Road Roughness

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.

Related Pages

External Links & References

  1. WSDOT Pavement Guide
  2. Pavement Interactive
  3. Google Search
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