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Primary Topic: Surface and Other Considerations
Description: 4-page technical brief that discusses a study to investigate the changes in roughness of flexible pavements over time and their relationship to design factors, subgrade conditions and climatic conditions. Key findings were that most flexible sections showed little change in roughness over time, pavements over fine grained soils had a higher IRI, and pavements in areas with a high freezing index or a high number of freeze thaw cycles had higher IRI values.
FHWA Publication Number: FHWA-RD-98-132
Publication Year: 1998
Document Links: PDF (file size: 0.1 mb)
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