Ala. Code § 23-1-8.1

After September 1, 1979, no state funds shall be expended in this state for purposes of erecting and maintaining signs designating roads, bridges, or buildings in honor or in memory of any individual; provided, however, that the State Department of Transportation may continue to prepare and erect such signs so long as the actual cost of such preparation and maintenance is paid for by private funds or city or county government funds.