The length of driveway approach aprons shall not exceed the following dimensions:

(a) For residential driveways, twelve feet for single driveways and twenty feet for double driveways.

(b) For commercial driveways, when one or more driveway approaches serve a given property frontage, no single apron shall exceed thirty feet in length if the property abuts a street where the prima facie speed is twenty-five miles or less per hour; or thirty-five feet where the prima facie speed limit is above twenty-five but under forty-five miles per hour; or forty feet where the prima facie speed limit is forty-five or more miles per hour; but any length in excess of thirty-five feet is subject to the approval of the director of public works. A safety island of not less than twenty feet of full height curb shall in all cases be provided between driveway approaches serving any one property frontage.

(c) Property frontage referred to herein includes approach areas directly in front of property owned or under the control of the applicant, and such area as may be opposite adjoining property which is used for approach purposes by right of easement or agreement with adjoining property owner.

(d) Any driveway which has become abandoned or unused through a change of the conditions for which it was originally intended, or which for any other reason has become unnecessary, shall be closed and the owner shall replace any such driveway approach with a standard curb and sidewalk to be constructed, according to the city's general specifications. (Ord. 993 § 4; January 22, 1968: prior Ord. B-1996 § 6; February 4, 1957).