(a) General Street Standards.
(1) The arrangement, character, extent and location of all streets conform to the adopted General Development 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.
(2) Existing or projected collector streets in adjoining areas shall be continued in new subdivisions and local residential streets shall be continued to prevent dead-end streets.
(3) No street arrangement shall be approved that prevents convenient future access to adjoining undeveloped property.
(4) Local residential streets shall be designed so as not to offer direct routes to through traffic.
(5) Where a subdivision abuts or contains an existing or proposed arterial street, the Planning Commission may require marginal access streets, reverse frontage with screen planting contained in nonaccess reservation along the rear property line, deep lots with rear service alleys or other such treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic.
(6) Where subdivision borders on or contains a railroad right of way or limited access highway right of way, the Planning Commission may require a street parallel to and on each side of such right of way, at a distance suitable for the appropriate use of the intervening land, as for park purposes in residential districts, or for commercial or industrial purposes in appropriate districts. Such distances shall also be determined with due regard for the requirements of approach grades and future grade separation.
(b) Street Classifications. Street classification is the designation of streets and highways into systems according to the function they perform. The systems used for the Street Classification are:
(1) Freeway. A divided multi-lane highway for through traffic with all crossroads separated in grade and with full control of access.
(2) Expressway. A divided arterial highway (not a freeway) for through traffic with full or partial control of access, medians, at grade intersections and some grade separations.
(3) Arterial. A general term denoting a highway primarily for through traffic usually on a continuous route. This facility provides for through traffic movement between areas across the County and to and from expressways. An arterial also provides access to abutting property but parking and loading may be restricted to improve the capacity for moving traffic.
(4) Collector. A street providing for traffic movement between major arterials and local streets and direct access to abutting property. This facility provides for the internal traffic movement within an area of the County.
(5) Local. A street or road whose present function is to provide access to residence, business or other abutting property. A local moves a vehicle from an individual property to the nearest collector. A local differs from a residential in that it has multi-family or commercial development or it has the potential to become a collector if future development occurs in adjacent areas.
(6) Residential. A street or road whose function is to provide access to residences or other abutting property. A residential moves a vehicle from an individual property to the nearest local or collector.
(c) Street Right Of Way.
Classification | Minimum Right of Way in Feet | Minimum Pavement Width |
Freeway | 150 | 2-24' pavements |
Expressway | 150 | and median |
Arterial | 80 | 48+ turn lanes |
Local-Collector-Residential -Commercial | 60-80 | 40 |
Residential-Multiple-Family, Single Family and Two-Family | 50 | 30 |
(Ord. 4-1978. Passed 3-6-78.) | ||
R-4 Single family, less than 1,000 feet in length | 50 | 28 |
(Ord. 116-1991. Passed 8-5-91.) | ||
(d) Intersections.
(1) Streets shall intersect as nearly as possible at right angles and no street shall intersect any other at less than a 70 degree angle.
(2) Intersections shall have centerline offsets of not less than 150 feet.
(3) Right-of-way lines at street intersections shall be rounded with a radius of not less than thirty-five feet for arterials and twenty-five feet for collectors, locals and residentials.
(4) Intersection sight distance standards shall be provided at all intersections of subdivision streets with existing highways as follows: intersections with arterial and collector streets, 350 feet; with local streets, 235 feet.
(e) Horizontal Alignment. Angles in the horizontal alignment of street lines shall be connected by a curve with a radius on the centerline of not less than 250 feet for local streets and 500 feet for collector streets. Between reverse curves there shall be a tangent of at least 100 feet on collector streets.
(f) Vertical Alignment. Vertical curves shall provide the following stopping site distances: arterials, 500 feet; collectors, 350 feet; and locals, 235 feet.
Grades shall not exceed six percent (6%) on collector streets or ten percent (10%) on local streets except in the case of unusual topographic conditions as approved by the City Engineer. No street shall have a grade less than one-half of one percent (0.5%).
(g) Cul-de-sac. Streets designed to be permanently dead-ended shall not be longer than 600 feet and shall be provided at the closed end with a turnaround when approved by the Planning Commission. If such a street is of a temporary nature and a future extension into adjacent land is anticipated then such turnaround beyond the normal street width shall be in the nature of an easement over the premises included in the turnaround, but beyond the boundaries of the street proper. Such easements shall be automatically vacated to abutting property owners when the dead-end street is legally extended into adjacent land. If such dead-end street extends only one lot depth past a street intersection, no turnaround will then be required.
(h) Temporary Dead-End Streets. Temporary dead-end streets shall be permitted only when:
(1) No lots front, or can be designed to front, on a dead-end street.
(2) Lots front on a dead-end street that is no longer than 200 feet.
(3) The dead-end street is part of a street required by the Planning Commission and a temporary turnaround of a design satisfactory to the Planning Commission is provided.
(i) Half-Streets.
(1) Half-streets shall not be permitted except where such streets are essential to the reasonable development of the proposed subdivision in conformity with the other requirements of these regulations and where the Planning Commission finds that it will be practicable to require the dedication of the other half of the street when the adjoining property is subdivided.
(2) Wherever an existing half street is adjacent to a tract to be subdivided, the other half of the street shall be platted within such tract.
(3) Half-streets shall be not less than one-half the standard width for the appropriate street classification.
(4) Any plat dedicating a temporary dead-end or a half street shall include a plat restriction prohibiting any easement or right of access to the temporary dead end of half-street from any abutting or adjoining property save from lots platted in conformity with these Regulations.
(j) Street Name Signs. The subdivider shall install at his cost a street sign showing the names of all streets at all street intersections. The signs shall conform to the City's regulations as adopted by Council.
(k) Street Names. New streets which are extensions of, or in alignment with existing streets, shall bear the name of the existing street. New street names adopted must not be confusing with existing street names. All new streets shall be designated as follows:
General Directions | Designation |
North and South | Streets |
East and West | Avenues |
Northeast-Southwest diagonals | Roads |
Northwest-Southeast diagonals | Drives |
Cul-de-sac or loop streets | Circles |
Minor Residential Streets North and South | Place |
Minor Residential Streets East and West | Lane or Court |
(l) Planting Screens or Fences. The Planning Commission may require and permit planting screens or fences where reverse frontage lots abut a major arterial street or between a major arterial thoroughfare and marginal access street, provided that such planting screens or fences shall be submitted for approval with the final plat. (Ord. 4-1978. Passed 3-6-78.)