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-explain purpose of crown
and why a smooth surface is important
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-crown is when the middle portion of the road is
higher than the sides
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-crown first defenses in preventing water from
running down a roadway, sends water down off the sides
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smooth surface and crown that rises 1/2 inch for each
foot of road width is acceptable, forces water quickly off the road.
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explain what a berm is and
why it needs to be removed
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-berms are the ridges at the edge of the road, formed
when material is pushed to the side
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-prevent lateral runoff and should be removed
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