§ 1114. Display of unauthorized signs, signals, or markings. (a) No
person shall place, maintain, or display upon or in view of any highway
any unauthorized sign, signal, marking or device which purports to be or
is an imitation of or resembles or is likely to be construed as an
official traffic-control device or railroad sign or signal, or which
attempts to direct or regulate the movement of traffic, or which hides
from view or interferes with the effectiveness of any official
traffic-control device or any railroad sign or signal.

(b) No person shall place or maintain nor shall any public authority
permit upon any highway any traffic sign or signal bearing thereon any
commercial advertising.

(c) Every such prohibited sign, signal, or marking is hereby declared
to be a public nuisance and any police officer or public authority is
hereby empowered to remove the same or cause it to be removed without
notice.