(A) Proposed streets should be adjusted to the contour of the land so as to produce usable lots and streets of reasonable gradient.
(B) The street and alley layout shall conform to the thoroughfare plan for the development of the neighborhood in which the proposed subdivision is located and shall provide access to all lots and parcels of land within the subdivision. Where streets cross other streets, jogs shall not be created. The minimum distance between center lines of parallel or approximately parallel streets intersecting a cross street should be 120 feet.
(C) 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.
(D) 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.
(E) Widths of streets shall conform to the widths specified according to type of use in the thoroughfare plan, the minimum right-of-way of residential streets being 60 feet.
(F) The minimum right-of-way of marginal access streets or cul-de-sacs, shall be 60 feet. All cul-de- sacs 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.
(G) 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.
(H) The center lines of streets should intersect as nearly at right angles as possible.
(I) At intersections of streets and alleys, property line corners shall be rounded by arcs of at least 20 feet radii or by chords of such arcs.
(J) At intersections of streets the property line corners shall be rounded by arcs with radii of not less than 15 feet, or by chords of such arcs.
(K) If the smaller angle of intersection of two streets is less than 60 degrees, the radius of the arc at the intersection of property lines shall be increased as deemed advisable by the City Plan Commission.
(L) Intersections of more than two streets at one point shall be avoided.
(M) Where parkways or special types of streets are involved, the Commission may apply special standards to be followed in their design.
(N) Whenever the proposed subdivision contains or is adjacent to a railroad right-of-way or a highway designated as a "limited access highway" by the appropriate highway authorities, provision shall be made for a marginal access street, or a parallel street at a distance acceptable for the appropriate use of the land between the highway or railroad and those streets.
(O) Unobstructed sight distances measured from a point five feet above the proposed grade line, to permit horizontal visibility on all streets, must be established along the center line of the streets as follows.
(1) Arterial streets: 500 feet.
(2) Feeder streets, residential streets, and parkways: 300 feet.
(P) Curvature measured along the center line shall have a minimum radius as follows.
(1) Arterial streets: 500 feet.
(2) Feeder streets and parkways: 300 feet.
(3) Residential streets: 150 feet.
(Q) Between reversed curves on arterial streets there shall be a tangent of not less than 100 feet and on feeder and residential streets and parkways the tangent shall be not less than 40 feet.
(R) Maximum grades for streets shall be as follows:
(1) Arterial streets and parkways, not greater than 6%.
(2) Feeder and residential streets and alleys, not greater than 10%.
(S) The minimum grade of any street gutter shall not be less than 0.3%.
(Ord. CO-67-5, passed 2-21-67) Penalty, see § 10.99