Michigan Compiled Laws, Chapter 117. Home Rule Cities § 117.5d

Sec. 5d. 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 city 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. However, a city may prescribe the length of the time for which a passenger locomotive or passenger railroad train may obstruct vehicular traffic.