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June 16, 2022 <br />64 <br /> <br />2. The grade within the diameter of a turnaround at the terminus of a permanent cul-de-sac <br />shall be as specified in Table 7. Street Grade and Intersection Standards. <br />(h) Horizontal Alignments. Horizontal street alignments shall be measured along the <br />centerline. Horizontal curves shall be used at all angle changes in excess of two (2) <br />degrees. Single, long radius curves shall be used rather than a series of curves with <br />varying radii and/or a series of short curves separated by short, straight segments. The <br />minimum horizontal curve radius for streets shall be one hundred fifty (150) feet. <br />1. Perimeter Streets. Plans with street locations along the perimeter of a property shall be <br />required to show building setback lines and clear sight triangles within the adjacent <br />properties. Permission shall be obtained from the adjacent landowner. <br />2. Roadway Alignment. The centerline of the street roadway shall correspond with the <br />centerline of the street right-of-way. <br />(i) Street Intersections. <br />1. Multiple intersections involving the junction of more than two streets are prohibited. <br />2. The distance between the centerline of streets intersecting at grade with a local street shall <br />be no less than one hundred fifty (150) feet measured along the centerline of the street <br />being intersected based on the safe stopping distance of a road with a design speed of <br />twenty-five (25) mph at a moderate grade. <br />3. The distance between the centerline of streets intersecting at grade with a collector street <br />shall be no less than three hundred (300) feet measured along the centerline of the street <br />being intersected based on the safe stopping distance of a road with a design speed of forty <br />(40) mph at a moderate grade. <br />4. The distance between the centerline of streets intersecting at grade with an arterial street <br />shall be no less than one thousand three hundred twenty (1320) feet measured along the <br />centerline of the street being intersected based on the safe stopping distance of a road with <br />a design speed of fifty-five (55) mph at a moderate grade. <br />5. Right angle intersections shall be used whenever possible. No street shall intersect another <br />at an angle of less than seventy-five (75) degrees. <br />6. The roadway edge at street intersections shall be rounded by a tangential arc with a <br />minimum radius as specified in Table 7. Street Grade and Intersection Standards. The right- <br />of-way radii at intersections shall be substantially concentric with the edge of the roadway. <br />7. Where appropriate, the Planning Commission may require additional traffic lanes to <br />facilitate vehicular turning movements at existing or proposed street intersections within or <br />bordering subdivision plans. <br />8. Clearly marked crosswalks shall be provided at all intersections when sidewalks or <br />pedestrian easements are provided in a development. Crosswalks may also be required by <br />the Planning Commission at other locations to promote the convenience and safety of <br />pedestrian traffic. The design of crosswalks and the materials used shall be consistent with <br />other crosswalks in the area. <br />(j) Sight Distance at Intersections. <br />1. Proper sight distance shall be provided at all new street and all new access drive <br />intersections in accordance with the latest edition of the American Association of State <br />Highway and Transportation Officers (AASHTO) A Policy on Geometric Design of Highways