§ 151.073 STREETS, SIDEWALKS, AND/OR TRAILS.
   The City Council shall not approve any plat unless all streets shown thereon shall be of sufficient width and shall be so located as to accommodate the probable volume of traffic thereon, afford adequate light and air, facilitate fire protection, provide access of firefighting equipment to buildings, provide ease of maintenance, and provide a coordinated system of streets conforming to the city street plan.
   (A)   Access upon a state or federal highway shall meet state and federal access requirements.
   (B)   Local streets shall be so planned as to continue and promote the grid pattern of development previously established in the city.
   (C)   Wherever there exists a dedicated or platted portion of a street or alley along a boundary of the tract being subdivided, the remainder of said street or alley, to the prescribed width, shall be platted within the proposed subdivision.
   (D)   Half streets shall not be provided, except where it is essential to the reasonable development of the subdivision in conformity with the other requirements of these regulations, or where it becomes necessary to acquire the remaining half by condemnation so it may be approved in the public interest.
   (E)   Dead-end streets shall be prohibited unless provided with a turnaround or cul-de-sac arrangement.
   (F)   Cul-de-sacs shall normally not be longer than 600 feet including a turnaround which shall be provided at the closed end with an outside curb radius of not less than 50 feet. The maximum grade of the turnaround portion of the cul-de-sac shall be 5%.
   (G)   Alleys may not be provided in residential districts but shall be included in commercial and industrial areas where needed for loading and unloading or access purposes.
   (H)   The minimum distance between centerlines of parallel or approximately parallel streets intersecting a cross street from opposite directions shall be 125 feet.
   (I)   Intersections of more than two streets at one point shall be avoided.
   (J)   Right-of-way requirements may be increased for specific thoroughfares if existing or anticipated traffic flow warrants it, or if drainage casements parallel such thoroughfares. Such increased width will be set by the City Council under the advisement of the Planning Commission and the City Engineer.
   (K)   Minimum right-of-way widths, paving widths, angle of intersections, curb radius, distances along sides of sight triangles, horizontal alignments, vertical alignments, as well as maximum grades shall be in accordance with the following table.
Regional Streets
Collector Streets
Local Streets
Cul-de Sacs
Frontage Road
Alleys
Regional Streets
Collector Streets
Local Streets
Cul-de Sacs
Frontage Road
Alleys
Grades for 25 feet before intersection
3%
3%
3%
3%
3%
3%
Horizontal alignment (minimum radii of centerline)
600 feet
400 feet
200 feet
100 feet
600 feet
100 feet
Maximum grade
8%
12%
12%
12%
12%
12%
Minimum angle for intersection
90 degrees
80 degrees
70 degrees
70 degrees
90 degrees
70 degrees
Minimum curb radius
35 feet
25 feet
15 feet
15 feet
35 feet
5 feet
Paving width
52 feet
44 feet
36 feet
32 feet
30 feet
20 feet
Right-of-way width
100 feet
70 feet
60 feet
50 feet
45 feet
33 feet
Vertical curves (minimum sight distance)
500 feet
350 feet
200 feet
100 feet
500 feet
100 feet
 
   (L)   Sidewalk/trail minimum standards shall be as follows.
 
Class of Street
Sidewalk Width (feet)
Trail Width ROW/Paved
Arterial
5
20/8
Collector
5
15/8
Local/minor
5
15/8
 
(Prior Code, § 535.040)