§ 153.075  STREETS.
   (A)   Where a subdivision abuts an existing county road, additional right-of-way along the county road will be deeded to the county to establish rights-of-way as follows:
      (1)   Arterial road:  100 feet right-of-way;
      (2)   Primary road:  80 feet right-of-way; and
      (3)   All other roads:  60 feet right-of-way.
   (B)   Definitions and locations of streets shall conform to the county Thoroughfare Plan, as shown in Appendix D.
   (C)   If the subdivision is judged to create additional traffic and change the existing road classification, the new classification will govern the amount of right-of-way required.
   (D)   The street and alley layout shall provide access to all lots and parcels of land within the subdivision, and where streets cross other streets, jogs shall not be created.
   (E)   Proposed streets shall be adjusted to the contour of the land so as to produce usable lots and streets of reasonable gradient.
   (F)   Certain proposed streets, where appropriate, shall be extended to the boundary line of the tract to be subdivided so as to provide for normal circulation of traffic within the vicinity.
   (G)   Wherever there exists a dedicated or platted portion of a street or alley adjacent to the proposed subdivision, the remainder of the street or alley to the prescribed width shall be platted within the proposed subdivision.
   (H)   Widths of primary, secondary, and feeder streets shall conform to the width specified in the Thoroughfare Plan (see Appendix D).
   (I)   The minimum right-of-way of residential streets, marginal access streets, or culs-de-sac shall be 50 feet.  All culs-de-sac shall terminate in a circular right-of-way with a minimum diameter of 100 feet, or other arrangement for the turning of all vehicles conveniently within the right-of-way.
   (J)   Alleys shall be discouraged in residential districts but should be included in commercial and industrial areas where needed for loading and unloading or access purposes, and where platted shall be at least 20 feet in width.
   (K)   The center lines of streets should intersect as nearly at right angles as possible; in no instance shall an acute angle of less than 70 degrees be accepted.
   (L)   At intersections of streets and alleys, property line corners shall be rounded by arcs of at least 20 feet radii or by chords of arcs thus curved.
   (M)   At intersections of streets, the property line corners shall be rounded by arcs with radii of not less than 25 feet or by chords of arcs thus curved.
   (N)   If the smaller angle of intersection of two streets is less than 90 degrees, the radius of the arc at the intersection of property lines shall be increased as deemed advisable by the Commission.
   (O)   Intersections of more than two streets at one point shall be avoided.
      (1)   Minor street center lines shall be separated by 150 feet.
      (2)   Major street center lines shall be separated by 500 feet.
   (P)   Where parkways or special types of streets are involved, the Commission may apply special standards to be followed in their design.
   (Q)   Whenever the proposed subdivision contains or is adjacent to a railroad right-of-way, or a street or a highway designated as a limited access street or highway by the appropriate authorities, provision shall be made for a service road at a distance acceptable for the appropriate use of the land between the highway or railroad and such streets.
   (R)   Horizontal visibility on curved streets and vertical visibility on all streets must be maintained along the center lines as follows:
      (1)   Primary and secondary streets:  600 feet;
      (2)   Feeder streets and parkways:  300 feet; and
      (3)   Residential streets:  300 feet.
   (S)   Curvature measured along the center line shall have a minimum radius as follows:
      (1)   Primary and secondary streets:  800 feet;
      (2)   Feeder parkways:  300 feet; and
      (3)   Residential streets:  200 feet.
   (T)   Between reversed curves on primary and secondary streets there shall be a tangent of not less than 100 feet, and on feeder and residential streets the tangent shall be not less than 50 feet.
   (U)   Maximum grades for streets shall be as follows:
      (1)   Primary and secondary streets:  no greater than 6%; and
      (2)   Feeder and residential streets and alleys:  not greater than 8%.
   (V)   The minimum grade of any street gutter shall not be less than three-tenths percent.
(`88 Code, § 8-110)  (Ord. 98-20, passed 11-10-98)