(A) Street widths. All right-of-way and pavement widths (face to face of curb) shall conform to the following minimum dimensions:
Classification | Street Right-of-Way | Width |
Arterials | As determined by City Council or state requirements where applicable, but in no case shall the minimum right-of-way be less than 66 ft. | |
Collector streets | 66 ft. | 40 ft. |
Local streets and cul-de-sacs | 60 ft. | 36 ft. |
Marginal access street | 50 ft. | Variable |
Minor arterials | 66 ft. minimum | 42 ft. |
(B) Street deflections. When connecting street lines deflect from each other at any one point by more than ten degrees, they shall be connected by a curve with a radius of not less than 100 feet.
(C) Street grades. All centerline gradients shall be at least 0.5% and shall not exceed the following without approval of the City Engineer:
Classification | Maximum Gradient (Percent)* |
Arterials and collector streets | 4 |
Local streets and marginal access streets | 6 |
NOTE TO TABLE: * To assure a safe and reasonable sight distance at intersections, a lesser maximum grade may be required. | |
(D) Street jogs. Street jogs shall have a centerline off-set of 150 feet or more when applied to minor streets, cul-de-sacs or marginal access streets. In all other cases they shall be avoided.
(E) Cul-de-sacs. Maximum length of cul-de-sac streets shall be 500 feet measured along the centerline from the intersection of origin to end of right-of-way, and minimum diameter of turn around shall be 120 feet. Lot lines abutting cul-de-sac turn-arounds shall be radial except in extreme cases where special permission may be granted otherwise.
(F) Marginal access streets. Where a subdivision abuts or contains an existing or planned major arterial or a railroad right-of-way, the Council may require a street approximately parallel to and on each side of such right-of-way for adequate protection or residential properties and to afford separation of through and local traffic. Such marginal access streets shall be located at a distance from the major thoroughfare or railroad right-of-way suitable for the appropriate use of the intervening land, as for park purposes in residential districts. Such distances shall also be determined with due regard for the requirements of approach grades and future grade separations.
(G) Half streets. Half streets shall be prohibited, except where essential to the reasonable development of the subdivision in conformity with the other requirements of these regulations; and except where the Council finds it will be practicable to require the dedication of the other half when the adjoining property is subdivided. Wherever there is a half street adjacent to a tract to be subdivided, the other half of the street shall be platted within such tract.
(H) Street surfaces. All streets shall be surfaced as required by the City Engineering Department before acceptance into the system of street maintenance. Unless permitted by the City Engineer, no street shall have bituminous surface unless curb and gutter is constructed.
(I) Reserve strips, street access. Reserve strips controlling access to streets shall be prohibited unless approved by the City Engineer.
(J) Private streets. Private streets shall not be approved nor shall public improvements be approved for any private streets, unless approved as part of a planned unit development.
(K) Hardship to owners of adjoining property avoided on streets. The street arrangements shall not be such as to cause hardship to owners of adjoining property in platting their own land and providing convenient access to it.
(L) Alleys, minimum standards.
(1) Locational requirements, alleys. The city may require that either a public or private alley shall be provided in a block where commercially zoned property abuts an arterial street. Alleys in residential areas other than those zoned for multiple-family use shall not be permitted.
(2) Alley widths. All alley rights-of-way and pavement widths shall conform to the following minimum standards.
Classification | Right-of-Way | Pavement |
Industrial or commercial | 24 ft. | 20 ft. |
Residential (two-way) | 20 ft. | 16 ft. |
(3) Alley grades. All centerline gradients shall be at least 0.5% and shall not exceed 8% unless approved by the City Engineer.
(4) Alley surface. All alleys shall be surfaced as required by the City Engineer before acceptance into the system of street maintenance.
(M) Intersections, requirements.
(1) Angle of intersections. Street intersections shall be as nearly at right angles as possible and shall not be less than 75 degrees unless approved with good reason by the City Engineer.
(2) Size of intersection. Intersections of more than four corners shall be prohibited.
(N) Corner radii. Roadways of street intersections at the curb shall be rounded by a radius of not less than 20 feet. Roadways of alley-street intersections shall be rounded by a radius of not less than ten feet. Corners at the entrance to the turn-around portions of cul-de-sacs shall be rounded by a radius of not less than 15 feet.
(1992 Code, § 315:18) (Ord. 1069, passed 3-2-1993)