Chapter 16.24
STREET AND HIGHWAY DESIGN
Sections:
16.24.020 Requirements – Modifications.
16.24.010 Conformance.
A. The street and highway design shall conform both in width and alignment to any master plan of streets and highways approved by the city council and right-of-way for any such street or highway indicated on the master plan shall be dedicated.
B. The street and highway design shall conform to any proceedings affecting the subdivision, which may have been initiated by other legally constituted bodies of the city, county or state. If a parcel of land to be subdivided includes a portion of the right-of-way to be acquired for a public freeway or parkway, and the city council shall determine the boundaries of the right-of-way to be acquired, the subdivider shall either dedicate or withhold from a subdivision all the area included in such right-of-way. (Ord. 72 § 12, 1973)
16.24.020 Requirements – Modifications.
The general design requirements of all streets and highways within the subdivision shall be as set forth hereinabove; except where topographical conditions, in the opinion of the director of public works, make necessary modifications of one or more of the below-listed requirements, the design as to such modification shall be in accordance with the designs of the director of public works of the city:
A. All streets shall, as far as practicable, be in alignment with existing adjacent streets by continuations of the centerlines thereof or by adjustments by curves and shall be in general conformity with the streets and highway master plan.
B. Streets shall be required to intersect one another at right angles as near to a right angle as practicable in each specific case.
C. Where necessary to give access to or permit a satisfactory future subdivision of adjoining land, streets shall extend to the boundary of the property and the resulting dead-end streets may be approved without a turnaround; provided, the control of access across such dead-end streets shall be vested in the city. In all other cases, a turnaround having a minimum radius of 50 feet shall be required.
D. Whenever a major street or state highway intersects any other street or highway, the property lines at each block corner shall be rounded with a curve having a radius corner of not less than 30 feet. All other street intersections, the property line at each block corner shall be rounded with a curve having a radius of not less than 20 feet. In either case, a greater curve radius may be required, if streets intersect other than at right angles.
E. The centerline curve radius on all streets and highways shall conform to accepted engineering standards of design and shall be subject to approval by the director of public works but shall be not less than 500 feet for major streets, 300 feet for secondary streets and 200 feet for minor streets.
F. No street or highway shall have a grade of more than 12 percent unless, because of topographical conditions or other exceptional conditions, the director of public works determines that a grade in excess of 12 percent is necessary. No grade shall be less than 30/100 percent.
G. Reserved strips controlling the access to public ways or minimizing values for special improvement assessments will not be approved unless such strips are necessary for the protection of the public welfare or of substantial property rights or both, and in no case, unless the control and disposal of the land comprising such strips is placed definitely within the jurisdiction of the city under conditions approved by the city council. (Ord. 72 § 13, 1973)
16.24.030 Width.
Streets and highways not shown on any master street and highway plans or not affected by proceedings initiated by the city council or approved by the city council upon initiation by other legally constituted governmental bodies shall not be of less width than those set forth in this section. Increased widths may be required where streets are to serve commercial property or where probable traffic conditions warrant such. Approval or determination of street or highway classification shall be made by the city council.
A. Thoroughfares: minimum right-of-way, 120 feet; minimum street surface width, 64 feet with a minimum division strip of 22 feet.
B. Major streets or highways: minimum right-of-way, 80 feet in commercial areas or possible future commercial area, and 76 feet in residential areas; minimum road surface width, 64 feet in commercial and residential areas.
C. Secondary and minor streets: minimum right-of-way, 55 feet. The city council may require up to 60 feet where a street may become a major street at some future date; minimum road surface width, 40 feet.
D. Loop streets when not over 1,000 feet in length: minimum right-of-way, 54 feet; minimum road surface width, 36 feet.
E. One-way streets: minimum right-of-way, 40 feet; minimum road surface width, 20 feet.
F. Two-level streets: right-of-way width, variable; minimum road surface width two 20-foot paved sections with sufficient room for proper slope in between.
G. Cul-de-sac streets and service roads when not over 300 feet in length: minimum right-of-way, 50 feet; minimum road surface width, 36 feet; minimum radius of cul-de-sac to be 50 feet.
H. Business and industrial streets: when not classified as a major street, minimum right-of-way, 66 feet; minimum road surface width, 44 feet.
I. Service roads: minimum right-of-way, 50 feet; minimum road surface width, 36 feet. (Ord. 72 § 14, 1973)