7- Settlement: ------------------ Description: Settlement is a dip or depression in the longitudinal profile of the pavement surface. ------------------------------------------- Possible Causes: -------------------- 1- Poor support conditions. 2- Frost heave. 3- Permanent deformation of the subgrade. ------------------------------------------- Severity Level: ------------------ Low: Noticeable effect upon ride, driver able to maintain vehicle control easily. Medium: Some discomfort to passengers, driver able to maintain control with slight corrective action. High: Definite effect upon ride quality. Noticeable profile dips in settlement areas greater than 150 mm (6 inches). Poor ride corrective action needed. ------------------------------------------- Extent Level: ---------------- Occasional: Less than 2 settlements/1.6 km (per mile) of roadway. Frequent: 2 to 4 settlements/1.6 km (per mile) of roadway. Extensive: More than 4 settlements/1.6 km (per mile) of roadway.
Posted on: Sat, 27 Sep 2014 20:41:02 +0000
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