Road Roughness is a condition parameter used to measure deviations from the intended longitudinal profile of a road surface, with characteristic dimensions that affect vehicle dynamics, ride quality and dynamic pavement loading.
Alternate Definitions.
A condition parameter used to characterise deviations from the intended longitudinal profile of a road surface, with characteristic dimensions that affect vehicle dynamics (and hence road user costs) ride quality and dynamic pavement loading - Glossary of Austroads Terms.
A measure if surface irregularities with wavelengths between 0.5 and 50m in the longitudinal profile of one or two wheel tracks in a traffic lane, reported in dimensionless units as either International Roughness Index (IRI, m/km) or NAASRA Roughness Meter counts (NRM, counts/km) for the lane - Glossary of Austroads Terms.