Be so located as to interfere with the visibility
or effectiveness of any official traffic sign or signal or with driver
vision at any access point or intersection.
Be erected, relocated, or maintained so as to prevent
free ingress or egress from any door, window, or fire escape, and
no sign shall be attached to a standpipe or fire escape.
Be located on a lot so as to reduce the required dimensional
setback and side yard requirements of the district in which it is
located, exception to above being that all signs may be set back one
foot from the road right-of-way limit, as opposed to the specified
setback requirement of structures from public roads in each district.