| Title | Statistical analysis of tire treadwear data |
|---|---|
| Record ID | 33383 |
| Personal Name Creator |
Yarmus, J.; Walter, Robert; Mengert, Peter |
| Source | 92p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Department of Transportation. National Highway Traffic Safety Administration |
| Publication Date | 19850300 |
| Language | English |
| 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. |
| Rosap ID | dot:5843 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/5843 |
| TRT Terms | Statistical analysis; Tire treads; Regression analysis |
| Classification | NTL - SAFETY AND SECURITY - SAFETY AND SECURITY; NTL - SAFETY AND SECURITY - Human Factors |
| Geographical Coverage |
United States |
| OCLC | 12349808 |
| TRIS Online Accession No |
452182 |
| Report Number | DOT-TSC-NHTSA-85-2; DOT-HS-806-743 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Research Paper |
| URL | https://ntlrepository.blob.core.windows.net/lib/33000/33300/33383/33383.pdf |
| Format | |
| Database | NTL Digital Repository |