2000-12-06(II) - Laserfiche WebLink

Home Browse Search

266 Finally, if there are questions that VDOT has about Council's position as stated in this letter, please let us know, through contact with City staff or with me. We stand ready to cooperate with VDOT in moving this project from the proverbial drawing board to construction. Sincerely yours, J. Blake Caravati Mayor CC.' Donald R. Askew, District Administrator, Culpeper Carter Myers Board of Supervisors EXHIBIT A Adjustments necessary to bring VDOT drawings into compliance with City Council=s Directive to design according to the principles outlined in A Study of Roadway Alternatives for the Meadow Creek Parkway in Mclntire Park, prepared by Rieley & Associates for the City of Charlottesville, April 27, 1999: Horizontal Alignment: The horizontal alignment should closely match that shown for Alternative 2-U in the Study of Roadway Alternatives. The points of intersection, delta angles, radii, spiral lengths, and stationing are all shown in the report. In particular, a sequence of radial curves, joined to tangents with spirals on each end, is an important aspect of the horizontal alignment. The current alignment shows only circular curve alignment, with reverse curves in two locations. This is not consistent with the approach discussed in the Roadway Alternatives report. The horizontal alignment is to follow the path shown, which is for the best fit of a two-lane roadway, rather than two lanes of an anticipated four-lane roadway. Geometry should be shown as the centerline for a two-lane road, not the centerline for a four-lane road with two-lanes off-set to one side from the center-line. Vertical Profile: The vertical profile should closely match that shown for Alternatives 2-U, 3-U, 4-U in the same report. Lengths of vertical curves, gradients, and K values are listed in the report. Coordination of Horizontal Alignment with Profile: It is important that the horizontal and vertical components be coordinated and designed to result in a three-dimensional alignment that is Ain phase.~ The profile in the Study of Roadway Alternatives demonstrates this relationship by showing the lengths of the horizontal curves on the vertical profile. This principle is discussed on page three and shown on Figure A of the report. Superelevation: Superelevation should closely match that shown in the report. Pavement Widening: The roadway should be designed with 20-£oot 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.