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 an official traffic-control device , such as a stop sign. Political signs may be displayed to view to all public ways except for the Interstate Highway system. All signs located at interstate interchanges are in violation and will be removed.
Municipal ordinances advocating stricter control take precedence over state law.
Traffic safety should be of the utmost consideration in placement of political signs or posters. For example, signs or posters should not be placed at or near intersections where they could obstruct the view of on-coming traffic to the motorist entering the intersection. Also, signs or posters should not be erected on or in any manner so as to interfere with the effectiveness of traffic control devices. Acceptable display would be those posters or signs affixed to their own stake or post and set in the ground well outside the traveled portion of the highway, or, with the owners consent and permission, attached to a building or dwelling, or displayed on vehicles or in the windows of business establishment, and in other like manner. It is therefore suggested that this information be passed on to them.