(A) Widths. Street right-of-way widths shall be as shown in the comprehensive plan and, where applicable, shall conform to county and state standards for trunk highways. In general, minimum widths should be as follows:
(1) Freeways: 300 feet;
(2) Arterials: 150 feet;
(3) Collectors: 66-80 feet; and
(4) Local Streets: 50-60 feet.
(B) Horizontal alignment. When connecting street lines deflect from each other by more than ten degrees, they shall be connected by a curve with a minimum radius of 300 feet for collector street and 100 feet for local streets.
(C) Vertical alignment. Different connecting street gradients shall be connected with vertical curves. Minimum sight distance shall be 200 feet for local streets an 300 feet for collector streets measured from points five feet above the street centerline.
(D) Minimum and maximum grades.
Minimum | 0.5% |
Maximum | 4% for collector streets |
7% for local streets |
(E) Minimum carrying capacity. Seven-ton axle loading based on traffic volumes for local streets and nine-ton axle loading for arterial and collector streets.
(F) Local streets. Local streets shall be laid out so that their use by through traffic will be discouraged.
(G) Cul-de-sacs. Maximum length: 700 feet. Minimum radius of turnaround (right-of-way): 60 feet. Where certain topographic features or other unusual circumstances dictate, special consideration may be given to longer cul-de-sacs. Provisions must be made to loop watermains through cul-de-sacs to avoid excessive dead end mains.
(H) Direct access to major thoroughfares. In the case where a proposed plat is adjacent to a freeway or arterial or collector street as defined by the comprehensive plan, there shall be no direct access from individual lots to such major thoroughfares.
(I) Half streets. Half streets shall be prohibited except where it will be practical to require the dedication of the other half when the adjoining property is subdivided, in which case the dedication of a half street may be permitted. The probable length of time elapsing before dedication of the remainder shall be considered in this decision.
(J) Private streets. Private streets shall not be permitted, except in areas where homeowner associations have been approved by the city, nor shall public improvements be approved for private streets.
(K) Street names. Street names shall comply with the city's county street naming and numbering system.
(L) Stub streets. Where adjoining lands are not subdivided, some of the streets in the new subdivision shall be required to be extended to the boundary fine of the tract to make provision for future access into adjacent areas.
(M) Street continuation and extension. The arrangement of streets shall provide for the continuation of existing streets from adjoining areas into new subdivisions where appropriate.
(N) Street location and dedication. All subdivisions shall be required to conform to the comprehensive plan. Arterials and collector streets shown on the comprehensive clan shall be included in subdivisions, unless waived by the city.
(Ord. 141, passed 7-7-1997, Ord. passed 4- -2007) Penalty, see § 152.999