All parking and loading spaces, access driveways, and maneuvering areas required by this title shall be graded and well drained and shall be maintained with all-weather dust-free surfacing. In all districts except A, R-1 or F-P districts they shall be paved with asphaltic concrete or portland cement concrete. Whenever the exterior boundary of an open parking area providing space for five or more automobiles is less than ten feet from any other lot in an R district, such areas shall be screened therefrom by a solid masonry wall, a compact evergreen hedge or a fence having a height not less than the maximum permitted under Section 17.52.430. Lighting of parking and loading spaces shall be so arranged as to be directed downward and away from any residential area. (Prior gen. code § 8-63.10)