2000_Resolutions - Laserfiche WebLink

Home Browse Search

Pavement Widening: • The roadway should be designed with 20 -foot standard pavement width (or its metric equivalent), with widening of pavement on curves, in accordance with AASHTO and VDOT widening criteria. The widening should be applied gradually through the length of the spiral curves, and remain full width through the circular curve component of the curve. Roadside Grading: Roadside grading should be accomplished through a grading plan, and not standard cross- sections. All cross-sections should be rounded at the edges of shoulders and at the tops and bottoms of all side slopes. The slopes themselves should only be as steep as two -to -one when necessary. Where there is room, the grades should be eased to three -to -one and four -to -one, and flatten gradually. The Study of Roadway Alternatives contains a drawing from an AASHTO document illustrating this concept. (Figure D.) Drainage: Roadside drainage should be handled in a way that minimizes its visual impact on the park and the parkway. Grass swales are preferred over paved ditches, and even grass swales should be as minimal and as subtle as possible. Ditches and swales running generally parallel to the contours on side slopes should be avoided. Rip -rap is altogether inappropriate in this setting. Pipes should not "daylight" in the area between the roadway and Schenk's Branch. All inlet and outlet • structures should be designed to be appropriate in a park setting. Since most drainage elements did not show on this version of the plan, there was not much to react to; but this is a critical element for the success of the design. Pond: The pond is to conform in size and shape to that shown in the McIntire Park Master Plan and the Study of Roadway Alternatives as closely as possible. A safety bench shall be included in the design two feet below normal water elevation and shall extend to ten feet into the pond on all sides. Intersection: The intersection is to be designed with a total of seventeen lanes entering or leaving the intersection. No change is desired to the existing McIntire Road configuration. The retaining wall and addition of lanes south of US 250 Bypass should be removed from the plan. The single left-hand turning movement from Route 250 (going west) into McIntire Road is to be retained in Page 7 of 8 0