Except as otherwise provided, a solid fence, wall or hedge must be erected, placed, grown and maintained along a boundary line of any commercial use or district when adjacent to any residentially zoned property to a height of not less than six feet (6') nor more than eight feet (8') above ground level. When a parking lot or facility is adjacent to any residential use or boundary, then a fence, wall or hedge will be required along the common boundary in order to provide suitable screening. Such fence, wall or hedge must be at least three and one-half feet (3-1/2') in height. However, no fence, wall or hedge on a corner lot shall have a height in conflict with the regulations governing visibility at intersections as prescribed in Section 4-C(6) of these regulations. Also, no fence or wall shall be erected or placed in any dedicated easement or right-of-way.