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DRAFT COPY <br />DESIGN MEMORANDUM <br />TO: Jeanne Mabusth, Planning and Zoning Administrator <br />FROM: JCO/GRC <br />SUBJECT: DriveMay Standards, Sugar Hills <br />DATE: August 1, 1990 <br />OBJECTIVE: <br />Develope driveway standards for Sugar Hills that minimize both <br />intrusion into setback areas and amoi^nt o-f hard surface cover. <br />DESIGN CRITERIA: <br />Driveway width at property line - 16 -feet <br />Minimum setback from property line — 50 feet <br />Garage size - 3 Car/3 stall <br />Design vehicle - Passenger car (Group IV—Large <br />DISCUSSION: <br />Passenger car design data for this analysis was taken from the <br />“ArchitecLural Graphics Standards, 7th Edition" by Ramsey/Sleeper, pages <br />48 through 52. Copies of these pages have been included with this draft <br />for your information and review. Considering the type of development for <br />which these are being developed. Group IV — Large Cars was selected as the <br />design vehicle (see copy of page 48). <br />The width of the driveway at the face of the garage is somewhat <br />dependant on the garage and the type of door opening. There are three <br />options available for garage doors - 1) wide single door for all three <br />stalls; 2) a double door and a single door; and 3) three single doors. <br />The large single door for all three stalls is not considered practical <br />because of the large span for a header over the door and the difficulty of <br />operating such a large door strv.cture. We have chosen to consider options <br />2) and 3). Sketches of the three options for garage doors are enclosed <br />for your consideration. (See copy of page 50 for additional comments on <br />garages). <br />There is very little information available in the transportation <br />manuals regarding turning templates for passenger cars because they <br />generally do not govern the geometries of design for roadway facilities. <br />Therefore, we have developed our own turning templates for a large <br />passenger car (Group VI). This is shown on Figure No. Qne. <br />Figure No. One represents the minimum turning movements required fc*" a <br />car parked in front of a garage stall to back up, turn and drive forward <br />onto the street. The edges of the driveway are one foot wider than the <br />edge of the vehicle's path while making this maneuver. Please no the <br />wide swing of the right-front corner of the vehicle while backing.