Except in A, R-1 and R-2 districts, wherever any such driveway passes by the wall or wall of a dwelling, the driveway shall be distant from such wall not less than ten feet. Every driveway adjacent to a pedestrian path or sidewalk running parallel thereto, shall have a curb or equivalent buffer not less than four inches high along that side of the paving. (Prior gen. code § 8-63.6)