Ala. Code § 45-2-180.20: Political Signs on Public Rights-of-Way.

(a) Signs, markers, and advertising, pertaining to political campaigns, on the rights-of-way of state and county controlled highways are prohibited in Baldwin County except those official signs or markers placed thereon by the State Department of Transportation or by Baldwin County or under the authority or either governmental entity. No sign, marker, or political poster may be attached to any official sign or marker placed by the highway department or by the county or on any utility pole or tree on the rights-of-way of a state or county highway.

(b) Any person violating the provisions of this section shall upon conviction be guilty of violating Section 23-1-6.