Open base shoulders

should be lightly bladed periodically to maintain a uniform slope sufficient to properly drain the roadway surface. Serious and habitual rutting in critical areas should be corrected by the addition of suitable material as soon as practical. Excessive material losses should be corrected by adding additional material as soon as practical.

Paved shoulders

are subject to the same distresses and deterioration as similar roadway surfaces and should be maintained in the same manner.

Sod shoulders

should be lightly bladed as needed in order to prevent shoulder buildup and drop-off and to provide a uniform slope sufficient to properly drain the roadway surface. Serious and habitual rutting in critical areas should be corrected by the addition of suitable material as soon as practical.