An extruded bituminous concrete curb of Class 3 rests atop a layer of bituminous pavement with an intermediate tack coat. The curb stands six inches in height with a nine-inch overall base width, featuring a two-inch radius at the top, a forty-eight degree front slope, and a twenty-one degree back slope. Finish grade lawn abuts the rear of the curb at the top edge. Dimensions specify a three-inch clear distance from the back of the curb to the finish grade transition.
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