6- Rutting: --------------- Description: Ruts are vertical deformations in the pavement surface along the wheel tracks. In severe cases pavement uplift may occur along the sides of the rut, but in most instances only a depression is noticeable. ------------------------------------------- Possible Causes: -------------------- consolidation or lateral movement of any or all pavement layers, including subgrade, under traffic. ------------------------------------------- Severity Level: ------------------ Low: Barely noticeable, depth less than 6 mm (1/4 inch). Medium: Readily noticeable, depth more than 6 mm (1/4 inch), less than 25 mm (1 inch). High: Definite effect upon vehicle control, depth greater than 25 mm (1 inch). ------------------------------------------- Extent Level: ---------------- Occasional: Less than 20% of the section length is rutted. Frequent: Between 20% & 50% of the section length is rutted. Extensive: More than 50% of the section length is rutted.
Posted on: Sat, 27 Sep 2014 20:40:08 +0000
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