TMH13: roughness measurement and IRI
IRI, measurement context and calibration sections
What this reference covers
IRI describes a standardised response to a longitudinal road profile. Keep the measurement method, wheelpath, section and quality evidence with the result.
Interpretation and limits
Table C.5 in Part C is used for calibration-section selection. It is not a universal maintenance-treatment classification.
Follow the evidence
Record the exact source edition and the applicable project requirements. Educational summaries do not establish product or project compliance.
Reference
COTO (2016) TMH13, Part C: Roughness. Committee Draft Final, May. Section C.3.1.1. Original source (Accessed: 5 September 2026).
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