Corrugation
Corrugation is a series of closely spaced ridges and valleys (ripples) occurring at fairly regular intervals (usually less that 5 ft [1.5 m]) along the pavement. The ridges are perpendicular to the traffic direction. Traffic action combined with an unstable pavement surface or base usually causes this type of distress.
Severity | Distress Example | Description |
Low | No Photo | Corrugations are minor and do not significantly affect ride quality.
Runways and High-Speed Taxiways: < 1/4 in (6 mm) Taxiways and Aprons: < 1/2 in (13 mm) |
Medium | No Photo | Corrugations are noticeable and significantly affect ride quality.
Runways and High-Speed Taxiways: 1/4 to 1/2 in (6 to 13 mm) Taxiways and Aprons: 1/2 to 1 in (13 to 25 mm) |
High | | Corrugations are easily noticed and severely affect ride quality.
Runways and High-Speed Taxiways: > 1/2 in (13 mm) Taxiways and Aprons: > 1 in (25 mm) |