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Rutting <br />Displacement of material, creating channels in wheelpaths. Caused by traffic compaction or displacement <br />of unstable material. Severe rutting (over two inches) may be caused by base or subgrade consolidation. <br />Repair minor rutting with overlays. Severe rutting requires milling the old surface or roadbed <br />reconstruction before resurfacing. <br />Page 40 <br />Slight to <br />moderate <br />Even slight rutting is <br />evident after a rain <br />Severe rutting <br />Here over <br />two inches <br />deep <br />