Michigan Avenue (Detroit)
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US Highway 12 (US 12) is an east–west
US Highway The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these hi ...
that runs from
Aberdeen, Washington Aberdeen () is a city in Grays Harbor County, Washington, United States. The population was 17,013 at the 2020 census. The city is the economic center of Grays Harbor County, bordering the cities of Hoquiam and Cosmopolis. Aberdeen is occasi ...
, to
Detroit Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at th ...
, Michigan. In
Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
it runs for between New Buffalo and Detroit as a state trunkline highway and
Pure Michigan Byway A Pure Michigan Byway is the designation for a segment of the State Trunkline Highway System in the US state of Michigan that is a "scenic, recreational, or historic route that is representative of Michigan's natural and cultural heritage." The ...
. On its western end, the highway is mostly a two-lane road that runs through the southern tier of counties roughly parallel to the Indiana state line. It forms part of the Niles Bypass, a four-lane
expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...
south of Niles in the southwestern part of the state, and it runs concurrently with the Interstate 94 (I-94) freeway around the south side of Ypsilanti in the southeastern. In between Coldwater and the
Ann Arbor Anne, alternatively spelled Ann, is a form of the Latin female given name Anna (name), Anna. This in turn is a representation of the Hebrew Hannah (given name), Hannah, which means 'favour' or 'grace'. Related names include Annie (given name), ...
area, the highway angles northeasterly and passes the
Michigan International Speedway Michigan International Speedway (MIS) is a moderate-banked D-shaped speedway located off U.S. Highway 12 on more than approximately south of the village of Brooklyn, in the scenic Irish Hills area of southeastern Michigan. The track is ...
. East of Ypsilanti, US 12 follows a
divided highway A dual carriageway ( BE) or divided highway ( AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are ...
routing on Michigan Avenue into Detroit, where it terminates at an intersection with Cass Avenue. When US 12 was designated in Michigan on November 11, 1926, along with the other original US Highways, it ran along a more northerly course. It originally replaced sections of the original M-11 and M-17 along Michigan Avenue in the state, the route of the much older St. Joseph Trail, a footpath used by Native Americans before European settlement in the area. It entered from Indiana as it does now, but it followed the
Lake Michigan Lake Michigan is one of the five Great Lakes of North America. It is the second-largest of the Great Lakes by volume () and the third-largest by surface area (), after Lake Superior and Lake Huron. To the east, its basin is conjoined with that o ...
shoreline farther north to
Benton Harbor Benton Harbor is a city in Berrien County in the U.S. state of Michigan. It is 46 miles southwest of Kalamazoo and 71 miles southwest of Grand Rapids. According to the 2020 census, its population was 9,103. It is the smaller, by population, of ...
St. Joseph Joseph (; el, Ἰωσήφ, translit=Ioséph) was a 1st-century Jewish man of Nazareth who, according to the canonical Gospels, was married to Mary, the mother of Jesus, and was the legal father of Jesus. The Gospels also name some brothers ...
before turning eastward to run through
Kalamazoo Kalamazoo ( ) is a city in the southwest region of the U.S. state of Michigan. It is the county seat of Kalamazoo County. At the 2010 census, Kalamazoo had a population of 74,262. Kalamazoo is the major city of the Kalamazoo-Portage Metropolit ...
,
Battle Creek Battle Creek is a city in the U.S. state of Michigan, in northwest Calhoun County, at the confluence of the Kalamazoo and Battle Creek rivers. It is the principal city of the Battle Creek, Michigan Metropolitan Statistical Area (MSA), which encom ...
and
Jackson Jackson may refer to: People and fictional characters * Jackson (name), including a list of people and fictional characters with the surname or given name Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Q ...
. In the Ann Arbor area, it followed a more northerly path into Detroit before terminating downtown. In the 1940s and 1950s, sections of the highway were converted into expressways and
freeways A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...
. Starting in 1959, these freeway segments were renumbered as part of I-94, and in January 1962, US 12 was shifted to replace US Highway 112 (US 112). That highway, when it was designated in 1926 replaced the original M-23 along the Chicago Road, which was the route of the older
Sauk Trail The Sauk Trail was originally a Native American trail running through what are present-day Illinois, Indiana and Michigan in the United States. From west to east, the trail ran from Rock Island on the Mississippi River to the Illinois River near ...
. Later, US 112 replaced the first M-151 when the former was extended to New Buffalo in the mid-1930s. Since 1962, the highway has remained relatively unchanged aside from minor truncations in the city of Detroit. US 112 previously had two business loops, both of which were renumbered Business US 12 (Bus. US 12) in 1962. In 2010, the Niles business loop was decommissioned, but the one in Ypsilanti remains. One section of the former US 112 was renumbered US 112S for a few years in the 1930s.


Route description

Between the state line near
Michiana Michiana is a region in northern Indiana and southwestern Michigan centered on the city of South Bend, Indiana. The Chamber of Commerce of St. Joseph County, Indiana defines Michiana as St. Joseph County and "counties that contribute at least ...
and the interchange with I-94 near New Buffalo, US 12 forms a portion of the
Lake Michigan Circle Tour The Great Lakes Circle Tour is a designated scenic road system connecting all of the Great Lakes and the St. Lawrence River. It consists of routes for circumnavigating the lakes, either individually or collectively. It was designated by the Grea ...
(LMCT). The full length of the highway in the state is also a Pure Michigan Historic Byway. Outside of the various cities, most of US 12 is a rural, two-lane state highway. One section runs concurrently with I-94 south of Ypsilanti. From there eastward, US 12 is a
divided highway A dual carriageway ( BE) or divided highway ( AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are ...
and then a
boulevard A boulevard is a type of broad avenue planted with rows of trees, or in parts of North America, any urban highway. Boulevards were originally circumferential roads following the line of former city walls. In American usage, boulevards may ...
into the
Detroit Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at th ...
area. The entire length of the highway east of Coldwater is listed on the National Highway System, a network of roads important to the US's economy, defense, and mobility.


Southwest Michigan

US 12 enters the state of Michigan southwest of New Buffalo near the town of Michiana. The highway runs a bit inland and parallel to the
Lake Michigan Lake Michigan is one of the five Great Lakes of North America. It is the second-largest of the Great Lakes by volume () and the third-largest by surface area (), after Lake Superior and Lake Huron. To the east, its basin is conjoined with that o ...
shore on Red Arrow Highway past the community of Grand Beach before turning eastward away from the lake on the north side of New Buffalo. US 12 intersects I-94 less than a mile east of this turn and continues due east along Pulaski Highway through rural farmland. The highway is the main east–west street as it crosses through Three Oaks in southern Berrien County. East of Galien, the highway dips southward around Dayton Lake before passing south of
Buchanan Buchanan may refer to: People * Buchanan (surname) Places Africa * Buchanan, Liberia, a large coastal town Antarctica * Buchanan Point, Laurie Island Australia * Buchanan, New South Wales * Buchanan, Northern Territory, a locality * Buchanan ...
. The highway continues eastward, intersecting US 31 ( St. Joseph Valley Parkway) near Niles. East of that freeway, US 12 expands into an
expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...
as the Niles Bypass. This bypass intersects M-139, crosses the St. Joseph River and intersects
M-51 M51 or M-51 may refer to: * M-51 (Michigan highway), a state highway in Michigan * M51 highway (Russia) * M51 (Cape Town), a Metropolitan Route in Cape Town, South Africa * M51 Skysweeper, an anti-aircraft gun * M51 MACI mine * M51 SLBM, a French ...
on the south side of Niles. US 12 turns northeasterly along the bypass east of downtown and then departs to the southeast at an interchange with Main Street and M-60 just across the county line with Cass County. Continuing through southern Cass County, US 12 runs roughly parallel to the state line. It turns northeasterly to run into Edwardsburg, where it intersects M-62. The highway turns southeasterly and runs to the south of Eagle Lake before entering the community of Adamsville. The highway continues on this southeasterly course until it intersects the former M-205 and M-217 (Michiana Parkway) near
Union Union commonly refers to: * Trade union, an organization of workers * Union (set theory), in mathematics, a fundamental operation on sets Union may also refer to: Arts and entertainment Music * Union (band), an American rock group ** ''Un ...
and turns to the northeast. US 12 intersects the southern end of M-40 before crossing into St. Joseph County at the eastern crossing of the St. Joseph River. On the eastern side of the river, US 12 enters Mottville and intersects M-103. The highway continues as Chicago Road through farmland and intersects US 131 near White Pigeon. It runs along the south side of Klinger Lake and continues to a junction with M-66 in Sturgis; the two highways run concurrently for about eight blocks through town. East of Sturgis, US 12 turns northeasterly into Branch County. Still named Chicago Road, it passes through Bronson and past
Batavia Batavia may refer to: Historical places * Batavia (region), a land inhabited by the Batavian people during the Roman Empire, today part of the Netherlands * Batavia, Dutch East Indies, present-day Jakarta, the former capital of the Dutch East In ...
. Northeast of Batavia, US 12 intersects the eastern end of
M-86 M86 or M-86 may refer to: * HMAS Diamantina (M 86), Huon-class minehunter in the Royal Australian Navy * INS Malpe (M86), Indian Naval minesweeper ship * Lenticular Galaxy M86 or Messier 86, a lenticular galaxy in the Virgo Cluster * M86 expresswa ...
near
Branch County Memorial Airport Branch County Memorial Airport is a county-owned, public-use airport located three nautical miles (6 km) west of the central business district of Coldwater, Michigan, Coldwater, a city in Branch County, Michigan, Branch County, Michigan, Un ...
. The airport is on the western edge of Coldwater, and after crossing the Coldwater River between Cemetery and South lakes, the highway runs through residential neighborhoods and into downtown. East of Division Street, Business Loop I-69 (BL I-69) follows US 12 through downtown and out to an interchange with
I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of 10 unconnected segments with an original continuous segment from Indianapolis, Indiana, northeast to the Canadian border in Port Huron, Michigan, at ...
on the east side of Coldwater. The highway continues past retail businesses and parallel to the Sauk River. US 12 passes through the town of Quincy before crossing into
Hillsdale County Hillsdale County is a county located in the U.S. state of Michigan. As of the 2020 Census, the population was 45,746. The county seat is Hillsdale. Hillsdale County is the only county in Michigan to border both Indiana and Ohio. Due to an a ...
.


Southeast Michigan

East of the Hillsdale County line, US 12 runs easterly into
Allen Allen, Allen's or Allens may refer to: Buildings * Allen Arena, an indoor arena at Lipscomb University in Nashville, Tennessee * Allen Center, a skyscraper complex in downtown Houston, Texas * Allen Fieldhouse, an indoor sports arena on the Univer ...
, where it intersects M-49. The highway continues northeastward through farmland to Jonesville, where it runs concurrently with M-99 through downtown and across a different St. Joseph River. The trunkline continues northeasterly through northern Hillsdale County, crossing the South Branch of the
Kalamazoo River The Kalamazoo River is a river in the U.S. state of Michigan. The river is long from the junction of its North and South branches to its mouth at Lake Michigan, with a total length extending to when one includes the South Branch.U.S. Geologica ...
in
Moscow Moscow ( , US chiefly ; rus, links=no, Москва, r=Moskva, p=mɐskˈva, a=Москва.ogg) is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at 13.0 million ...
. US 12 runs along the south side of Lake LeAnn in Somerset Center in the northeastern corner of the county. East of
Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...
, the highway crosses into northern
Lenawee County Lenawee County ( ') is a county located in the U.S. state of Michigan. As of the 2020 United States Census, the population was 99,423. The county seat is Adrian. The county was created in 1822, from territory partitioned from Monroe County. Its g ...
. Immediately east of the Lenawee County line, US 12 intersects US 127 in the
Irish Hills Irish Hills is an area of land located roughly in southeastern Jackson County and northwest Lenawee County in Southeast Michigan. It was named after the numerous Irish immigrants who settled there from 1830 until 1850. Today it is known thro ...
region. South of
Brooklyn Brooklyn () is a borough of New York City, coextensive with Kings County, in the U.S. state of New York. Kings County is the most populous county in the State of New York, and the second-most densely populated county in the United States, be ...
in
Cambridge Junction Cambridge Junction is a live music and arts venue in Cambridge, England. The principal venue was opened to the south of the Cambridge railway station, railway station and on the site of the city's former Cattle Market in 1990, as "The Junction". ...
, it passes the
Michigan International Speedway Michigan International Speedway (MIS) is a moderate-banked D-shaped speedway located off U.S. Highway 12 on more than approximately south of the village of Brooklyn, in the scenic Irish Hills area of southeastern Michigan. The track is ...
and crosses the
River Raisin The River Raisin is a river in southeastern Michigan, United States, that flows through Ice age, glacial sediments into Lake Erie. The area today is an agriculture, agricultural and Industrial sector, industrial center of Michigan. The river flo ...
next to a junction with M-50. East of the racetrack, the highway meanders through an area dotted by several smaller lakes until it intersects M-124 at Walter J. Hayes State Park. Continuing as Michigan Avenue, US 12 angles northeasterly from the park until it hits the Lenawee– Washtenaw county line. The highway follows the line for several miles before reentering Lenawee County. It continues through an intersection with M-52 and into
Clinton Clinton is an English toponymic surname, indicating one's ancestors came from English places called Glympton or Glinton.Hanks, P. & Hodges, F. ''A Dictionary of Surnames''. Oxford University Press, 1988 Clinton has frequently been used as a given ...
before turning northeasterly and fully crossing into Washtenaw County. In Washtenaw County, US 12 passes through Benton in a rural southern section of the county. At
Saline Saline may refer to: * Saline (medicine), a liquid with salt content to match the human body * Saline water, non-medicinal salt water * Saline, a historical term (especially US) for a salt works or saltern Places * Saline, Calvados, a commune in ...
, the highway enters the suburban edge of the
Ann Arbor Anne, alternatively spelled Ann, is a form of the Latin female given name Anna (name), Anna. This in turn is a representation of the Hebrew Hannah (given name), Hannah, which means 'favour' or 'grace'. Related names include Annie (given name), ...
Ypsilanti metro area. US 12 follows Michigan Avenue northeasterly through Saline and across an interchange with US 23 before intersecting I-94 in
Pittsfield Pittsfield is the largest city and the county seat of Berkshire County, Massachusetts, United States. It is the principal city of the Pittsfield, Massachusetts Metropolitan Statistical Area which encompasses all of Berkshire County. Pittsfield ...
and Ypsilanti townships. US 12 leaves Michigan Avenue to follow I-94 at that freeway's exit 181; Michigan Avenue continues into downtown Ypsilanti as a city street. I-94/US 12 skirts around the south side of the city and intersects the western end of Business US 12 (Bus. US 12) at Huron Street south of downtown. The freeway continues around the south side of the city and rounds the north end of Ford Lake. It is bounded by residential neighborhoods, and it crosses the
Huron River The Huron River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed November 7, 2011 river in southeastern Michigan, rising out of the Huron Swamp in Springfield Township in north ...
on the eastern side of Ypsilanti. Near the
Willow Run Willow Run, also known as Air Force Plant 31, was a manufacturing complex in Michigan, United States, located between Ypsilanti Township and Belleville, built by the Ford Motor Company to manufacture aircraft, especially the B-24 Liberator heav ...
industrial complex and airport, US 12 separates from I-94 and turns northeasterly along an
expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...
on the north side of the airport. There are three interchanges, including one for the eastern end of M-17 before US 12 crosses into Wayne County and intersects the eastern end of Bus. US 12.


East into Detroit

Once US 12 intersects the eastern end of its business loop, it returns to Michigan Avenue for the remainder of its routing in the state. The roadway is a
boulevard A boulevard is a type of broad avenue planted with rows of trees, or in parts of North America, any urban highway. Boulevards were originally circumferential roads following the line of former city walls. In American usage, boulevards may ...
in this area, a street divided by a central
median In statistics and probability theory, the median is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as "the middle" value. The basic fe ...
. It runs through Canton Township and parallel to the Lower River Rouge. US 12 intersects
I-275 Interstate 275 (I-275) may refer to: *Interstate 275 (Florida), a loop through Tampa, St. Petersburg, and Bradenton in Florida *Interstate 275 (Michigan), a western bypass of Detroit, Michigan *Interstate 275 (Ohio–Indiana–Kentucky), a full belt ...
on the eastern side of the township before crossing into Wayne. The highway is bounded by a mix of industrial and commercial properties in suburban
Metro Detroit The Detroit metropolitan area, often referred to as Metro Detroit, is a major metropolitan area in the U.S. State of Michigan, consisting of the city of Detroit and its surrounding area. There are varied definitions of the area, including the ...
. In downtown Wayne, the two sides of Michigan Avenue split apart, surrounding the central business district of the city and separated by two to three city blocks. East of this split, Michigan Avenue crosses a section of
Westland Westland or Westlands may refer to: Places *Westlands, an affluent neighbourhood in the city of Nairobi, Kenya * Westlands, Staffordshire, a suburban area and ward in Newcastle-under-Lyme *Westland, a peninsula of the Shetland Mainland near Vaila, ...
before entering Inkster. In Dearborn, US 12 intersects US 24 (Telegraph Road) at an interchange on the western side of the city, and M-39 (Southfield Freeway) on the eastern side near the River Rouge crossing and
Greenfield Village The Henry Ford (also known as the Henry Ford Museum of American Innovation and Greenfield Village, and as the Edison Institute) is a history museum complex in the Detroit suburb of Dearborn, Michigan, United States. The museum collection contains ...
. On the Dearborn–Detroit city border, US 12 pass through a complex interchange with I-94 (Edsel Ford Freeway) and M-153 (Ford Road/Wyoming Avenue). Michigan Avenue continues northeasterly parallel to I-94 for a short distance before it turns due east. Once it makes the direction change, it forms the 0 Mile of Detroit's Mile Road System. US 12 continues through residential areas on Detroit's West Side, passing through the interchange that connects
I-75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from St ...
with
I-96 Interstate 96 (I-96) is an east–west Interstate Highway that runs for approximately entirely within the Lower Peninsula of the US state of Michigan. The western terminus is at an interchange with US Highway 31 (US 31) and Bus ...
's eastern terminus near the
Ambassador Bridge The Ambassador Bridge is a tolled international suspension bridge across the Detroit River that connects Detroit, Michigan, United States, with Windsor, Ontario, Canada. Opened in 1929, it is the busiest international border crossing in North ...
. The highway runs through Corktown and beside the site of the former Tiger Stadium at the corner of Michigan and Trumbull. East of the former stadium, US 12 crosses
M-10 M10, M-10 or M 10 may refer to: Science and technology * Messier 10, a globular cluster in the constellation Ophiuchus * M10, a Garmin Nüvifone smartphone * Samsung Galaxy M10, a smartphone * M10 (rocket engine), a rocket engine Transportation ...
(Lodge Freeway) near the
MGM Grand Detroit The MGM Grand Detroit is one of three casino resort hotels in Detroit, Michigan, and one of four in the Detroit–Windsor area. It is owned by Vici Properties and operated by MGM Resorts International. The casino opened in its temporary location ...
casino. East of M-10, Michigan Avenue enters
Downtown Detroit Downtown Detroit is the central business district and a residential area of the city of Detroit, Michigan, United States. Locally, downtown tends to refer to the 1.4 square mile region bordered by M-10 (Lodge Freeway) to the west, Interstate 75 ( ...
. At the corner of Michigan and Cass, US 12 ends while Michigan Avenue continues several blocks further to terminate at
Campus Martius Park Campus Martius Park ( ') is a re-established park in Downtown Detroit, Michigan. After the fire of 1805, Campus Martius (from the Latin for ''Field of Mars'', where Roman heroes walked) was the focal point of Judge Augustus Woodward's plans t ...
at
Woodward Avenue A woodward is a Game warden, warden of a wood. Woodward may also refer to: Places ;United States * Woodward, Iowa * Woodward, Oklahoma * Woodward, Pennsylvania, a census-designated place * Woodward Avenue, a street in Tallahassee, Florida, which b ...
.


History


Before 1926

The first major overland transportation corridors in the future state of Michigan were the
Indian Indian or Indians may refer to: Peoples South Asia * Indian people, people of Indian nationality, or people who have an Indian ancestor ** Non-resident Indian, a citizen of India who has temporarily emigrated to another country * South Asia ...
trails. Two of these trails are relevant to US 12. The St. Joseph Trail ran between the
Benton Harbor Benton Harbor is a city in Berrien County in the U.S. state of Michigan. It is 46 miles southwest of Kalamazoo and 71 miles southwest of Grand Rapids. According to the 2020 census, its population was 9,103. It is the smaller, by population, of ...
St. Joseph Joseph (; el, Ἰωσήφ, translit=Ioséph) was a 1st-century Jewish man of Nazareth who, according to the canonical Gospels, was married to Mary, the mother of Jesus, and was the legal father of Jesus. The Gospels also name some brothers ...
area and
Detroit Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at th ...
by way of what is now
Kalamazoo Kalamazoo ( ) is a city in the southwest region of the U.S. state of Michigan. It is the county seat of Kalamazoo County. At the 2010 census, Kalamazoo had a population of 74,262. Kalamazoo is the major city of the Kalamazoo-Portage Metropolit ...
,
Battle Creek Battle Creek is a city in the U.S. state of Michigan, in northwest Calhoun County, at the confluence of the Kalamazoo and Battle Creek rivers. It is the principal city of the Battle Creek, Michigan Metropolitan Statistical Area (MSA), which encom ...
,
Jackson Jackson may refer to: People and fictional characters * Jackson (name), including a list of people and fictional characters with the surname or given name Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Q ...
and
Ann Arbor Anne, alternatively spelled Ann, is a form of the Latin female given name Anna (name), Anna. This in turn is a representation of the Hebrew Hannah (given name), Hannah, which means 'favour' or 'grace'. Related names include Annie (given name), ...
. The second, the
Sauk Trail The Sauk Trail was originally a Native American trail running through what are present-day Illinois, Indiana and Michigan in the United States. From west to east, the trail ran from Rock Island on the Mississippi River to the Illinois River near ...
, ran further south through what is now Niles, and Coldwater to the Ann Arbor area. The Town of Detroit created
rights-of-way Right of way is the legal right, established by grant from a landowner or long usage (i.e. by prescription), to pass along a specific route through property belonging to another. A similar ''right of access'' also exists on land held by a gov ...
for the principal streets of the city in 1805, including Michigan Avenue. This street plan was devised by
Augustus Woodward Augustus Brevoort Woodward (born Elias Brevoort Woodward; November 1774 – June 12, 1827) was the first Chief Justice of the Michigan Territory. In that position, he played a prominent role in the reconstruction of Detroit following a d ...
and others following a devastating fire in Detroit, with a mandate from the territorial governor to improve on the previous plan. The wide width of the avenues was an emulation of the street plan for
Washington, DC ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan ...
, and intended to make Detroit the "Paris of the West". The southern of these two Indian trails later became the Chicago Road. Father
Gabriel Richard Gabriel Richard (pronounced rish-ARD) October 15, 1767 – September 13, 1832, was a French Roman Catholic priest who ministered to the French Catholics in the parish of Sainte Anne de Détroit, as well as Protestants and Native Americans liv ...
, the first priest to serve in the U.S. House of Representatives, petitioned Congress to fund a highway between Detroit and
Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...
in March 1824. A year later, the road was established in federal law, and it was surveyed by the end of 1825. Construction started in 1829, and the road was finished across Michigan in 1833.. The northern Indian trail was established as an unnamed territorial road (later called
Territorial Road A territory is an area of land, sea, or space, particularly belonging or connected to a country, person, or animal. In international politics, a territory is usually either the total area from which a state may extract power resources or an ...
) in 1829.. The State Trunkline Highway System was created on May 13, 1913, by an act of the
Michigan Legislature The Michigan Legislature is the legislature of the U.S. state of Michigan. It is organized as a bicameral body composed of an upper chamber, the Senate, and a lower chamber, the House of Representatives. Article IV of the Michigan Constitution, ...
; at the time, two of the system's divisions corresponded to the original US 12. Division 5 had a segment from New Buffalo to Benton Harbor and Watervliet while Division 6 connected Watervliet through Kalamazoo, Jackson and Ann Arbor to Detroit. No divisions corresponded to the future US 112. In 1919, the
Michigan State Highway Department The Michigan Department of Transportation (MDOT) is a constitutional government principal department of the US state of Michigan. The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate ...
(MSHD) signposted the highway system for the first time, and the future US 12 corridor was assigned two numbers. From the state line north through Benton Harbor to Watervliet, it carried the original M-11 designation, and from Watervliet eastward it was the original M-17. From Dearborn into Detroit, the original
M-10 M10, M-10 or M 10 may refer to: Science and technology * Messier 10, a globular cluster in the constellation Ophiuchus * M10, a Garmin Nüvifone smartphone * Samsung Galaxy M10, a smartphone * M10 (rocket engine), a rocket engine Transportation ...
ran concurrently along M-17. The future US 112 along the Chicago Road had two different numbers in the original highway plan. Between New Buffalo and Niles, the highway was numbered M-60, and from
Union Union commonly refers to: * Trade union, an organization of workers * Union (set theory), in mathematics, a fundamental operation on sets Union may also refer to: Arts and entertainment Music * Union (band), an American rock group ** ''Un ...
to Ypsilanti, it was M-23. East of Ypsilanti, the corridor was part of M-17 and M-10. In November 1926, these two highway corridors were renumbered as part of the
United States Numbered Highway System The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these hi ...
.


Original US Highway: 1926–62

On November 11, 1926, the
United States Numbered Highway System The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these hi ...
was approved by the
American Association of State Highway Officials The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United St ...
(AASHO), and US 12 was the designation assigned to a highway running northeasterly from Indiana near Lake Michigan to Benton Harbor–St. Joseph and turning east to Detroit through Kalamazoo, Jackson, and Ann Arbor. This designation replaced sections of the original M-11 and M-17 through the southern part of the state. By the end of the next year, the MSHD rerouted the highway between
Sawyer *A sawyer (occupation) is someone who saws wood. *Sawyer, a fallen tree stuck on the bottom of a river, where it constitutes a danger to boating. Places in the United States Communities *Sawyer, Kansas *Sawyer, Kentucky * Sawyer, Michigan * Saw ...
and Stevensville, and Downtown Stevensville was bypassed in 1928. Additional work to fully bypass Stevensville was finished in 1929. In 1931, the original routing of US 12 along a section of Michigan Avenue between Kalamazoo and Comstock was renumbered US 12A, and a new routing along King Highway south of the original opened. By 1936, another US 12A debuted in Battle Creek, and by the end of the year, the main highway was rerouted between Augusta and Battle Creek. Another new segment of highway opened that same year east of Jackson, bypassing
Leoni Leoni is an Italian surname, literally meaning "lions". Notable people with this surname include: People *Pier Leoni (died 1128), son of the Jewish convert Leo de Benedicto and founder of the Roman family of the Pierleoni * Jacob Jehudah Leoni ...
and Grass Lake to the north. This new bypass was extended eastward from
Sylvan Sylvan or Sylvans (from the Latin ''silva'': "forest, woods") may refer to: Places United States * Sylvan, Illinois, a former settlement * Sylvan, Wisconsin, a town ** Sylvan (community), Wisconsin, an unincorporated area in the town * Sylvan ...
to bypass
Chelsea Chelsea or Chelsey may refer to: Places Australia * Chelsea, Victoria Canada * Chelsea, Nova Scotia * Chelsea, Quebec United Kingdom * Chelsea, London, an area of London, bounded to the south by the River Thames ** Chelsea (UK Parliament consti ...
to the south the following year, filling a gap in "super highway"Michigan State Highway Department maps of the time defined a "super highway" as one with "three lanes and over" on the map key. segments between Jackson and Ann Arbor. The last routing change in the 1930s was the opening of Stadium Drive in Kalamazoo, after which US 12 was rerouted to follow it west of downtown. In 1940, a southern bypass of Battle Creek opened along Columbia Avenue, and the former routing through downtown on Michigan Avenue became a Business US 12 (Bus. US 12). In late 1951 or early 1952, a northerly bypass of Jackson opened, and the former route through downtown on Michigan Avenue became another Bus. US 12. By the next year, the western half of the Jackson bypass opened, including a bypass of
Parma Parma (; egl, Pärma, ) is a city in the northern Italian region of Emilia-Romagna known for its architecture, Giuseppe Verdi, music, art, prosciutto (ham), Parmigiano-Reggiano, cheese and surrounding countryside. With a population of 198,292 ...
. In 1954, a new bypass of Kalamazoo and Galesburg opened; US 12 was rerouted to follow the new highway while M-96 replaced part of the old route and the US 12A in the area. In 1956, several changes were made to US 12's routing. A southern bypass of Ann Arbor and Ypsilanti was converted to a freeway. US 12 was rerouted to follow the bypass, supplanting the M-17 and Bypass US 112 designations used previously on the bypass. US 112 was also rerouted, and it ran concurrently with US 12 along the bypass. The former route of US 12 along Plymouth Road from Ann Arbor east to Detroit was renumbered
M-14 M14, M-14, or M.14 most often refers to: * M14 rifle, an American military rifle ** Mk 14 Enhanced Battle Rifle, an American designated marksman rifle based on the M14 M14, M-14, or M.14 may also refer to: Roads * Highway M14 (Ukraine) * M-14 (Mic ...
, and the M-112 designation on the Willow Run and Detroit Industrial expressways was replaced by US 12. At the same time as these changes were made, the Jackson bypass was upgraded to a full freeway. By the middle of 1958, the Kalamazoo bypass was converted to a full freeway. Previously delayed so that the designations could be finalized, the MSHD started numbering its Interstate Highways in 1959, adding I-94 to the sections of US 12 freeway. Later that year, additional segments of I-94/US 12 were opened, starting with a section from
Hartford Hartford is the capital city of the U.S. state of Connecticut. It was the seat of Hartford County until Connecticut disbanded county government in 1960. It is the core city in the Greater Hartford metropolitan area. Census estimates since the ...
to Coloma, then another from Paw Paw to Kalamazoo which connected with a segment between Galesburg to Battle Creek. The overall section from Paw Paw to Battle Creek was dedicated on December 7, 1959. By the middle of 1960, US 12 followed the I-94 freeway from Coloma to Watervliet and from Paw Paw to the east side of Jackson. It was also routed along the freeway from the west side of Ann Arbor into Detroit, where it followed the southern end of the Lodge Freeway. By the middle of 1961, the Watervliet–Paw Paw and Jackson–Ann Arbor freeway gaps were completed, and the freeway was extended westward to Stevensville. By the end of the year, I-94/US 12 extended all the way to New Buffalo. In January 1962, the state made the biggest rerouting change of all to US 12: the designation was removed from the I-94 freeway from New Buffalo to Detroit and shifted to completely replace US 112.


US Highway 112: 1926–62

In 1925, US 112 was originally proposed to run from Oshkosh to
Fremont, Wisconsin Fremont is a village in Waupaca County, Wisconsin, United States. It is surrounded by Town of Fremont. The population was 679 at the 2010 census. Fremont has been referred to as the "White Bass Capital of the World." History This area is of ...
, on what later became
U.S. Route 110 State Trunk Highway 110 (often called Highway 110, STH-110 or WIS 110) is a state highway in the US state of Wisconsin. It runs north–south in central Wisconsin from Fremont to Marion. Its southern terminus is at US Highway 10 (US 10) and ...
. When it was initially designated in November 1926, US 112 made a sharp turn to the southwest to connect to US 20 in
Elkhart, Indiana Elkhart ( ) is a city in Elkhart County, Indiana, United States. The city is located east of South Bend, Indiana, east of Chicago, Illinois, and north of Indianapolis, Indiana. Elkhart has the larger population of the two principal cities of th ...
. In 1931, a new trunkline highway was designated between M-60 at Niles and US 112 at Union. This highway was numbered M-151. In 1933, the section of US 112 from Union to Elkhart was renumbered US 112S. M-151 and US 112S each lasted until 1935 when US 112 was extended to replace M-151. US 112 was also extended to run concurrently with M-60 to New Buffalo, and US 112S was renumbered M-205. In 1936, the section of US 112 along Michigan Avenue east of Ypsilanti was expanded into a "super highway". In 1955, a realignment of US 127 in southern Jackson County removed a short concurrency with US 112 from Somerset Center in
Hillsdale County Hillsdale County is a county located in the U.S. state of Michigan. As of the 2020 Census, the population was 45,746. The county seat is Hillsdale. Hillsdale County is the only county in Michigan to border both Indiana and Ohio. Due to an a ...
and the current intersection in northwestern
Lenawee County Lenawee County ( ') is a county located in the U.S. state of Michigan. As of the 2020 United States Census, the population was 99,423. The county seat is Adrian. The county was created in 1822, from territory partitioned from Monroe County. Its g ...
. On December 1, 1956, the highway department opened the first of a new four-lane divided highway around the south side of Niles; the final of the bypass opened early the next year. Consequently, they converted the former route through town back to US 112/M-60 into a business loop numbered Bus. US 112. At the end of the decade, another highway concurrency was removed when US 131 was realigned to run directly south of US 112 to the state line instead of running concurrently along US 112 between Mottville and White Pigeon. In January 1962, the US 112 designation was eliminated when US 12 was shifted off the I-94 freeway to replace US 112. The state's rationale for the removal of the US 112 designation was the long-standing AASHO recommendation against US Highway designations extant in only one state.


After 1962

After US 12 replaced US 112, the Bus. US 12 routes were renumbered as Business Loop I-94, and the two Bus. US 112s were renumbered to Bus. US 12. In 1966, the state truncated M-60 and removed it as a concurrent designation along US 12 between New Buffalo and Niles. In October 2000, the state proposed changing jurisdiction of several highways near
Campus Martius Park Campus Martius Park ( ') is a re-established park in Downtown Detroit, Michigan. After the fire of 1805, Campus Martius (from the Latin for ''Field of Mars'', where Roman heroes walked) was the focal point of Judge Augustus Woodward's plans t ...
in Detroit, and US 12 was shortened by four city blocks the next year to end along Michigan Avenue at Griswold Street. This would be shortened again in 2005 to Michigan Avenue and Cass Avenue. In April 2017, MDOT announced the reconstruction of US 12 east of Ypsilanti, which would reduce the route from a boulevard to a singular road along the existing eastbound lanes. This project would also eliminate an interchange with Wiard Road and allow the adjacent
American Center for Mobility The American Center for Mobility (ACM) is a vehicular automation research center and federally designated autonomous vehicle, automated vehicle proving ground located in Ypsilanti Charter Township, Michigan, Ypsilanti Township, Michigan. Histor ...
to use the westbound lanes as part of a facility to test automated vehicles. The project was projected to be completed that November.


Memorial highway and byway names

The roads that have carried US 12 in Michigan have been given a number of memorial highway names. In 1922, after the publication of '' Main Street'' by
Sinclair Lewis Harry Sinclair Lewis (February 7, 1885 – January 10, 1951) was an American writer and playwright. In 1930, he became the first writer from the United States (and the first from the Americas) to receive the Nobel Prize in Literature, which was ...
that street name took on a pejorative connotation. The newspaper in Jackson advocated that the main road from Detroit to Chicago which formed the main street through many communities in southern Michigan should be given a new name. It was already labeled the Michigan–Detroit–Chicago Highway on travel maps of the time, so the paper suggested that the roadway should be renamed to create the longest street in the country. Both Chicago and Detroit had streets named Michigan Avenue, so that is what the newspaper suggested for a new name.
Albion Albion is an alternative name for Great Britain. The oldest attestation of the toponym comes from the Greek language. It is sometimes used poetically and generally to refer to the island, but is less common than 'Britain' today. The name for Scot ...
was the first community to change the name of its street followed by
Jackson Jackson may refer to: People and fictional characters * Jackson (name), including a list of people and fictional characters with the surname or given name Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Q ...
and
Marshall Marshall may refer to: Places Australia * Marshall, Victoria, a suburb of Geelong, Victoria Canada * Marshall, Saskatchewan * The Marshall, a mountain in British Columbia Liberia * Marshall, Liberia Marshall Islands * Marshall Islands, an i ...
in 1924,
Battle Creek Battle Creek is a city in the U.S. state of Michigan, in northwest Calhoun County, at the confluence of the Kalamazoo and Battle Creek rivers. It is the principal city of the Battle Creek, Michigan Metropolitan Statistical Area (MSA), which encom ...
in 1928 and
Kalamazoo Kalamazoo ( ) is a city in the southwest region of the U.S. state of Michigan. It is the county seat of Kalamazoo County. At the 2010 census, Kalamazoo had a population of 74,262. Kalamazoo is the major city of the Kalamazoo-Portage Metropolit ...
in 1929. In 1952, US 12 was dedicated to the 32nd Infantry Division. The division used a red arrow as its insignia to symbolize how they pierced the German
Hindenburg Line The Hindenburg Line (German: , Siegfried Position) was a German defensive position built during the winter of 1916–1917 on the Western Front during the First World War. The line ran from Arras to Laffaux, near Soissons on the Aisne. In 191 ...
during World War I and Japanese defenses during World War II. The soldiers who composed the division were drawn from the Michigan and Wisconsin National Guards. After other proposals failed, US 12 was named the ''Red Arrow Highway'' on August 30, 1952, and dedicated on March 22, 1953. Jurisdiction of most of the roadways that composed US 12 at that time has passed to local governments as I-94 was built, but the highway still bears that name in Berrien County and Van Buren County. Count
Casimir Pulaski Kazimierz Michał Władysław Wiktor Pułaski of the Ślepowron coat of arms (; ''Casimir Pulaski'' ; March 4 or March 6, 1745 Makarewicz, 1998 October 11, 1779) was a Polish nobleman, soldier, and military commander who has been called, tog ...
was a Polish-born noble and soldier who fought on the side of the Americans during the Revolutionary War. He was appointed a brigadier general on the recommendations of
George Washington George Washington (February 22, 1732, 1799) was an American military officer, statesman, and Founding Father who served as the first president of the United States from 1789 to 1797. Appointed by the Continental Congress as commander of th ...
and later became known as the "Father of the American Cavalry". He was severely wounded during the
siege of Savannah The siege of Savannah or the Second Battle of Savannah was an encounter of the American Revolutionary War (1775–1783) in 1779. The year before, the city of Savannah, Georgia, had been captured by a British expeditionary corps under Lieutenan ...
and died while being treated on the brigantine ''Wasp''. The route of US 112 was designated the Pulaski Memorial Highway by Public Act 11 of 1953 and formally dedicated in Detroit on October 4, 1953. The segment of what is now US 12 in Berrien County still bears this name. US 12 has also been designated as the Iron Brigade Memorial Highway, a designation which it also has in Indiana, Illinois and Wisconsin. The name honors the 24th Michigan Infantry Regiment, part of the Iron Brigade from the
American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states th ...
. The regiment lost more troops than any other on the Union side during the war and provided the military escort for
Abraham Lincoln Abraham Lincoln ( ; February 12, 1809 – April 15, 1865) was an American lawyer, politician, and statesman who served as the 16th president of the United States from 1861 until his assassination in 1865. Lincoln led the nation thro ...
's funeral in
Springfield, Illinois Springfield is the capital of the U.S. state of Illinois and the county seat and largest city of Sangamon County. The city's population was 114,394 at the 2020 census, which makes it the state's seventh most-populous city, the second largest o ...
. The unit traveled along the Chicago Road to join the war effort. The highway was dedicated in twin ceremonies in New Buffalo on October 9, 1994, and in Detroit on November 11, 1995, to the Iron Brigade. In 1986, the
Michigan Department of Transportation The Michigan Department of Transportation (MDOT) is a constitutional government principal department of the US state of Michigan. The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate ...
consulted with its counterparts in Wisconsin (
WisDOT The Wisconsin Department of Transportation (WisDOT) is a governmental agency of the U.S. state of Wisconsin responsible for planning, building and maintaining the :State highways in Wisconsin, state's highways. It is also responsible for plannin ...
), Minnesota (
Mn/DOT The Minnesota Department of Transportation (MnDOT, ) oversees transportation by all modes including land, water, air, rail, walking and bicycling in the U.S. state of Minnesota. The cabinet-level agency is responsible for maintaining the state ...
) and Ontario (
Ministry of Transportation of Ontario The Ministry of Transportation (MTO) is the provincial ministry of the Government of Ontario that is responsible for transport infrastructure and related law in Ontario. The ministry traces its roots back over a century to the 1890s, when the pro ...
, MTO) about the formation of a circle tour around
Lake Superior Lake Superior in central North America is the largest freshwater lake in the world by surface areaThe Caspian Sea is the largest lake, but is saline, not freshwater. and the third-largest by volume, holding 10% of the world's surface fresh wa ...
. The
Lake Michigan Circle Tour The Great Lakes Circle Tour is a designated scenic road system connecting all of the Great Lakes and the St. Lawrence River. It consists of routes for circumnavigating the lakes, either individually or collectively. It was designated by the Grea ...
was signed on maps by 1988. In May 2001, the section of US 12 through
Saline Saline may refer to: * Saline (medicine), a liquid with salt content to match the human body * Saline water, non-medicinal salt water * Saline, a historical term (especially US) for a salt works or saltern Places * Saline, Calvados, a commune in ...
was designated a
Michigan Historic Heritage Route Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
. The segment through
Clinton Clinton is an English toponymic surname, indicating one's ancestors came from English places called Glympton or Glinton.Hanks, P. & Hodges, F. ''A Dictionary of Surnames''. Oxford University Press, 1988 Clinton has frequently been used as a given ...
was given the same status in October 2002. On June 9, 2004, the full length of US 12 was dedicated as the US 12 Heritage Trail. In December 2014, this became a
Pure Michigan Byway A Pure Michigan Byway is the designation for a segment of the State Trunkline Highway System in the US state of Michigan that is a "scenic, recreational, or historic route that is representative of Michigan's natural and cultural heritage." The ...
when Governor
Rick Snyder Richard Dale Snyder (born August 19, 1958) is an American business executive, venture capitalist, attorney, accountant, and politician who served as the 48th governor of Michigan from 2011 to 2019. A member of the Republican Party, Snyder previ ...
signed legislation renaming the Michigan Heritage Route System to the Pure Michigan Byway System.


Major intersections


Related routes


Kalamazoo alternate route

US Highway 12A (US 12A) was an
alternate route An official alternate route is a special route in the United States that provides an alternate alignment for a highway. They are loop roads and found in many road systems in the United States including the U.S. Highway system and various state an ...
of US 12 in the
Kalamazoo Kalamazoo ( ) is a city in the southwest region of the U.S. state of Michigan. It is the county seat of Kalamazoo County. At the 2010 census, Kalamazoo had a population of 74,262. Kalamazoo is the major city of the Kalamazoo-Portage Metropolit ...
area. The highway followed Michigan Avenue from Kalamazoo eastward along the north side of the
Kalamazoo River The Kalamazoo River is a river in the U.S. state of Michigan. The river is long from the junction of its North and South branches to its mouth at Lake Michigan, with a total length extending to when one includes the South Branch.U.S. Geologica ...
to Comstock, where it terminated at an intersection with M-96. The highway was formed in 1931 when US 12 was rerouted in the area. In 1954, the designation was decommissioned when M-96 was extended to Kalamazoo on the south side of the Kalamazoo River along King Highway. Major intersections


Niles business loop

Business US Highway 12 (Bus. US 12) was a
business route A business route (or business loop, business spur, or city route) in the United States is a short special route connected to a ''parent'' numbered highway at its beginning, then routed through the central business district of a nearby city or ...
running in Niles. The western terminus was at the corner of West Chicago Road and US 12 (Pulaski Highway) east of the US 12/ US 31 interchange. From there, the business loop followed Chicago Road northeasterly through residential areas on the west side of town. Bus. US 12 turned north along Lincoln Avenue and then east on Main Street, crossing the St. Joseph River. The loop intersected the southern end of M-139 at Front Street one block east of the river in downtown Niles. Four blocks further east, Bus. US 12 met
M-51 M51 or M-51 may refer to: * M-51 (Michigan highway), a state highway in Michigan * M51 highway (Russia) * M51 (Cape Town), a Metropolitan Route in Cape Town, South Africa * M51 Skysweeper, an anti-aircraft gun * M51 MACI mine * M51 SLBM, a French ...
. The two highways merged along Main Street and then turned south along 11th Street at an intersection that also marks the western terminus of Bus. M-60 (Oak Street). Bus. US 12/M-51 continued south along 11th Street to the corner of US 12 (Pulaski Highway) and
M-51 M51 or M-51 may refer to: * M-51 (Michigan highway), a state highway in Michigan * M51 highway (Russia) * M51 (Cape Town), a Metropolitan Route in Cape Town, South Africa * M51 Skysweeper, an anti-aircraft gun * M51 MACI mine * M51 SLBM, a French ...
(South 11th Street) where the business loop terminated. The trunkline was first designated in 1956 as a business route of US 112. At that time, US 112 and M-60 were transferred to a bypass south of Niles. When US 112 was decommissioned in January 1962, Bus. US 112 was redesignated Bus. US 12 to match the new US 12 designation. In 1986, US 33 was truncated in Michigan to end at US 12. Bus. US 12 was rerouted in Niles to replace US 33 through town; Bus. US 31 was added a year later when the signage was updated in the area. In 1998, US 33 was removed from Michigan completely. At this time, M-51 was extended over former US 33 and replaced part of the Bus. US 31 designation in Niles. On March 5, 2010, the segment of Bus. US 12 between Bus. US 31 and M-51 was turned over to local control. In April 2010 the Bus. US 12 designation was retired when an extended M-139 replaced it from the local control section southwestward prior to maps and signage being changed. The concurrent segment along M-51 became M-51 only. Major intersections


Ypsilanti business loop

Business US Highway 12 (Bus. US 12) is a business route running in Ypsilanti. The loop starts at exit 183 on I-94/US 12 south of downtown Ypsilanti and runs northward along the
one-way pair A one-way pair, one-way couple, or couplet refers to that portion of a bi-directional traffic facilitysuch as a road, bus, streetcar, or light rail linewhere its opposing flows exist as two independent and roughly parallel facilities. Descriptio ...
ing of Huron Street (northbound) and Hamilton Street (southbound). At the intersection with Michigan Avenue in downtown, the two directions reunite and turn eastward, merging onto M-17 in the process. Michigan Avenue crosses the
Huron River The Huron River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed November 7, 2011 river in southeastern Michigan, rising out of the Huron Swamp in Springfield Township in north ...
and continues due east until an intersection at Prospect Street where it turns northeasterly. M-17 separates from Bus. US 12 at Ecorse Road, and Michigan Avenue continues through commercial areas, exiting the city of Ypsilanti. Once Bus. US 12 crosses from
Washtenaw County Washtenaw County () is a county located in the U.S. state of Michigan. At the 2020 census, the population was 372,258. The county seat is Ann Arbor. The county was authorized by legislation in 1822 and organized as a county in 1826. Washtenaw ...
into Wayne County, it expands into a
boulevard A boulevard is a type of broad avenue planted with rows of trees, or in parts of North America, any urban highway. Boulevards were originally circumferential roads following the line of former city walls. In American usage, boulevards may ...
with
Michigan left A Michigan left or P-turn is an at-grade intersection design that replaces each left (farside) turn at an intersection between a (major) divided roadway and a secondary (minor) roadway with the combination of a right (nearside) turn followe ...
turns. Just north of the
Willow Run Willow Run, also known as Air Force Plant 31, was a manufacturing complex in Michigan, United States, located between Ypsilanti Township and Belleville, built by the Ford Motor Company to manufacture aircraft, especially the B-24 Liberator heav ...
industrial complex, Bus. US 12 terminates where US 12 merges onto Michigan Avenue. In 1942 or 1943, Ypsilanti was bypassed by a Bypass US 112 (Byp. US 112). US 112 continued to run along its routing in Ypsilanti. The first business loop in Ypsilanti was created in 1956 when US 112 was realigned to bypass downtown along the former Byp. US 112. The former route through downtown was then numbered Bus. US 112. The current designation was changed to Bus. US 12 in 1962 when US 12 replaced US 112. Major intersections


Suffixed route

US Highway 112S (US 112S) was a spur route of US 112 in the mid-1930s. Originally, US 112 turned southward at
Union Union commonly refers to: * Trade union, an organization of workers * Union (set theory), in mathematics, a fundamental operation on sets Union may also refer to: Arts and entertainment Music * Union (band), an American rock group ** ''Un ...
and ran to US 20 in
Elkhart, Indiana Elkhart ( ) is a city in Elkhart County, Indiana, United States. The city is located east of South Bend, Indiana, east of Chicago, Illinois, and north of Indianapolis, Indiana. Elkhart has the larger population of the two principal cities of th ...
. In 1933, this section of highway was renumbered US 112S, before US 112 was relocated to go through
Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
's southwesternmost counties in 1935. At the same time, US 112S was renumbered M-205, a designation it would hold until it was transferred to local control on October 10, 2002,
decommissioning Decommissioning is a general term for a formal process to remove something from an active status, and may refer to: Infrastructure * Decommissioned offshore * Decommissioned highway * Greenfield status of former industrial sites * Nuclear decommi ...
the trunkline.


See also

*


Notes


References


Further reading

*


External links

*
US 12
at Michigan Highways US 12
at Michigan Highway Ends-->
US 12 Heritage Trail
(Southwestern Michigan Planning Commission) *

at Michigan Highways *

at Michigan Highways

at Michigan Highways {{DEFAULTSORT:US012 12 Michigan Lake Michigan Circle Tour Transportation in Berrien County, Michigan Transportation in Cass County, Michigan Transportation in St. Joseph County, Michigan Transportation in Branch County, Michigan Transportation in Hillsdale County, Michigan Transportation in Lenawee County, Michigan Transportation in Washtenaw County, Michigan Transportation in Wayne County, Michigan