Chapter 3: Local Road Planning 77 Table 3.5 Typical Pavement Distress of Asphalt Concrete Pavements (ACP) Distress Type Major Causes Common Repair Method A.1. Rutting Consolidation and lateral Overlay, mill and resur- movement of AC, base, facing overload (Corrugation and Remove and reconstruct shoving) Lack of AC stability (too or patching plane surface much asphalt, too much and overlay fines, round aggregates, lack of aeration) A.2. Edge Break Insufficient compaction, loss Patching of lateral support, aging A.3. Potholes Weakness in pavement Remove, replace and (little asphalt, spot thickness patching defects, less fine or excess fines, poor drainage) A.4. Surface Aging, weather, improper Overlay (after spot failure Failures application of tack coat repair), Patching (Deterioration, between PCC and AC delamination, overlay, construction on wet edge break) PCC A.5. Wearing Insufficient compaction, Seal coat, Thin over- Failures construction during wet lay (Raveling, season, dirty aggregate, flushing, asphalt overheating, polishing) insufficient asphalt