(A) Design and arrangement.
(1) The arrangement of streets in new subdivisions shall make provision for the continuation of the principal existing streets in adjoining areas (or their proper projection where adjoining land is not subdivided) insofar as they may be deemed necessary for public requirements.
(2) The street arrangement shall be such as to not cause hardship to owners of adjoining property when they plat their own land and seek to provide for convenient access to it. Residential streets shall be so designed as to discourage through traffic, but offset streets should be avoided except as they are separated by not less than 400 feet at their access points on a collector street.
(3) The angle of intersection between minor streets and major streets should not vary by more than ten degrees from a right angle. All other streets should intersect each other as near to a right angle as possible and no intersection of streets at angles of less than 70 degrees shall be permitted.
(4) Residential streets shall be designed to discourage through traffic which may otherwise use secondary or major highways, and whose origin and designation are not within the subdivision. Residential streets extending for considerable distance, parallel to any secondary or major streets, should be avoided.
(5) Streets planned to serve multifamily, business or industrial areas shall connect directly to major or collector streets, so as to not generate large volumes of traffic on local residential streets.
(B) Alignment.
(1) Vertical profile grades for main thoroughfares shall be connected by vertical curves of a minimum length equivalent to 20 times the algebraic difference between the rates of grade, expressed in feet per hundred; for secondary and minor streets and alleys, 15 times.
(2) Minimum Horizontal-radii of centerline curvature:
Arterial highways | 8° | 650 ft. |
Main thoroughfares | 12° | 475 ft. |
Secondary thoroughfares | 19° | 300 ft. |
Minor streets | 28° | 200 ft. |
Streets shorter than 500 ft. | 58° | 100 ft. |
A minimum 50-foot tangent shall be introduced between reverse curves.
(3) Visibility requirements.
(a) Minimum vertical visibility (measured 4-1/2 ft. eye level to taillight 18 inches above ground level).
900 ft. on limited access arterials
500 ft. on main thoroughfares
300 ft. on secondary thoroughfares
200 ft. on minor streets
100 ft. on streets shorter than 500 ft.
(b) Minimum horizontal visibility shall be:
900 ft. on limited access arterials measured on centerline.
500 ft. on main thoroughfares, measured on centerline.
300 ft. on secondary thoroughfares, measured on centerline.
100 ft. on all other streets, measured on centerline.
(C) Street and alley width.
(1) The width of all major thoroughfares shall conform to the width designated on the Major Thoroughfare Plan of the municipality and of Fulton County.
(2) The minimum right-of-way widths for streets and alleys are as follows:
Type of Street or Way | *Minimum right- of-way width or **Variable right- of-way width |
Type of Street or Way | *Minimum right- of-way width or **Variable right- of-way width |
Arterial highway or major thoroughfare (See Major Thoroughfare Plan) | **Variable |
Secondary or collector streets | 70 - 80 ft. |
Minor or local urban streets | 60 ft. |
Rural roads and streets serving low density suburban development | 50 - 60 ft. |
Alleys | 30 ft. |
Cul-de-sacs | 50 ft. |
*More right-of-way may be required in areas where ditches are used in place of curbs and gutters as determined by the Commission. | |
**As specified by major thoroughfare plan or as determined by the Commission. | |
(3) Cul-de-sacs. Each cul-de-sac shall be provided with a turn-around having a minimum right-of-way radius of 60 feet and maximum length of 430 feet, measured from the intersection of the centerlines of the entering intersection, and including the turn-around. The outside of the paved road surface within the turn-around right-of-way shall have a minimum radius of 40 feet.
(4) Dead-end streets. Streets designated to be dead-ended permanently shall not be permitted. Any dead-end street of a temporary nature, if longer than 200 feet or fronted by existing lots, shall have a surfaced turning area equal in diameter to that required for a cul-de-sac. There shall be provision made for the future extension of the street and utilities and shall be a revisionary right to the land owners abutting the temporary turn-around for the excess right- of-way.
(5) Half-streets. Dedication of half-streets shall be discouraged. Where there exists a dedicated or platted half-street adjacent to the tract being subdivided, the other half shall be platted if deemed necessary by the Commission.
(6) Alleys. Alleys shall be avoided in single or two-family districts. They may, however, be required in multiple dwelling developments. Alleys are required in the rear of all commercial and industrial lots if no other provisions are made for adequate service access or for access to parking. The right-of- way of such alleys shall not be less than 30 feet and dead-end alleys shall not be permitted.
(7) Street grades (vertical curves). No street grade shall be less than 0.5% and shall not exceed the following with due allowances for reasonable vertical curves:
Main or arterial thoroughfares | 5% |
Secondary thoroughfares | 6% |
Minor streets | 8% |
Cul-de-sacs | 10% |
(8) Street grades (cross section). The gradients of streets shall be not less than 0.5% without curb and gutter and 0.3% with curb and gutter. On streets where curbs, gutters and sidewalks are not required, there shall be a berm, the width of which shall be determined by the applicable street cross-section which is a part of the Major Thoroughfare Plan.
(9) Street names. Street names shall be selected which will not duplicate or be confused with the names of existing streets in the county, irrespective of modifying terms such as street, avenue, boulevard, and the like. Street names shall be subject to the approval of the Commission and wherever possible shall be in accordance with the following system:
General Direction | Long Continuous | Short Disconnected |
North-south | Streets | Courts |
East-west | Avenues | Places |
Diagonal | Roads | Ways |
Curving | Drives | Lanes or circles |
(10) Street signs. Street signs shall be required and paid for by the developer at all intersections and shall be erected in accordance with the specifications of the municipality. All such signs shall also be subject to the approval of the Commission as to uniform design and legibility.
(Ord. 1155, passed 1-10-1966) Penalty, see § 151.999