14-608: DRIVEWAY REGULATIONS:
   A.   Standard Driveway Dimensions:
      1.   For purposes of this chapter, allowable driveway dimensions shall vary with the type of land use they serve as classified under the zoning ordinance, and as follows:
         a.   Residential driveways serve one- and two-family dwelling sites.
         b.   Multi-family driveways serve three (3) or more dwellings and uses permitted on review in a residential district and churches.
         c.   Commercial driveways serve uses permitted by right and upon review in any commercial zoning district.
         d.   Industrial driveways serve uses allowed only in industrial zoning districts.
      2.   Allowable driveway dimensions are hereby established as contained in table 1, "Standard Driveway Dimensions", of this section.
The requirements of the table of standard driveway dimensions and the terms used therein are illustrated in section 14-610, figures 1 through 5 of this chapter.
   B.   Limitations On Number And Total Driveway Opening:
      1.   In order to restrict the number of points of conflict between traffic upon a public street and traffic entering and exiting private property, the number and total width of driveways shall be limited in proportion to the street frontage of the property served, in accordance with table 2, "Limitations On Number And Total Driveway Opening", of this section.
      2.   The limitations on driveways shall be applied to individual tracts of record under the same ownership as shown in the office of the county clerk for Stephens County.
      3.   Calculation of allowable driveways and widths shall be based on a single street frontage. Properties with frontage on two (2) or more streets shall have limitations calculated for each frontage. Allowable driveways and widths must be located adjacent to the frontage on which they are based.
   TABLE 1
   STANDARD DRIVEWAY DIMENSIONS
Type Of Use5
Standard Dimensions
Separation And Setback Between Intersecting1,2
Width
Radius
Minimum
Maximum
Minimum
Maximum
Drives3
Street4
Type Of Use5
Standard Dimensions
Separation And Setback Between Intersecting1,2
Width
Radius
Minimum
Maximum
Minimum
Maximum
Drives3
Street4
Residential
12 feet
25 feet6
5 feet
10 feet
20 feet
10 feet
 
30 feet
Maximum width may be increased to 30 feet where residential drive serves garages with more than 16 feet of opening facing directly upon a local or collector street. Other provisions of tables 1 and 2 of this section shall still apply.
Multi-family and commercial:
 
 
 
 
   One-way
12 feet
16 feet
15 feet
25 feet
20 feet
20 feet
   Two-way
24 feet
36 feet
15 feet
25 feet
20 feet
20 feet
Industrial:
   One-way
12 feet
30 feet
30 feet
-
40 feet
20 feet
   Two-way
24 feet
50 feet
30 feet
-
40 feet
20 feet
 
Notes:
   1.    Distances are measured from point of radius/return at edge of street or curb.
   2.    Setback from an interior property line shall be at least 1 foot from radius/return.
   3.    Pairs of one-way drives separated by an island of between 5 and 20 feet shall be considered a single driveway.
   4.    See subsection C of this section for additional setback requirements on or adjacent to major streets.
   5.    Residential properties shall provide a minimum of 2 off street parking spaces per dwelling.
   6.    Maximum driveway width and total driveway opening allowed subject to additional limitations in table 2 of this section.
   TABLE 2
   LIMITATIONS ON NUMBER AND
   TOTAL DRIVEWAY OPENING
 
Street Frontage
Maximum
Number Of Drives
Total Driveway
Opening Permitted1
Less than 200 feet
2
50 percent of frontage or 70 feet, whichever is less
200 to 400 feet
3
Not to exceed 100 feet total
400 to 800 feet
3
Not to exceed standard dimensions
800 or more feet
1 plus 1 per 400 feet
Not to exceed standard dimensions
 
   Note:
      1.    Individual drives shall not exceed width allowed in table 1, "Standard Driveway Dimension", of this section.
   C.   Driveways On Or Adjacent To Major Streets And Section Line Roads:
      1.   Except as provided in subsection C2 of this section, no portion of a driveway upon a major street or section line road shall be located closer to the right of way of an intersecting major street or section line road than a distance equal to one-half (1/2) of the frontage upon which the driveway is located or fifty feet (50'), whichever provides the greater setback; provided, that a setback of over one hundred fifty feet (150') shall not be required.
      2.   Driveways located upon properties at the intersection of two (2) major streets shall not be required to meet the provisions of subsection C1 of this section, when entering upon a divided roadway with a median which prohibits exiting vehicles from making left hand turns.
      3.   Residential lots with primary frontage upon a local street shall not be permitted secondary driveway access from a major street or section line road from the rear yard or side yard of such lots.
   D.   Angle Of Intersection With Street:
      1.   Driveways should intersect with the public street at right angles whenever feasible. In no instance shall the angle of intersection be less than seventy five degrees (75°).
      2.   The angle of intersection shall be measured upon a line from the center points of the driveway at the edge of the street and at the right of way line.
      3.   On curvilinear streets or cul-de-sacs, the angle of intersection shall be measured from the tangent of the street radius.
   E.   Alternative Design Options:
      1.   Insufficient Right Of Way For Radius: When a full radius cannot be achieved due to insufficient separation between the right of way and back of curb or street edge, the radius may be either:
         a.   Terminated at the right of way; or
         b.   Extended beyond the right of way.
      2.   Compound Radius Returns: When desired, a compound radius may be laid upon the right of way in order to allow easier access to paved areas immediately behind the right of way line; provided, that the minimum radius is maintained to within five feet (5') of the right of way.
      3.   Existing Conditions And Driveways: It is the intent of this chapter to require modification of existing driveways as a condition for approval of building permits for the remodeling or expansion on commercial and industrial properties. In instances where full compliance with these standards is impractical, the public works director may require alternative improvements in order to control turning movements and restrict the number and width of driveways. These alternative improvements may include, but shall not be limited to:
         a.   Reduction of existing driveway openings;
         b.   Installation of radius/returns;
         c.   Installation of barrier islands adjacent to the edge of street;
         d.   Modification of parking arrangement or striping in order to restrict backing onto a public street.
   F.   Interpretation Of Design Terms: Words and terms used in this chapter shall be interpreted as follows:
    DRIVEWAY: Any facility, pavement or construction intended or used for vehicular ingress and egress from a street to private property, within the limits of the right of way as herein defined.
   DRIVEWAY WIDTH (W): The width of a driveway at the right of way measured parallel to the right of way, or the narrowest dimension of the driveway measured perpendicular to the centerline if drive is not at a ninety degree (90°) angle to the street.
   RADIUS/RETURN: A true radius from the back of curb or edge of pavement toward the right of way. The radius/return shall begin at a right angle to the right of way and continue on an arc of not less than seventy five degrees (75°).
   RIGHT OF WAY (ROW): Either:
      1.   The limits of existing right of way platted, dedicated or deeded to the public for street purposes; or
      2.   The limits of future right of way required as designated by the major street plan of the city of Duncan, whichever is greater.
   STREET: The paved portion of a street right of way intended for vehicular traffic and/or parking where permitted. (Ord. 1263, 1-13-1987)