Every parcel of land hereafter used as a public or private parking area, including a commercial parking lot and also an automobile or trailer sales lot, shall be developed and maintained in accordance with the following requirements:
(a) Screening and Landscaping. Off-street parking areas for more than five vehicles shall be effectively screened on each side which adjoins or faces premises situated in any R District, or institutional premises, by a masonry wall or solid fence of acceptable design. Such wall or fence shall be not less than four feet or more than six feet in height and shall be maintained in good condition without any advertising thereon. In any R District the space between such wall or fence and the nearest side lot line or the front lot line, shall be landscaped with grass, hardy shrubs or evergreen ground cover and maintained in good condition. In case the capacity of the parking area exceeds thirty vehicles, it shall be screened by a masonry wall of a height hereinabove prescribed.
(b) Minimum Distance and Setbacks. No part of any parking area of more than five vehicles shall be closer than ten feet to any dwelling, school, hospital or other institution for human care located on an adjoining lot unless screed by an unpierced masonry wall, if not in any R District but adjoining such district, that part of the parking area within fifty feet of any R District shall not be located within twenty- five feet from the established street right-of-way line.
(c) Surfacing. Any off-street parking area for more than five vehicles shall be surfaced with an asphaltic or Portland surface, shall be so graded and drained as to dispose of all surface water accumulated within the area, and shall be so arranged and marked as to provide for orderly and safe loading or unloading and parking and storage of self-propelled vehicles. The foregoing requirements with respect to surfacing shall not apply to a parking area in an M District if more than 200 feet distant from any R District, except that a dustless surface shall be provided in any case.
(d) Lighting. Any lighting used to illuminate any off- street parking area shall be so arranged as to reflect the light away from adjoining premises in any R District.