An analysis of tire tread wear groove patterns and the effect of heteroscedasticity on tire tread wear statistics

Walter, Robert; Mengert, Peter; Salvatore, S

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An analysis of tire tread wear groove patterns and the effect of heteroscedasticity on tire tread wear statistics

1985-09-01
By Walter, Robert ; Mengert, Peter ; Salvatore, S

File Language:

English

Details

Creators:

Walter, Robert ; Mengert, Peter ; Salvatore, S
Corporate Creators:

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

DOT-TSC-NHTSA-85-3 ; DOT-HS-806-813
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report; June 1984 - March 1985
Corporate Publisher:

United States. Department of Transportation. National Highway Traffic Safety Administration
Abstract:

This report examines the groove wear variability among tires subjected to the ; Uniform Tire Quality Grading (UTQC) test procedure for determining tire tread wear. ; The effects of heteroscedasticity (variable variance) on a previously reported ; statistical analysis were also examined. Two data sources were used: special tire ; tests performed by the Southwest Research Institute (SWRI) for NHTSA, and NHTSA's ; own compliance tests. The test concluded that groove wear variability exists ; during UTQG testing with the outside grooves generally wearing more than the inside ; grooves. The difference in wear between the inside and outside grooves varied from ; approximately 10 percent to 50 percent. This variability was different for different ; types but was uniform within the tire types during a test. However, in tests ; spaced apart in time, this within tire type groove variability will change and is ; probably influenced by environmental conditions. It was also concluded that ; heteroscedasticity would have no effect on previously reported statistical results ; but that this effect could be meaningful on an individual tire basis.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/5836/dot_5836_DS1.pdf
File Type:

[PDF - 2.37 MB]
Collection(s):

Volpe Center ; US Transportation Collection
Main Document Checksum:

urn:sha-512:f7ac6c5d79a4030229e803f142dddcbfefa9cfb9820f1d070c41f220d7c8c7f0b0e25a09d99f4d08a1e8dfd6dd913f13554966879dd8bb2f80676d3573f1a468

File Language:

English

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