(A) 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.
(B) Proposed streets shall be adjusted to the contour of the land so as to produce useable lots and streets of reasonable gradient.
(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) Alleys will not be approved in those parts of the plat proposed for single- and two-family residential use. Alleys may be provided for all lots or parcels intended for business, commercial, industrial and multiple-family residential use areas. The minimum width of an alley shall be 20 feet. No dead-end alleys shall be permitted.
(F) (1) Half-streets, except where it is absolutely essential to the reasonable development of the tract and in conformity to the principles herein stated, are prohibited. Whenever a half-street has previously been platted, abutting the tract boundary line, the remaining half shall be platted and improved within the tract.
(2) In cases where the platting of a half-street is approved, it shall not be constructed or used for access to any lot until such time as the adjoining half-street is platted and approved and the entire street is constructed.
(G) The following are the minimum acceptable widths of rights-of-way for the various classes of streets and highways:
County highways | 80 feet |
Road District township road | 60 feet |
Special traffic ways | |
Boulevard street | 100 feet |
Cul-de-sac streets | 60 feet, terminating in a turning circle, 20 feet in diameter; maximum length of any cul-de-sac shall be 600 feet measured from the centerline of the intersecting street to the center of the turning circle, except in the judgment of the Plat Committee the physical situation of the land being subdivided, requires a longer cul-de-sac |
Marginal access street (where permitted or required by the City Plat Committee) | 40 feet when abutting a freeway, expressway, area service, collector or land access highway |
“U” street (where permitted by the City Plat Committee) | 100 feet, terminating in a turning circle having a diameter of 100 feet |
Subdivision street | 60 feet |
(H) In those instances in which the owner or owners of a new subdivision own land on only one side of an existing street, the right-of-way of which is narrower than that required by these regulations, the subdivider shall dedicate additional right-of-way of sufficient width to make that portion of the right-of-way lying between the centerline of the existing right-of-way and the outside edge of the additional right-of-way at least equal to one-half of the required right-of-way width.
(I) All streets shall be named, and the names of streets in proposed plats shall be chosen as to avoid confusion or duplication with existing street names and shall be approved by the City Plat Committee.
(J) The centerlines of streets should intersect as nearly at right angles as possible.
(K) If the smaller angle of intersection of two streets is less than 75 degrees, the radius of the arc at the intersection of property lines shall be 30 feet or longer.
(L) Intersections or more than two streets at one point shall be avoided.
(M) Where parkways or special types of streets are involved, the City Road Commissioner 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 such streets.
(O) Horizontal visibility on curved streets and vertical visibility on all streets shall be maintained along the centerline as follows:
Arterial streets | 500 feet |
Feeder streets and parkways | 300 feet |
Local streets | 150 feet |
(P) Curvature measured along the centerline shall have a minimum radius as follows:
Arterial streets | 500 feet |
Feeder and parkways | 300 feet |
Local streets | 200 feet |
(Q) Between reversed curves on arterial streets there shall be a tangent of not less than 100 feet and on feeder such tangent shall be not less than 40 feet.
(R) Maximum grades for streets shall be as follows:
Arterial streets | Not greater than 6% |
Feeder and local streets and alleys | Not greater than 8% |
(S) The minimum grade of any street gutter or drainage scale should not be less than 0.3% where possible.
(Ord. passed - -)