Mich. Comp. Laws § 247.658

Sec. 8. All streets within the corporate limits and under the jurisdiction of each municipality of the state, exclusive of state trunk line highways and county roads, and not included in the major street system of such municipality as finally approved shall be certified to and reviewed and approved or deleted by the state highway commissioner in the same manner as provided in section 6 hereof for the major street system and when finally approved by the state highway commissioner shall constitute and be the local street system of that city or village, which may thereafter be added to or deleted from in the same manner as provided in section 7 of this act for city or village major street systems.