Chapter 12.20
DRIVEWAYS
Sections:
12.20.020 Construction—Where prohibited.
12.20.030 Materials for construction.
12.20.050 Requirements for width.
12.20.070 Side slopes—Distances.
12.20.080 Clearance from other facilities.
12.20.090 Additional prohibited locations for construction.
12.20.100 Curb return encroachments.
12.20.110 Deviations on construction.
12.20.010 Definition.
“Driveway” means that portion of the road right of way between the property line and curb or between the property line and the pavement if no curb exists where motor vehicles enter or leave the highway onto private property. (Ord. 61 § 2 (part), 1959: Ord. 46 § 108, 1957)
12.20.020 Construction—Where prohibited.
A driveway shall not be constructed or maintained where fences, buildings, natural grade, or any other obstacle will prevent a motor vehicle from being stored entirely off the public right of way after entering such driveway. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.2, 1957)
12.20.030 Materials for construction.
Driveways shall be constructed of cement concrete where a cement concrete curb exists. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.1, 1957)
12.20.040 Width designated.
The width of an individual driveway shall be considered as being the net width thereof, exclusive of side slopes and returns, measured along the line of the curb or centerline of the highway. (Ord. 61 § 2 (part), 1959; Ord. 46 § 109, 1957)
12.20.050 Requirements for width.
The width of an individual driveway shall be not less than ten feet and shall not exceed in width:
(1) Twenty feet if the driveway serves only residences or apartments;
(2) Twenty feet for lots or parcels of land less than one hundred feet wide;
(3) Where the driveway serves other than residences or apartments on a lot or parcel of land less than one hundred feet wide, thirty feet or twenty percent of the front frontage of the lot or parcel of land, whichever is greater, but not to exceed sixty feet. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.3, 1957)
12.20.060 Aggregate width.
The aggregate width of the total number of driveways servicing any single lot or parcel of land from any one highway shall not exceed, along such highway of the lot or parcel of land so served:
(1) Forty percent, of the frontage, if the driveway serves only residences or apartments;
(2) Sixty percent of the frontage in other cases. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.4, 1957)
12.20.070 Side slopes—Distances.
The minimum intervening distance between the side slopes or returns of adjacent driveways serving the same lot or parcel shall be twenty-two feet. In case of adjacent driveways serving two adjoining lots or parcels, the intervening distance between the side slopes or returns shall be at least one foot; otherwise a common or continuous driveway will be required. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.5, 1957)
12.20.080 Clearance from other facilities.
If utility poles, anchors, hydrants, lighting standards, or other facilities exist in the parkway adjacent to a proposed residential driveway, a minimum clearance of two feet will be required from the facility to the top of the side slope. On commercial driveways, the corresponding distance shall be four feet. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.6, 1957)
12.20.090 Additional prohibited locations for construction.
A driveway shall not be constructed:
(1) Between the prolonged intersecting property lines of any highways; or
(2) Between the points of curvature of any curb return having a radius of twenty feet or less.
In applying the provisions of this section the condition producing the greater length of curb between the specified control points in the particular case shall govern. (Ord. 61 § 1 (part), 1959: Ord. 46 § 121.7, 1957)
12.20.100 Curb return encroachments.
A driveway shall not be constructed between the points of curvature of any curb return except:
(1) In the case of a curb return having a radius of twenty-five feet or more, driveways may encroach at each end thereof for a distance not greater than one eighth of the total arc length of return, leaving in the clear at least three quarters of such arc length, if such encroachment does not conflict with other requirements of this chapter.
(2) In the case of a curb return having a radius of less than twenty-five feet but more than twenty feet, the maximum permissible encroachment at each end of the return, subject to other requirements of this chapter, shall be that proportion of one-eighth of the total arc length that the difference between the length of the radius and twenty feet bears to five.
Notwithstanding any of the foregoing provisions, a driveway shall not encroach on any curb return beyond or ahead of any traffic regulating device located on or adjacent thereto. (Ord. 61 § 2 (part), 1959: Ord. 46 § 121.8, 1957)
12.20.110 Deviations on construction.
Where topographical or traffic conditions are such that a modification of the provisions of Sections 12.20.020, 12.20.030, 12.20.050, 12.20.060, 12.20.070 or 12.20.080 are necessary for the promotion of traffic safety, and the commissioner so finds, he may permit a deviation from the provisions of such sections to the extent which he finds is necessary. (Ord. 61 § 3, 1959: Ord. 46 § 121.9, 1957)