No person may, without lawful authority, attempt or actually alter, deface, injure, knock down, remove, or in any manner molest or interfere with any official highway marker, sign, guide board, traffic-control device, interstate highway gate, or any railroad sign or signal, barrier, warning device, or sign erected in connection with highway maintenance or construction activities. A violation of this section is a Class 1 misdemeanor. Any person who violates this section is responsible for the cost of repairing or replacing such markers, signs, signals, barriers, or devices.
SDCL 31-28-23