Resolutions-1997-021

from the center of the bulb to the center of the adjoining street. Cul-de-sac shall not have an island in the middle of the bulb. I. Industrial Cul-de-sac bulbs shall be paved with a 59-foot wide radius. The outer edge of which shall be 16-feet inside the circumference of the right-of-way. The outer radius from the stem of the cul-de-sac to the head shall be a minimum of 75-feet. Cul-de-sacs shall have a maximum length of 400-feet from the center of the bulb to the center of the adjoining street. Cul-de-sac shall not have an island in the middle of the bulb. 5.06 SEPARATE TURNING LANES A. Separate turning lanes may be required on collector or arterial streets but will generally not be included in other street design. Where separate turning lanes are required on the basis of a capacity analysis, use a 12-foot pavement width. 5.07 MEDIANS AND BOULEVARDS A. Medians or boulevards on arterial streets shall have a minimum width of 16-feet. At intersections, medians may be used to provide for a separate left turn storage lane. B. Medians or boulevards which are included as a part of local or collector streets shall have a minimum width of 4-feet if paved or 9-feet if grassed. Paved medians on local and collector streets are discouraged, unless desired by city at intersections. 5.08 DESIGN SPEED A. A design speed will be used to design the geometric features for arterial streets. The design speed will not be less than 35 miles per hour; however, posted speed limits may be less. The design speed will be used to establish geometric features including sight distance, intersections, etc. to current AASHTO standards. 5.09 CLEAR ZONES A. On streets with curbs, the clear zone shall be 3-feet for streets with a posted speed limit of 25 mph or less and 10-feet for streets with a posted speed limit greater than 25 mph. On streets without curbs, the clear zone shall be 10-feet for two lanes and four lane facilities. B. Variances to clear zone requirements will be considered for overhead electrical facilities where compliance will significantly impact existing trees. In no case will a clear zone of less than 18-inches be allowed. A clear zone variance must be approved by the City Engineer. 5.10 STREET GRADES A. The maximum street grade for arterial, industrial and cul-de-sacs shall be 8%, for collector streets 10%, and for local street 10% unless otherwise approved by Engineer.