The approving authority shall have the power to waive any of the buffer zone requirements if they determine an adequate buffer can be provided in less than five feet while maintaining the purpose of this section. The approving authority shall review the proposed development and the standards and purposes for buffers considering the location of buildings, parking areas, outdoor illumination and topographic features of the area and existing features of natural vegetation; the efficiency, adequacy and safety of the proposed layout of driveways, streets, sidewalks and pedestrian walkways; the adequacy and location of existing green areas and buffer zones; the adequacy and location of screening and parking areas; structures and uses; and similar features.