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166.28  STREETS.
   1.   Streets Must Conform with General Plan.  The arrangement, character, extent, width, grade and location of all streets shall conform to the General Plan of the City and to any plans which may be adopted by the Planning Commission or the Council.
   2.   Continuation of Existing Streets.  New streets shall normally continue as an extension of existing streets unless good planning indicates a different solution.  Street patterns shall take into consideration access needed to develop adjoining properties and shall conform to topography so as to provide the best building sites.  Sketches of a proposed street system for adjoining property may be required if it is owned or under the control of the subdivider.  Street names shall take the name of existing streets on the same general alignment.  New street names shall be approved by the Planning Commission and not be so similar to existing names as to cause confusion.
   3.   Traffic Circulation.  When possible, local or residential streets shall be planned so as to discourage through traffic and to conveniently channel traffic onto the collector and arterial streets.
   4.   Dead-End Streets Prohibited.  Dead-end streets are prohibited, except that where the General Plan indicates a street is to continue past the subdivider’s property, a temporary dead end may be allowed until such time as the street is continued.
   5.   Culs-de-Sac.  Culs-de-sac will be permitted where topography and other conditions justify their use.  They may be up to 600 feet in length, as approved by the Planning Commission and Council.  If necessary, a landscape plan shall be submitted for cul-de-sac islands, the maintenance of which shall be the responsibility of the adjacent owners.
   6.   Half Streets.  Half streets are prohibited.
   7.   Angle of Intersection.  Streets shall be laid out so as to intersect as nearly as possible at right angles, except where topography and other conditions justify variations.  The minimum angle of intersection of streets shall be 75 degrees.
   8.   Street Jogs.  Street jogs with centerline off-sets of less than 150 feet shall be avoided.
   9.   Granular Paving Adjacent to Subdivision.
      A.   A developer may be required to extend or expand existing off-site public infrastructure as necessary to fully improve a proposed subdivision, or the City Council may, at its sole discretion, require a proposed subdivision to be delayed until such extension or expansion can be funded and construction by the city or other governmental entity.
      B.   Costs, Responsibilities.  Developers may be fully responsible for the entire costs of improving all collector and local streets within a subdivision, and for the costs of paving a width of not less than 15.5 feet of roadway along all street frontages by providing a 10-year cash escrow to be held in a city account or by posting surety therefore, and turn lanes that serve or will serve the subdivision whether located within the subdivision or on a street.
   10.   Street Grades.  Street grades shall conform with the overall drainage pattern of the locality of the subdivision and shall fall within the minima and maxima as follows:  arterial street – six percent; local or residential and collector streets – 10 percent.  No street grade shall be less than one-half of one percent.
   11.   Vertical Sight Distances.  Change of grade shall conform to current standards of the City for the type of street in question, provided that in no case shall there be constructed a sight distance of less than 100 feet, measured four feet above pavement surface at the ends of the tangent.
   12.   Horizontal Sight Distances.  A tangent at least 100 feet long shall be introduced between reverse horizontal curves on collector and arterial streets.  When connecting street lines deflect from each other at any one point by more than 10 degrees, they shall be connected by a curve with a radius adequate to insure a sight distance of not less than 100 feet for collector streets and of such greater radii as the Planning Commission shall determine for arterial streets and in other special cases.
   13.   Pedestrian Ways.  Pedestrian ways may be required by the Planning Commission so as to allow cross access for pedestrians in very long blocks.  In general, blocks of 800 feet or more in length should have a pedestrian way near the center of the block.
   14.   Standard Right-of-Way Widths.  For all streets, alleys and other thoroughfares hereafter dedicated and accepted, the minimum right-of-way widths shall not be less than the minimum dimensions for each classification of public way as follows:
      A.   Arterial Streets – 70 feet or as set forth in the General Plan or other plan adopted by the Planning Commission or the Council.
      B.   Collector Streets – 60 feet.
      C.   Local or Residential Streets – 60 feet.
      D.   Culs-de-sac – 60 feet with a 130 feet diameter turn-around at the closed end.  Culs-de-sac are subject to approval by City on project-by-project basis; provide areas designated for snow removal storage from cul-de-sac.
      E.   Alleys – 20 feet.
      F.   Pedestrian Ways – 10 feet.
For details of grades and pavement widths, see provisions under the heading of Improvements.  Reserve strips controlling access to streets shall be allowed under conditions adequate to protect future public interests.