(a) Proposed streets shall be properly related to City, County and State road and highway plans which have been prepared and officially adopted.
(b) Streets shall be logically related to the topography so as to produce usable lots and reasonable grades.
(c) Minor streets shall be so laid out as to discourage through traffic, but provisions for street connections into and from adjacent areas will be generally required.
(d) Where a subdivision abuts or contains an existing or proposed arterial street, the Planning Commission may require a marginal access road, reverse frontage, or other treatment which will provide protection for abutting properties, reduction of number of intersections, and separation of local and through traffic.
(e) Half streets shall be prohibited except to complete an existing half street.
(f) Maximum Allowable Grades:
Street | Percent |
Collector | 8 |
Minor | 14 |
(g) Minimum grades on all streets shall not be less than one-half percent (0.50%).
(h) Vertical curves shall be installed on all street grade changes exceeding one percent (1%).
(i) Alignment. Minimum centerline radius for horizontal curves:
Street | Feet |
Collector | 150 |
Minor | 200 |
(j) Widths. Minimum street right-of-way widths and cartway widths shall be as follows:
Type of Street | Type of Development | Cartway (ft.) | Right of Way (ft.) |
Minor and Marginal Access: | Single-family lots one hundred feet or more in width or plan of less than twenty lots | 20 | 50 |
Single-family lots sixty feet to one hundred feet | 22 | 50 | |
Commercial or industrial | (as determined by Commission) | ||
Collector: | Single-family lots in one hundred feet width or over | 24 | 50 |
Single-family lots sixty feet to one hundred feet | 28 | 50 | |
Multi-family, commercial or industrial | 32 | 50 | |
(k) Cul-de-sacs. Cul-de-sacs are permitted where the length does not exceed six hundred feet and where a turnaround with a roadway diameter of eighty feet and a right of way of one hundred feet is provided.
(l) Street Intersections.
(1) All curbs at intersections shall be rounded by a minimum radius of twenty feet.
(2) Where the grade of any street at the approach to an intersection exceeds five percent (5%), a leveling area shall be provided with a transitional grade not to exceed two percent (2%) for a distance of fifty feet from the nearest right- of-way line of the intersection.
(3) Multiple intersections of more than four roads shall be avoided.
(4) Minimum street intersection angles shall be not less than sixty degrees.
(m) Street offsets of less than one hundred twenty-five feet are to be avoided.
(n) Reverse curves shall have a minimum tangent between them of:
Streets | Feet |
Collector | 75 |
Minor | 50 |
(o) Alleys.
(1) Not permitted in residential areas.
(2) Permitted in commercial and industrial areas subject to approval of the Commission. (Ord. 208. Passed 6-7-61.)