From MDOT, posted April 26, 2017
In accordance with new state law, the Michigan Department of Transportation (MDOT) and Michigan State Police (MSP) have identified 900 miles of non-freeway state highways for speed limit increases to 5 mph, and 600 miles of freeway for speed limit increases to 75 mph. Select freeway routes will have increased speed limits posted beginning May 1.
MDOT will begin posting new speed limits beginning May 1, starting with three freeway routes:
- I-75 Bay City to US-23 in Mackinaw City (Bay, Arenac, Ogemaw, Roscommon, Crawford, Otsego, Cheboygan, and Emmet counties), and St. Ignace to Sault Ste. Marie (Mackinac and Chippewa counties)
- US-127 – I-69 to the end of the freeway at St. Johns (Clinton County), and the beginning of the freeway at Ithaca to I-75 (Gratiot, Isabella, Clare, Roscommon, and Crawford counties)
- US-131 – M-57 to the end of the freeway north of Manton (Kent, Montcalm, Mecosta, Osceola, and Wexford counties)
Further Details can be found at: