Mich. Comp. Laws § 125.51
After the planning commission of any city or village shall have lawfully adopted a master plan for the physical development of the municipality or of 1 or more major sections or divisions thereof, it shall have the power to make or cause to be made and certify to the legislative body of such municipality, from time to time, detailed and precised plats, each showing the exact location of the proposed future outside lines of 1 or more new, extended or widened streets, avenues, places or other public ways, or of 1 or more parks, playgrounds or other public grounds or extensions thereof shown on such adopted master plan. At the time of each such certification to the legislative body, the commission shall transmit an estimate of the time period within which the land acquisitions for public use indicated on the certified plat should be accomplished. The making or certifying of such a plat by the commission shall not in and of itself constitute or be deemed to constitute the opening and establishment of any street or the taking or acceptance of any land for any of the aforesaid purposes.
MCL 125.51