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