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a <br /> "If , because of adjacent land use , or the type or <br /> design of development, on-street parking is determined by <br /> the Director of Public Works to be unnecessary on one side <br /> of a street, the standard right-of-way width and roadway <br /> width may be reduced by six (6) feet. If the Director of <br /> Public Works determines no on-street parking is required on <br /> either side of the street, the above widths may be reduced by <br /> twelve (12) feet. <br /> " (c) Turnarounds . All turnarounds shall have a radius <br /> forty (40) <br /> of at least/-i- ty -(-50-) feet to face of curb. The minimum <br /> radius for turnarounds in commercial or industrial subdivisions <br /> may be recommended by the Director of Public Works to be <br /> anticipated traffic usage. <br /> increased because of /tpg phy o. pTe--ex3-9-ting -4eve-lepx t <br /> -±n -the v±e±ni-ty of- the -s-ubd is-i-on The maximum length of <br /> cul-de-sac street shall be two hundred fifty (250) feet , unless <br /> permitted by the Subdivision Committee or the Planning <br /> Commission , as the case may be, to be extended because of <br /> topography or pre-existing development in the vicinity of the <br /> subdivision. <br /> " (d) Grades, Curves , Sight Distances . Grades , curves <br /> and sight distances shall be subject to the approval of the <br /> Director of Public Works to ensure the safety of drivers and <br /> pedestrians , and to avoid excessive grading or vegetation <br /> removal. Maximum grade for all streets other than local <br /> or hillside streets shall be seven (7) percent, the maximum <br /> grade for local or hillside streets shall be twelve (12) <br /> percent. A grade of fifteen (15) percent may be permitted <br /> by the Director of Public Works if he determines that special <br /> topographical conditions or other exceptional circumstances <br /> (o <br />