
The speed limit signs begin changing Monday and new speed limits will be official when the roads are all signed. All the signs will be changed by mid-November, according to the Michigan Department of Transportation.
The following portions of freeway and limited-access freeway are slated to increase to from 70 to 75 mile-per-hour speed limits, while truck speed limits here will go from 60 to 65 miles-per-hour:
- I-75 β 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 β 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 β M-57 to the end of the freeway north of Manton (Kent, Montcalm, Mecosta, Osceola, and Wexford counties)
- I-69 β I-69 Business Route (Saginaw Highway) to Swartz Creek (Clinton, Shiawassee, and Genesee counties)
- I-69 β From the Genesee/Lapeer county line to I-94 (Genesee, Lapeer, and St. Clair counties)
- US-10 β M-115 to I-75 (Clare, Isabella, Midland, and Bay counties)
- US-31 β South Oceana County line to US-10 (Oceana and Mason counties)
The following sections of non-freeway will see increases to 65 mph:
- US-2 β Wakefield to Iron River (Gogebic and Iron counties)
- US-2 β St. Ignace to Rapid River (Mackinac, Schoolcraft, and Delta counties)
- US-23 β East of Cheboygan to east of M-65 (Cheboygan and Presque Isle counties)
- US-45 β North of US-2 to M-26 (Gogebic and Ontonagon counties)
- M-28 β East of Harvey to Christmas (Marquette and Alger counties)
- M-28 β Munising to I-75 (Alger, Schoolcraft, Luce, and Chippewa counties)
- M-28 β Wakefield to US-41 (Gogebic, Ontonagon, Houghton, and Baraga counties)
- M-32 β Atlanta to Alpena (Montmorency and Alpena counties)
- M-33 β Atlanta to Onaway (Montmorency and Presque Isle counties)
- M-37 β Mesick to Wolf Lake (Wexford and Lake counties)
- M-55 β US-31 to Cadillac West (Manistee and Wexford counties)
- M-64 β M-28 to Old M-107 (Ontonagon County)
- M-65 β US-23 to M-32 west junction (Arenac, Iosco, Alcona, and Alpena counties)
- M-65 β M-32 east junction to US-23 (Alpena and Presque Isle counties)
- M-68 β I-75 to US-23 (Cheboygan and Presque Isle counties)
- M-72 β Grayling to Mio (Crawford and Oscoda counties)
- M-72 β Fairview to M-65 north junction (Oscoda and Alcona counties)
- M-72 β M-65 south junction to Harrisville (Alcona County)
- M-77 β US-2 to M-28 (Schoolcraft County)
- M-115 β Benzonia to Mesick (Benzie and Wexford counties)
- M-123 β I-75 to Paradise (Mackinac and Chippewa counties)
- M-231 β M-45 to M-104 (Ottawa County)