Mich. Comp. Laws § 247.293

Sec. 3. Any highway official who shall neglect or refuse to provide suitable barriers and suitable detours or to remove barriers and signs as herein provided, or any person who wilfully enters upon the closed portion of any highway or removes the barriers therefrom, or who removes, obliterates or defaces any sign or mark, or who extinguishes or removes any light placed or maintained hereunder, except by permission of the highway officials in charge, is guilty of a misdemeanor.