Permitted uses in a buffer yard include screening (including vegetation and fencing), stormwater management facilities, underground utility facilities and easements, signs (in accordance with Article XVII of this chapter), and sidewalks/pedestrianways, driveways and access drives shall be permitted to cross required buffer yards. Buildings, structures, outdoor storage and/or sales of vehicles, equipment, materials, trash and waste disposal facilities, and off-street loading and off-street parking shall not be permitted in a required buffer yard.