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- W621239143 abstract "Distress data are an important element of the Long-Term Pavement Performance (LTPP) program since distresses are a primary performance measure. To promote distress data uniformity and consistency, standard definitions, measurement procedures, equipment, data collection forms and distress rater accreditation workshops were implemented. Since distress identification and quantification requires subjective interpretation by a rater, rater variability is a primary concern. The level of variability in the LTPP manually collected distress data was first quantified in 1997 based on the data from nine rater accreditation workshops. An additional 13 distress rater accreditation workshops have been conducted since, more than doubling the amount of data previously available. This follow-up study was undertaken to examine possible changes to the original bias, precision and variability of the data. The results of this update show that little change has occurred since 1997 and provide confirmation of the results of the previous study." @default.
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- W621239143 date "2007-01-01" @default.
- W621239143 modified "2023-09-23" @default.
- W621239143 title "Updated LTPP Manual Distress Data Bias and Precision Estimates" @default.
- W621239143 hasPublicationYear "2007" @default.
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