Pavement Inspection

Slippage Cracking

Slippage cracks are crescent or half-moon shaped cracks, usually transverse to the direction of travel. They are produced when braking or turning wheels cause the pavement surface to slide or deform. This distress usually occurs in overlaps when there is a poor bond between the surface and the next layer of the pavement structure.

Severity Description
Low Average crack width is less than 3/8 in (10 mm).
Medium One of the following conditions exists: average crack width is between 3/8 and 1 1/2 in (10 and 40 mm) or the area around the crack is moderately spalled, or surrounded with secondary cracks.
High One of the following conditions exists: the average crack width is greater than 1 1/2 in (40 mm) or the area around the crack is broken into easily removed pieces.