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<br />5-502 V. Horizontal Clearance <br />On a road with an ADT volume of 1,000 or more and with ~ <br />a design speed of 50 mph or greater, a clear roadside <br />recovery area at least 10-to-20-feet outside the <br />shoulder shall be provided. Where the design speed <br />exceeds 25 mph, or ADT is less than 1,000, a clear <br />roadside recovery area at least eight-to-12 feet from <br />the edge of the through traffic lane .shall be provided. <br />The clear roadside area shall be appr~~priately flat and <br />rounded in cross-section design, exce;~t: <br />I. in cut sections where fixed obje~;ts are located <br />sufficiently up the cut slope su~~h that little <br />likelihood exists that they could be struck; and <br />IZ. where guardrail protection is pr~~vided. <br />The recovery area shall be clear of ol~jects such as un- <br />yielding trees, un-yielding sign supports, utility <br />poles, un-yielding light poles and a1:L other fixed <br />objects that might severely damage an out-of-control <br />vehicle. To the extent feasible, where another highway <br />or railroad passes over, the structurca shall be <br />designed so that the pier or abutment supports have <br />lateral clearance as great as the clezir roadside area <br />on the approach road. Where it is not: feasible to <br />carry the approach roadway across an overpass or other <br />bridge, an appropriately transitioned guardrail shall <br />be provided and securely anchored to t:he bridge rail. <br />At hazardous locations, such as the outside of a sharp <br />curve on low fill, where guardrail is not provided, a <br />much greater horizontal clearance shall be provided, as <br />approved by the County Engineer. Minimum horizontal <br />clearance to manmade objects, such as fences and power <br />poles, shall be 20 feet from centerline. <br />5-502 W. Intersection Design <br />Intersection design shall avoid steep-•profile grades <br />and ensure adequate approach sight dis~,tance. <br />Intersections shall not be located on short crest <br />vertical curves, just beyond short crest vertical <br />curves, or on sharp horizontal curves. Where no <br />practical alternative to such locations exists, cut <br />slopes shall be flattened and horizontal and/or <br />vertical curves lengthened to provide additional sight <br />distance. Sufficient sight distance shall permit a <br />passenger vehicle on the minor leg of an intersection <br />to cross the traveled way without requiring approaching <br />through traffic to slow down. A minimum of six seconds <br />shall be available to the driver crossing the through <br />Page 5-5-14 <br />