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,-I -- %a <br />6 <br />41 <br />into the side ditch. The crown should not be so great as to <br />cause vehicles to slide off the travelway when ice or snow <br />[are] is on the road. <br />Generally the road and shoulder should be crowned as <br />shown in the specifications sheet so that runoff will drain <br />to the ditches on both sides of the road. However, in some <br />situations it may be desirable not to crown the road but to <br />have the travelway sloped to a single ditch as shown below. <br />This is applicable in [two] ree situations: LU where it is <br />necessary to cut down on the length of a ditch in order to <br />reduce the erosion potential by decreasing the volume of <br />runoff, [or] u where it is difficult to construct ditches <br />due to rock, or (3 )_to grovide for su erelevation [or] in <br />curves. Such a single slo a should always drain toward the <br />inside of a curve. The crown slo a of the roagA and shoulder <br />should be aRgroximately 112 to 1 inch 2er foot. <br />(The proposed amendment proposes additional design standards <br />for situations where it is not desirable to crown a road). <br />PrrM4 CYr T RA VELWAY <br />surface Materials <br />Private roads mgy be Ravedc grQvided that avement desi n <br />materials and thie mess meets NCDOT subdivision street <br />standards. <br />(The proposed amendment specifies that paving for private <br />roads must meet NCDOT standards). <br />Acceptable material for surfacing the travelway is Soil <br />Aggregate Base Course (commonly called "crusher run "). <br />type base materials (commonly called "Chapel Hill Gravel" or <br />"Chapel Hill Grit ") will be accepted under the following <br />conditions: <br />The material originates from a quarry approved by <br />the North Carolina Department of Transportation. <br />H = delete text <br />bold underline = add text <br />