Agenda - Council - 03/23/2010 - Laserfiche WebLink

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Attachment A (3) Street grades shall not exceed seven percent for minor and collector streets and four percent for thoroughfares, and in no case shall they be less than 0.4 percent. Wherever feasible, grades within 30 feet of street intersections shall not exceed three percent and all private driveways providing access to public right -of -way shall approach to grade level. (4) Different connecting street gradients shall be connected with vertical curves. Minimum length, in feet, of said vertical curves shall be 100 feet or 20 times the algebraic difference in the percentage of grade of the two adjacent gradients. (5) Street jogs in minor and service streets shall have a centerline offset of not less than 150 feet. Street jogs in collector streets shall have a centerline offset of not less than 300 feet. (6) Minor streets shall be so aligned that their use by through traffic will be discouraged. (7) The maximum length of cul -de -sac streets shall be 600 feet, measured along the centerline from the intersection of origin to the end of the right -of -way. Each cul -de -sac shall have a terminus of nearly circular shape with a minimum right -of -way diameter of 130 feet and a minimum roadway diameter of 100 feet. (g) In those instances where a subdivision abuts or contains an existing or planned thoroughfare or a railroad right -of -way, the planning commission may require a service street approximately parallel to and on each side of such right -of -way. (9) Half streets shall be prohibited except where essential to the reasonable development of the subdivision in conformity with the requirements of this chapter. (10) Private streets shall be permitted in accordance with applicable zoning district. (11) Street rights -of -way shall not be planned so as to cause hardship to owners of adjoining property. (12) The angle formed by the intersection of streets shall not be less than 75 degrees, with 90- degree intersections preferred as measured 100 feet from the intersection. Intersections of more than four corners are prohibited. (13) A tangent of at least 100 feet in length shall be introduced between reverse curves on thoroughfare and collector streets and a tangent of at least 50 feet in length shall be introduced between reverse curves on all other streets, unless otherwise approved by the city engineer. (14) Roadways of street intersections shall be rounded by a radius of not less than 20 feet for suburban type streets and 30 feet for rural type streets. Roadways of alley - street intersections shall be rounded by a radius of not less than ten feet. (d) Public utilities. (1)