There shall be no more than one driveway approach for each sixty feet of lot width at a property line adjacent to a public right-of-way for any lot intended to be developed for single-family or two-family use. A multiple-family lot may have one driveway approach for each fifteen living units, provided that such approaches do not exceed the standard city width and do not occupy more than sixty percent of the property line adjacent to the public right-of-way. In all cases a multiple-family lot may have a least two standard-width driveway approaches provided the lot exceeds seventy feet in width. (Ord. 90-1 (part), 1990)