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Y., <br /> I .. n <br /> "..; <br /> STANDARDS FOR PFTVATB ROADS <br /> Travelway <br /> The travelway must be surfaced and compacted with a material acceptable <br /> to Orange County to the required width of the particular class of road. A <br /> crown should belbuilt into the travelway so that water will drain from the road <br /> surface iato the side ditch. The crown should not be so great as to cause vehicle <br /> to slide off the travelway when ice or snow are on the road. <br /> Generally the road should be crowned as shown in the specifications sheet <br /> so that runoff will drain to the ditches on both sides of the road. However,rin <br /> some situationslit may be desirable not to crown the road but to have the <br /> travelway sloped to a single ditch as shown below. This is applicable in two <br /> situations: where it is necessary to cut down on the length of a ditch in order <br /> to reduce the erosion potential by decreasing the volume of runoff, or where <br /> it it difficultlto construct ditches due to rock or in curves. <br /> PITCH OF TRAVELWAY <br /> Surface Materials <br /> Acceptable material for surfacing the travelway is Aggregate Base Course <br /> (commonly called "crusher run"). Soil type base materials (commonly called <br /> "Chapel Hill Gravel" or"Chapel Hill Grit") will be accepted under the following <br /> conditions: <br /> The material originates from a quarry approved by the North Carolina <br /> Department of Transportation. <br /> The grade of the road is less than 8%. - <br /> where the grade is greater than 8% a layer of crusher run stone will <br /> be placed over the Chapel Hill Gravel before compaction. <br /> Sources of surface material, shall be verified with the Orange County <br /> planning Department before use. <br /> Fill Material - <br /> Where filling is necessary to raise the roadbed. ernee <br />