Mich. Comp. Laws § 67.1a

Sec. 1a. Notwithstanding any other provision of this act, on and after the effective date of a passenger railroad maximum speed limit specified in a final order of the director of the state transportation department, an ordinance of a village prescribing the maximum speed limit of locomotives used in passenger train operations or of passenger railroad trains shall not be enforceable as to a speed limit other than the limit set forth in the order.