(a) Arrangement. The arrangement, character, extent, width and location of all streets shall conform to the locally adopted Land Use and Thoroughfare Plan. The design of proposed streets shall provide for both the continuation of existing streets and access to adjacent unplatted lands so that the entire area can be served with a coordinated street system.
(b) Street Classifications.
(1) Major arterial thoroughfares shall be planned for continuation of movement of fast traffic between points of heavy traffic generation and from one section of the community to another. They shall contain as few intersections with minor streets as possible. Such thoroughfares should traverse the community and should be spaced approximately one mile apart, unless otherwise approved by the Planning Commission.
(2) Collector streets shall provide a traffic route from local streets to major arterial thoroughfares. Collector streets normally contain a relatively large number of intersections with local streets and few intersections with major arterial thoroughfares. These streets should be spaced at least one-fourth mile apart, unless otherwise approved by the Planning Commission.
(3) Minor streets shall provide direct and full access to each lot and safe and efficient circulation through all multifamily development and shall be laid out so that their use by through traffic is discouraged.
(4) Parallel streets or service roads may be required along an existing or proposed major arterial thoroughfare to provide access to lots along such major arterial thoroughfares.
(5) Service drives shall be designed to provide only secondary access.
(c) Right-of-Way Widths and Grades.
Classification | Minimum Right-of-Way Width (in feet) | Maximum Grades (percent) | |
1 | Divided Major | 100 | 5 |
2 | Major | 70 | 5 |
3 | Collector | 60 | 7 |
4 | Minor | 60 | 8 |
5 | Industrial | 60 | 6 |
6 | Private Drive - Marginal Street | 8 | |
7A | Cul-de-sac | 120 | |
7B | Cul-de-sac | 120 | |
Street grades, whenever feasible, shall not exceed the due allowance for reasonable vertical curves. No street grade shall be less than five-tenths of one percent.
(d) Cul-de-sacs and Dead-End Streets. Streets designed to be permanently dead ended shall not be longer than 600 feet, unless a greater length is approved by the Planning Commission, and shall be provided, at the closed end, with a turnaround having an outside pavement diameter of at least 100 feet and a street property line diameter of at least 120 feet. Interior planting circles may be allowed, with the approval of the Planning Commission and the City Engineer. If such dead-end or cul-de-sac street is of a temporary nature and a future extension into adjacent land is anticipated, then such turning circle, beyond the normal street width, shall be in the nature of an easement over the premises included in the turning circle, but beyond the boundaries of the street proper. Such easement shall be automatically vacated to abutting property owners, when the dead-end street is legally extended into adjacent land. If a dead-end street extends only one lot depth past a street intersection, no turnaround will be required. A subdivider shall be required to dedicate to the public use a strip of land five feet in width at the end of all dead- end streets created. Such five-foot strip shall be vacated upon extension of the street dedication.
(e) Corner Radii. Property lines at street intersections shall be rounded with a radius of not less than fifty feet for all major arterial thoroughfares, thirty feet for all collector and local industrial streets and twenty feet for all minor streets. Chords or cutoffs may be permitted in place of rounded corners.
(f) Half Streets. Half streets shall be prohibited except where there is an existing half-street adjacent to the subdivision, in which case the remaining half of the street shall be platted.
(g) Horizontal and Vertical Curves. Angles in the alignment of street lines shall be connected by a curve with a radius on the centerline of not less than 200 feet for local streets, 300 feet for collector and industrial streets and 500 feet for major arterial thoroughfares. Between reverse curves there shall be a tangent at least 100 feet long on major arterial thoroughfares. The minimum length of vertical curves shall be 100 feet.
(h) Intersections. Streets shall be laid out to intersect as nearly as possible at right angles and no street shall intersect any other street at an angle of less than sixty degrees. Three-way stop intersections are encouraged, but in no event shall an intersection containing more than four stop streets be approved.
(i) Street Jogs. Street jogs with centerline offsets of less than 125 feet shall be prohibited. If deemed necessary by the City Engineer, the minimum distance between centerline offsets shall be increased.
(Ord. 95-71. Passed 1-24-72.)
(Ord. 95-71. Passed 1-24-72.)
(j) Energy Conservation. Whenever new residential construction is proposed, the Planning Commission shall, in an effort to maximize energy conservation, give priority to the approval of those plats where maximum use of east-west streets, as opposed to north-south streets, will occur. Wherever practicable, residential structures should be built with their roof lines running east and west in order to permit maximum sun exposure on the south side of a dwelling unit. This orientation will ensure that generous amounts of sunlight will enter the dwelling during winter, bringing added warmth and reducing the amount of fuel needed for indoor comfort. For the same reason, glass areas should be minimized on the north and east side, and especially on the west side, of all new residential dwellings. Additional energy savings can be gained by specifying the incorporation of roof overhangs into residential building design.
(Ord. 133-81. Passed 3-8-82.)
(Ord. 133-81. Passed 3-8-82.)