No solid fences shall be erected in a required front yard area in any zone district in the Borough of Dunellen. However, on a corner lot or a through lot, only the street frontage to which the front entrance is oriented shall be considered a front yard area. The remaining yard area abutting a street may be fenced with a solid fence not exceeding six feet in height, but no fence may be erected in any portion of the Borough's right-of-way, and all fences must be located on or within the boundary line. This subsection shall not preclude a property owner from replacing an existing side yard fence, although the existing side yard fence may be constructed in the Borough's right-of-way. For purposes of this section, a "solid fence" shall be defined as a fence in which less than 50% of the area is open.