U.S. Route 127 in Michigan

US Highway 127
US 127 highlighted in red
Route information
Maintained by MDOT
Length	212.168 mi[1] (341.451 km)
Existed	November 11, 1926[2]–present
History	Extended in 2002
Major junctions
South end	US 127 near Waldron
Major intersections	US 223 near Somerset US 12 near Somerset I-94 in Jackson I-96 / I-496 in Lansing I-496 in Lansing I-69 near East Lansing US 10 near Clare
North end	I-75 near Grayling
Location
Country	United States
State	Michigan
Counties	Lenawee, Hillsdale, Jackson, Ingham, Clinton, Gratiot, Isabella, Clare, Roscommon, Crawford
Highway system
United States Numbered Highway System List Special Divided Michigan State Trunkline Highway System Interstate US State Byways
← M-126 → Bus. US 127

US Highway 127 (US 127) is a part of the United States Numbered Highway System that runs from Chattanooga, Tennessee, to the Lower Peninsula of Michigan. In Michigan, it is a state trunkline highway that runs for 212.2 miles (341.5 km), entering from Ohio south of Hudson and ending at a partial interchange with Interstate 75 (I-75) south of Grayling. US 127 is the primary route connecting Lansing and Central Michigan to Northern Michigan and the Mackinac Bridge. From the south side of Jackson northerly, it is mostly a four-lane freeway. A notable exception is a 16-mile (26 km) stretch from north of St. Johns to just south of Ithaca, where the highway is built as an expressway and speed limits are lower. South of Jackson to the state line, the trunkline is a two-lane, undivided highway with access from adjacent properties.

The highway was first designated on November 11, 1926, along a series of existing state highways from Lansing southward toward Toledo. In 1930, the southern end was rerouted south of Somerset in rural northwestern Lenawee County to a course that ran directly south to the Ohio state line; the remainder was renumbered US 223. Starting in the 1950s, the highway was reconfigured to bypass Mason and other communities, converting US 127 into a freeway from Jackson to the Lansing area by the mid-1970s. When the Michigan Department of Transportation (MDOT) successfully petitioned the American Association of State Highway and Transportation Officials (AASHTO) in 1999 to remove US 27 from the state, US 127 was to be extended northward from Lansing to Grayling as the replacement designation. This change was made in 2002, resulting in the current configuration of the highway in Michigan. The United States Congress has designated an additional Interstate Highway, to be part of I-73, that would replace most or all of US 127 through Central and Southern Michigan, but any plans by MDOT to complete this highway were cancelled in 2001.