Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.610

Sec. 610.(1) Local authorities and county road commissions in their respective jurisdictions shall place and maintain the traffic control devices upon highways under their jurisdiction that they consider necessary to indicate and to carry out the provisions of this chapter or local traffic ordinances or to regulate, warn, or guide traffic. All traffic control devices shall conform to the Michigan manual on uniform traffic control devices.

(2) The state transportation department shall withhold from any incorporated village, city, or county that fails to comply with sections 606, 608, 609, 612, and 613,  1 the share of fuel and vehicle tax revenue that would otherwise be due the incorporated village, city, or county under section 10 of 1951 PA 51, MCL 247.660. Notice of failure to comply, and 1 year's time to comply after notice, shall first be given.

(3) A person, firm, or corporation shall not sell or offer for sale to local authorities and local authorities shall not purchase or manufacture any traffic control device that does not conform to the Michigan manual on uniform traffic control devices, except with the permission of the director of the state transportation department.