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8 EVALUATION — Cracks <br /> Reflection cracks f <br /> Cracks in overlays reflect the crack _ <br /> pattern in the pavement underneath. <br /> They are difficult to prevent and 3 <br /> correct. Thick overlays or reconstruction <br /> is usually required. -' <br /> �. <br /> •e <br /> Concrete joints <br /> reflected through <br /> bituminous <br /> overlay. <br /> Slippage cracks <br /> Crescent or rounded cracks in the " <br /> direction of traffic, caused by slippage <br /> between an overlay and an underlying -..� <br /> pavement. Slippage is most likely to ,,,� �� , • ,® <br /> occur at intersections where traffic is r • L `� <br /> stopping and starting.n Repair it by removing the top surface and • - <br /> resurfacing using a tack coat. ' <br /> J <br /> Crescent- `� <br /> shaped cracks <br /> characteristic <br /> of slippage. <br /> ti <br /> 1-. <br /> s s <br /> - •�1I1. <br /> 3 <br /> AMP <br /> 1 1 <br /> 3 <br /> • <br /> ■ ,L_ J _ • <br /> Loss of _ <br /> w. !1 <br /> bond between <br /> pavement layers 1 - <br /> -r <br /> allows traffic de IMq - <br /> to break loose _ • •.•1��: ';�- � �` <br /> • _ yE• m i S <br /> pieces of surface. <br /> IF <br /> I: <br />