§ 153.080 STREETS AND ALLEYS.
   (A)   The developer of any subdivision designed to be used for residential, commercial or other purposes, shall lay out, grade and otherwise improve all streets that are designated on the approved plat or that directly serve the subdivision in accordance with the standards and specifications of these and other applicable regulations.
   (B)   Every lot within a subdivision shall have access to a public street. (Private streets, where permitted, must comply with the improvements required of comparable public streets.)
   (C)   Whenever a subdivision contains a major street that requires a street facility that is more costly than is required to serve the future occupants of the subdivision, the subdivider shall be required to pay only the portion of the cost of the major street that would equal the cost of an improvement required to serve only the subdivision, as determined by the City Council.
   (D)   Streets shall be designed, graded and improved to conform to the design and construction specifications and standard detail drawings contained in these subdivision regulations. Contracts for construction of new public streets shall contain, in whole or by reference, the provisions of these subdivision regulations pertaining to street improvements and recommendations from a geotechnical company on road base design. The material and compaction required for optimum stabilization of the subbase will depend on the soil type. Construction plans and specifications for all street improvements shall be approved by the City Council prior to final plat approval and filing.
   (E)   Intersections shall be designed with a flat grade wherever practical. In hilly or rolling areas, at the approach to an intersection, a leveling area shall be provided having not greater than a 2% rate at a distance of 60 feet, measured from the nearest right-of-way line of the intersecting street.
   (F)   Street corners on local residential streets shall have a minimum radius of 25 feet at the curb line or its equivalent.
   (G)   Street corners on commercial and industrial streets shall have a minimum radius of 40 feet at the curb line or its equivalent.
   (H)   Street intersections involving major streets shall have a minimum street corner radius of 40 feet at the curb line or its equivalent.
   (I)   Alleys serving commercial and industrial areas shall not be less than 30 feet in width.
   (J)   Alleys are not required for residential areas, but when provided, shall not be less than 20 feet in width.
Street Design Standards
Major Streets
Minor Streets
Design Element
Principal Arterial
Minor Arterial
Collector
Local
Street Design Standards
Major Streets
Minor Streets
Design Element
Principal Arterial
Minor Arterial
Collector
Local
Design speed
40 mph
30 mph
30 mph
25 mph
Grade:
Maximum
Minimum
5%
0.5%
7%
0.5%
10%
0.5%
10%
0.5%
Minimum right-of-way width
100 feet
80 feet
60 feet
50 feet
Minimum roadway width
32 feet
32 feet
32 feet
26 feet
Number of traffic lanes
2 (min.)
2
2
2
Stopping sight distance
350 feet
200 feet
200 feet
200 feet
 
(2002 Code, § 153.080) (Ord. 230, passed 9-8-1986; Ord. 415, passed 12-14-1998; Ord. 651, passed 10-26-2009)