No sign shall be erected at the intersection of any streets in such a manner as to obstruct free and clear vision; or any location where by reason of the position, shape or color, it may interfere with, obstruct the view of or be confused with any authorized traffic sign, signal or device; or which makes use of the words "STOP", "LOOK", "DRIVE-IN", "DANGER" or any other word, phrase, symbol or character in such manner as to interfere with, mislead or confuse traffic.