
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:9d61e3ec98604fea696d443b92328daeaedc2a4afba40abdc2c661468d4021d9
Download URL:

https://rosap.ntl.bts.gov/view/dot/5843/dot_5843_DS1.pdf
File Type:

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Statistical analysis of tire treadwear data

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