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shall be connected by a curve with a radius adequate to <br /> 411 ensure a sight distance within the Right-of-Wayright of way <br /> of not less than five hundred (500) feet for arterials, <br /> three hundred (300) feet for collectors, and one hundred <br /> (100) feet for all other streets. <br /> E. Turning Radius - Proper design should consider required <br /> turning radius of vehicles for access points or entrances to <br /> and from a highway using standards adopted by the Minnesota <br /> Department of Transportation. <br /> 3 . Allcys. <br /> F.P, Location Requirements - Except in the case of a <br /> shopping center, planned as a unit with off-street parking <br /> and loading space, either a public or private alley shall be <br /> provided in a block where commercially zoned property abuts <br /> a major thoroughfare or a major street . Alleys in <br /> residential areas will not be permitted except by resolution <br /> of the City Council . <br /> G.B. Widths - Alleys, where permitted by the City Council, <br /> shall be at least eighteen (18) feet wide in residential <br /> areas and at least twenty-four (24) feet wide in commercial <br /> areas. <br /> i.� Grades - All centerline street gradients in allcyc <br /> shall be at least five-tenths percent (0 .5%) and shall not <br /> exceed cight perccnt (8%) . the following: arterials and <br /> collector streets - 5% to 8%, minor streets - 8%. <br /> I . Minor Streets - Minor streets shall be designed to <br /> discourage use by through traffic. <br /> J. Cul-de-sacs - Cul-de-Sac streets, permanently designed <br /> as such, can be undesirable in terms of traffic movement, <br /> emergency vehicle access, school bus traffic and snowplowing. <br /> The City reserves the right to restrict the number and length <br /> of cul-de-sacs in a subdivision. The maximum length of a <br /> street terminating in a Cul-de-Sac shall be seven hundred <br /> (700) feet, measured from the center line of the street of <br /> origin to the center of the Cul-de-Sac. Longer cul-de-sacs <br /> shall not be allowed, except where the City Council <br /> determines that : <br /> i . the Cul-de-Sac is temporary because the street is <br /> designed to extend into adjoining unsubdivided <br /> 411 property and connect with a future street; or <br /> 10.3426 <br />