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Interstate 94 (I-94) is a part of the
Interstate Highway System The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Hi ...
that runs from
Billings, Montana Billings is the most populous Lists of populated places in the United States, city in the U.S. state of Montana, with a population of 117,116 as of the 2020 United States census, 2020 census. Located in the south-central portion of the state, i ...
, to the
Lower Peninsula The Lower Peninsula of Michigan – also known as Lower Michigan – is the larger, southern and less elevated of the two major landmasses that make up the U.S. state of Michigan; the other being the Upper Peninsula, which is separated by the S ...
of the US state of
Michigan Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...
. In Michigan, it is a state trunkline highway that enters the state south of New Buffalo and runs eastward through several metropolitan areas in the southern section of the state. The highway serves
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 near
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 depth () after Lake Superior and the third-largest by surface area (), after Lake Superior and Lake Huron. To the ...
before turning inland toward
Kalamazoo Kalamazoo ( ) is a city in Kalamazoo County, Michigan, United States, and its county seat. At the 2020 United States census, 2020 census, Kalamazoo had a population of 73,598. It is the principal city of the Kalamazoo–Portage metropolitan are ...
and
Battle Creek Battle Creek is a city in northwestern Calhoun County, Michigan, United States, at the confluence of the Kalamazoo River, Kalamazoo and Battle Creek River, Battle Creek rivers. As of the 2020 United States census, 2020 census, the city had a tota ...
on the west side of the peninsula. Heading farther east, I-94 passes through rural areas in the middle of the southern Lower Peninsula, crossing
I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of eight unconnected segments. The longest segment runs from Evansville, Indiana, northeast to the Canada–United States border, Canadian border in Po ...
in the process. I-94 then runs through
Jackson Jackson may refer to: Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Queensland, a locality in the Maranoa Region * Jackson South, Queensland, a locality in the Maranoa Region * Jackson oil field in Durham, ...
,
Ann Arbor Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 United States census, 2020 census recorded its population to be 123,851, making it the List of municipalities in Michigan, fifth-most populous cit ...
, and portions of
Metro Detroit Metro Detroit is a major metropolitan area in the U.S. state of Michigan, consisting of the city of Detroit and over 200 municipalities in the Southeast Michigan, surrounding area. There are varied definitions of the area, including the officia ...
, connecting Michigan's largest city to its main airport. Past the east side of
Detroit Detroit ( , ) is the List of municipalities in Michigan, most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from Windsor, Ontario. It had a population of 639,111 at the 2020 United State ...
, the Interstate angles northeasterly through farmlands in
The Thumb The Thumb is a region and a peninsula of the U.S. state of Michigan, so named because the Lower Peninsula of Michigan, Lower Peninsula is shaped like a mitten. The Thumb area is generally considered to be in the Central Michigan region, east of t ...
to Port Huron, where the designation terminates on the
Blue Water Bridge The Blue Water Bridge is a twin-span international bridge across the St. Clair River that links Port Huron, Michigan, United States, and Point Edward, Ontario, Canada. The Blue Water Bridge connects Highway 402 in Ontario with both Interst ...
at the
Canada–United States border The international border between Canada and the United States is the longest in the world by total length. The boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is long. The land border has two sections: Canada' ...
. The first segment of what later became I-94 within the state, the Willow Run Expressway, was built near Ypsilanti and Belleville in 1941, with an easterly extension to Detroit in 1945. This expressway was initially numbered M-112. In the mid-1950s, state and federal officials planned an Interstate to replace the original route of US Highway 12 (US 12). By 1960, the length of I-94 was completed from Detroit to New Buffalo. Two years later, the US 12 designation was dropped from the freeway. Subsequent extensions in the 1960s completed most of the rest of the route, including the remaining sections between Detroit and Port Huron which superseded the routing of US 25. The last segment opened to the public in 1972 when Indiana completed its connection across the state line. Since completion, I-94 has remained relatively unchanged; a few interchanges have been rebuilt, a second span was constructed for the Blue Water Bridge, and, in 1987, a plane crashed on the freeway during takeoff from the airport in Detroit. The routing of I-94 is notable for containing the first full freeway-to-freeway interchange in the United States, connecting to the Lodge Freeway ( M-10), and for comprising the first complete border-to-border toll-free freeway in a state in the United States. The highway has one auxiliary route, I-194, which serves downtown Battle Creek, and eight
business route A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or to ...
s. Various segments have been dedicated to multiple people and places.


Route description

The entire length of I-94 is listed on the National Highway System, a network of roadways important to the country's economy, defense, and mobility. The freeway carried 168,200 vehicles on average between
I-75 Interstate 75 (I-75) is a major north–south Interstate Highway System, Interstate Highway in the Great Lakes region, Great Lakes and Southeastern United States, Southeastern regions of the United States. As with most Interstates that end ...
and Chene Street in
Detroit Detroit ( , ) is the List of municipalities in Michigan, most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from Windsor, Ontario. It had a population of 639,111 at the 2020 United State ...
, which is the peak traffic count in 2015, and it carried 12,554 vehicles immediately west of the
Blue Water Bridge The Blue Water Bridge is a twin-span international bridge across the St. Clair River that links Port Huron, Michigan, United States, and Point Edward, Ontario, Canada. The Blue Water Bridge connects Highway 402 in Ontario with both Interst ...
in Port Huron, the lowest traffic count in 2015. As the state trunkline highway closest to the lake shore in these areas, I-94 carries the
Lake Michigan Circle Tour The Great Lakes Circle Tour is a designated scenic road system connecting all of the Great Lakes and the Saint Lawrence River, St. Lawrence River. It consists of routes for circumnavigating the lakes, either individually or collectively. It was ...
south of
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 and the
Lake Huron Circle Tour The Great Lakes Circle Tour is a designated scenic road system connecting all of the Great Lakes and the Saint Lawrence River, St. Lawrence River. It consists of routes for circumnavigating the lakes, either individually or collectively. It was ...
in the Port Huron area. Sections through the Detroit area are named the Detroit Industrial and Edsel Ford freeways. I-94 in the state is either a four- or six-lane freeway for most of its length; one segment in the Detroit area has up to 10 lanes total near the airport.


Southwestern Michigan

I-94 enters Michigan from Indiana south of New Buffalo. The freeway runs northeasterly through rural
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 ...
farmland in the southwestern corner of the Lower Peninsula and parallels the Lake Michigan shoreline about inland. I-94 traverses an area just east of the Warren Dunes State Park as the freeway runs parallel to the Red Arrow Highway, a former routing of US 12 named after the 32nd Infantry Division (Red Arrow Division). The freeway crosses its companion highway south of St. Joseph; Red Arrow turns northward carrying the business loop for Benton Harbor and St. Joseph ( Business Loop I-94, L I-94. The Interstate curves further inland to bridge the St. Joseph River near Riverview Park. East of Benton Harbor, I-94 meets the other end of BL I-94 at an interchange where US 31 merges onto the freeway. East of the Southwest Michigan Regional Airport, I-94/US 31 meets the southern end of I-196; US 31 departs the I-94 freeway to follow I-196, and I-94 continues its course away from Lake Michigan. South of Coloma, the trunkline turns eastward and roughly follows the
Paw Paw River The Paw Paw River is located in the U.S. state of Michigan in the southwest portion of the lower peninsula. It is formed by the confluence of the north and south branches at in Waverly Township, Van Buren County, Michigan, Waverly Township in th ...
on a course that takes it south of Watervliet and
Hartford Hartford is the List of capitals in the United States, capital city of the U.S. state of Connecticut. The city, located in Hartford County, Connecticut, Hartford County, had a population of 121,054 as of the 2020 United States census, 2020 ce ...
. Between the latter two cities, the freeway transitions from northeastern Berrien County into western Van Buren County. It curves around and between Lake Cora and Threemile Lake near the junction with the northern end of M-51. About further east, I-94 crosses M-40 south of Paw Paw. Continuing eastward, the Interstate runs through Mattawan before entering western Kalamazoo County. In Texas Township, the freeway enters the western edges of the Kalamazoo suburbs. South of the campus for
Western Michigan University Western Michigan University (Western Michigan, Western or WMU) is a Public university, public research university in Kalamazoo, Michigan, United States. It was initially established as Western State Normal School in 1903 by Governor Aaron T. B ...
's College of Engineering & Applied Sciences in
Portage Portage or portaging ( CA: ; ) is the practice of carrying water craft or cargo over land, either around an obstacle in a river, or between two bodies of water. A path where items are regularly carried between bodies of water is also called a '' ...
, I-94 intersects US 131. Near the Kalamazoo/Battle Creek International Airport, the Interstate passes into the southeastern corner of Kalamazoo before entering Comstock Township. The freeway intersects the eastern end of Business Spur I-94 (BS I-94) at a partial interchange near Morrow Lake in the township. I-94 continues out of the eastern Kalamazoo suburbs, paralleling 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. Geologic ...
through the Galesburg area. Before crossing into Calhoun County on the west side of
Battle Creek Battle Creek is a city in northwestern Calhoun County, Michigan, United States, at the confluence of the Kalamazoo River, Kalamazoo and Battle Creek River, Battle Creek rivers. As of the 2020 United States census, 2020 census, the city had a tota ...
, I-94 has the only driveway on any of Michigan's Interstate Highways for a gate providing access for military vehicles into the
Fort Custer Training Center Fort Custer Training Center, often known simply as Fort Custer, is a federally owned and state-operated Michigan Army National Guard training facility, but is also used by other branches of the armed forces and armed forces from Illinois, Indian ...
. The Interstate enters Calhoun County southwest of the W. K. Kellogg Airport and enters the city of Battle Creek. Immediately east of the county line, the freeway has an interchange with the western end of Battle Creek's business loop. Next to Lakeview Square Mall, I-94 meets its only auxiliary Interstate in Michigan: I-194. I-94 turns to the northwest to round Beadle Lake, intersecting M-294 before spanning the Kalamazoo River. East of the river crossing, the freeway meets an interchange for M-96, M-311, and the eastern end of the Battle Creek business loop near FireKeepers Casino Hotel in Emmett Township. Turning back eastward, the Interstate exits the eastern Battle Creek suburbs and continues to an interchange with
I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of eight unconnected segments. The longest segment runs from Evansville, Indiana, northeast to the Canada–United States border, Canadian border in Po ...
near
Marshall Marshall may refer to: Places Australia *Marshall, Victoria, a suburb of Geelong, Victoria ** Marshall railway station Canada * Marshall, Saskatchewan * The Marshall, a mountain in British Columbia Liberia * Marshall, Liberia Marshall Is ...
; the business loop for Marshall follows I-69 southward.


Into Metro Detroit

Continuing eastward, I-94 traverses rural land on the north side of Marshall. The freeway runs north of, and parallel to, the Kalamazoo River through eastern Calhoun County. It angles southeasterly toward
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 ...
before returning to an easterly course on the north side of town. I-94 crosses into western Jackson County before intersecting M-99. From there, it runs generally due east with a jog around
Parma Parma (; ) is a city in the northern Italian region of Emilia-Romagna known for its architecture, Giuseppe Verdi, music, art, prosciutto (ham), Parmesan, cheese and surrounding countryside. With a population of 198,986 inhabitants as of 2025, ...
. West of the county airport, the Jackson business loop follows M-60 southward, and I-94 travels through the north side of
Jackson Jackson may refer to: Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Queensland, a locality in the Maranoa Region * Jackson South, Queensland, a locality in the Maranoa Region * Jackson oil field in Durham, ...
. North of downtown, US 127 merges in from the north and runs concurrently with I-94 around the city. Southeast of
Michigan State Prison Michigan State Prison or Jackson State Prison, which opened in 1839, was the first prison in Michigan. After 150 years, the prison was divided, starting in 1988, into four distinct prisons, still in Jackson: the Parnall Correctional Facility whi ...
, US 127 departs to the south, and I-94 continues eastward through the rest of the county. The freeway runs north of the Chrysler Chelsea Proving Grounds in Chelsea next to the M-52 interchange. As I-94 continues easterly, it passes into the western edge of the
Ann Arbor Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 United States census, 2020 census recorded its population to be 123,851, making it the List of municipalities in Michigan, fifth-most populous cit ...
area. West of downtown, the M-14 freeway splits off to the northeast, and the Interstate turns to the south and southeast to curve around the south side of the city. The freeway passes between
Briarwood Mall Briarwood Mall is a shopping mall in Ann Arbor, Michigan, United States. The mall's three anchor stores are Macy's North, Macy's, JCPenney, and Von Maur. Surrounded by office and other development, the mall anchors the southern Ann Arbor comme ...
and
Ann Arbor Municipal Airport Ann Arbor Municipal Airport is a general aviation airport in Washtenaw County, Michigan, United States. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017 to 2021, in which it is c ...
. On the southeastern corner of Ann Arbor, I-94 intersects US 23 and continues around the south side of Ypsilanti. South of that city, the freeway also carries US 12 and 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 southeast Michigan, southeastern Michigan, rising out of the Huron Swamp in Springfie ...
north of the river's mouth at Ford Lake. I-94 jogs southeasterly around the south side of
Willow Run Airport Willow Run Airport is an airport in Van Buren Township, Michigan, Van Buren Charter Township and Ypsilanti Township, Michigan, Ypsilanti Charter Township, near Ypsilanti, Michigan, Ypsilanti, Michigan, United States, that serves freight, cor ...
complex, separating from US 12 and entering Wayne County. South of Willow Run, the Interstate parallels the north shore of Belleville Lake. East of the water body, it intersects I-275 near the northwest corner of
Detroit Metropolitan Airport Detroit Metropolitan Wayne County Airport is the primary international airport serving Detroit and its Metro Detroit, surrounding metropolitan area, in the U.S. state of Michigan. It is located in Romulus, Michigan, Romulus, a Detroit suburb ...
and angles northeasterly through the southwestern Detroit suburbs along the Detroit Industrial Freeway. I-94 uses the Gateway Bridge over the
single-point urban interchange A single-point urban interchange (SPUI, or ), also called a single-point interchange (SPI) or single-point diamond interchange (SPDI), is a type of highway interchange. The design was created in order to help move large volumes of traffic th ...
(SPUI) at US 24 (Telegraph Road) in
Taylor Taylor, Taylors or Taylor's may refer to: People * Taylor (surname) ** List of people with surname Taylor * Taylor (given name), including Tayla and Taylah * Taylor sept, a branch of Scottish clan Cameron * Justice Taylor (disambiguation) ...
; these bridges were inspired by
Super Bowl XL Super Bowl XL was an American football game between the National Football Conference (NFC) champion 2005 Seattle Seahawks season, Seattle Seahawks and the American Football Conference (AFC) champion 2005 Pittsburgh Steelers season, Pittsburgh S ...
and provide a western entrance to the city. Further east, the Interstate intersects M-39 (Southfield Freeway) and passes the
Uniroyal Giant Tire The Uniroyal Giant Tire was created by the United States Rubber Company for the 1964 New York World's Fair, where it functioned as a Ferris wheel. Since 1966 it has been a static display alongside Interstate 94 in Michigan, Interstate 94 in All ...
in Allen Park. I-94 then turns to the northeast through the
Ford River Rouge complex The Ford River Rouge complex (commonly known as the Rouge complex, River Rouge, or The Rouge) is a Ford Motor Company automobile factory complex located in Dearborn, Michigan, along the River Rouge (Michigan), River Rouge, upstream from its c ...
in Dearborn before turning back easterly on the Edsel Ford Freeway into Detroit. I-94 traverses Detroit in an east–west direction well inland of, and parallel to, the
Detroit River The Detroit River is an List of international river borders, international river in North America. The river, which forms part of the border between the U.S. state of Michigan and the Provinces and territories of Canada, Canadian province of Ont ...
. The freeway intersects I-96 (Jeffries Freeway) and M-10 (Lodge Freeway) on the West Side, passing the main campus of
Wayne State University Wayne State University (WSU) is a public university, public research university in Detroit, Michigan, United States. Founded in 1868, Wayne State consists of 13 schools and colleges offering approximately 375 programs. It is Michigan's third-l ...
before entering the East Side at M-1 (Woodward Avenue). Immediately east of the interchange with
I-75 Interstate 75 (I-75) is a major north–south Interstate Highway System, Interstate Highway in the Great Lakes region, Great Lakes and Southeastern United States, Southeastern regions of the United States. As with most Interstates that end ...
(Chrysler Freeway), I-94 forms the southern border of the Milwaukee Junction district. The Edsel Ford Freeway continues through residential neighborhoods of Detroit's East Side. The Interstate turns more northerly, mimicking the shoreline of
Lake St. Clair Lake St. Clair () is a freshwater lake that lies between the Canadian province of Ontario and the U.S. state of Michigan. It was named in 1679 by French Catholic explorers after Saint Clare of Assisi, on whose feast day they first saw the lake. ...
, and exits Detroit for Harper Woods. Just north of the interchange for M-102 (Vernier Road), the freeway crosses 8 Mile Road and enters Macomb County.


North to Canada

Running northward through Macomb County, I-94 meets the eastern end of I-696 (Reuther Freeway) about north of the county line in St. Clair Shores. The freeway continues to parallel the lakeshore and travels to the west of
Selfridge Air National Guard Base Selfridge Air National Guard Base or Selfridge ANGB is an Air National Guard installation located in Harrison Township, Michigan, near Mount Clemens. Selfridge Field was one of thirty-two Air Service training camps established after the Un ...
in Harrison Township. It turns back to the northeast at 23 Mile Road at the interchange with M-3 and M-29. North of 26 Mile Road, the freeway exits the northern suburbs and passes into farmland in
The Thumb The Thumb is a region and a peninsula of the U.S. state of Michigan, so named because the Lower Peninsula of Michigan, Lower Peninsula is shaped like a mitten. The Thumb area is generally considered to be in the Central Michigan region, east of t ...
region. South of Michigan Meadows Golf Course, I-94 crosses County Line Road and enters St. Clair County. The freeway continues northeasterly as far as Marysville before turning northward near St. Clair County International Airport. From there, it runs roughly parallel to the
St. Clair River The St. Clair River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed November 7, 2011 river in central North America which flows from Lake Huron into Lake St. Clair, forming part ...
. The Interstate travels along the western edge of residential areas for Marysville and Port Huron as it continues northward. Immediately west of downtown Port Huron, it intersects I-69; the two freeways merge and turn first east and then north through an interchange that also features connections to BL I-69. I-94/I-69 turns back to the east about north of their confluence to span the Black River north of downtown. On the eastern bank of the river, there is one final interchange for M-25 and BL I-69/ BL I-94 before the freeway reaches the toll and customs plazas for the twin-span Blue Water Bridge. Past these plazas, I-94/I-69 ascends the approach to the bridge which crosses the St. Clair River to Point Edward (
Sarnia Sarnia is a city in Lambton County, Ontario, Canada. It had a Canada 2021 Census, 2021 population of 72,047, and is the largest city on Lake Huron. Sarnia is located on the eastern bank of the junction between the Upper and Lower Great Lakes, ...
), Ontario. At the international boundary at the center of the river, the Interstate designations jointly terminate, becoming Ontario Highway 402.


History


Predecessor highways

The first major overland transportation corridors in the future state of Michigan were the Indian foot trails. One of these, the St. Joseph Trail, followed the general route of the modern I-94 across the state from 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 area east to the
Ann Arbor Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 United States census, 2020 census recorded its population to be 123,851, making it the List of municipalities in Michigan, fifth-most populous cit ...
area. 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 the Senate (the upper chamber) and the House of Representatives (the lower chamber). Article IV of the Michigan Con ...
; at the time, Division 6 corresponded to the rough path of today's I-94. 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 Highway System, Michigan State Trunkline Highway System wh ...
(MSHD) signposted the highway system for the first time, and three different highways followed sections of the modern I-94 corridor. The original M-11 ran from the Indiana state line north to Coloma where M-17 connected easterly to
Detroit Detroit ( , ) is the List of municipalities in Michigan, most populous city in the U.S. state of Michigan. It is situated on the bank of the Detroit River across from Windsor, Ontario. It had a population of 639,111 at the 2020 United State ...
. The third highway was M-19 from Detroit northeast to Port Huron. 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 ...
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 the original route of US 12 replaced the highways from the state line northeasterly to Detroit; US 31 overlapped the highway between St. Joseph and Watervliet. The remainder of the future I-94 corridor was served by US 25 between Detroit and Port Huron. The first span of the
Blue Water Bridge The Blue Water Bridge is a twin-span international bridge across the St. Clair River that links Port Huron, Michigan, United States, and Point Edward, Ontario, Canada. The Blue Water Bridge connects Highway 402 in Ontario with both Interst ...
opened between Port Huron and
Point Edward, Ontario Point Edward is a village in the Canadian province of Ontario. Adjacent to the city of Sarnia in Lambton County, Point Edward sits opposite Port Huron, Michigan and is connected to it by the Blue Water Bridge, at the meeting point of the St. C ...
, in 1938.


Early conversions to freeways

The first segments of upgraded highways along the future route of I-94 were added during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. Construction on the Willow Run Expressway started in 1941 before the US entered the war. It was opened on September 12, 1942, to provide improved access to
Ford Motor Company Ford Motor Company (commonly known as Ford) is an American multinational corporation, multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. T ...
's
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 Consolidated B-24 ...
bomber plants. The highway was given the M-112 designation at the time. The expressway was extended eastward as the Detroit Industrial Expressway into Detroit; the first section opened in 1943 and the remainder was completed in March 1945. Land acquisition for the Edsel Ford Freeway started in 1945. Originally referred to as the Crosstown Freeway, the freeway became known as the Edsel Ford Freeway following an April 1946 petition. The interchange between the Lodge Freeway and the Edsel Ford Freeway was built in 1953 as the first full freeway-to-freeway interchange in the US. In mid-1956, the M-112 designation was decommissioned and replaced by a rerouted US 12. During the mid-1950s, the Detroit Streets and Rails campaign proposed a high-speed rail line in the median of the Willow Run, Detroit Industrial and Edsel Ford freeways; instead of building the rail line, special boarding stations adjacent to dedicated bus lanes in the interchanges along the highway were used. In other parts of the state, other segments of highway were built to bypass the cities along the future I-94 corridor. In 1940, a southern bypass of Battle Creek opened along Columbia Avenue, and the former routing through downtown on Michigan Avenue became 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 (; ) is a city in the northern Italian region of Emilia-Romagna known for its architecture, Giuseppe Verdi, music, art, prosciutto (ham), Parmesan, cheese and surrounding countryside. With a population of 198,986 inhabitants as of 2025, ...
. 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 US 12A in the area. The first planning maps from 1947 for what later became the
Interstate Highway System The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Hi ...
included a highway along I-94's route in Michigan. This highway was included on the 1955 plan for the "National System of Interstate and Defense Highways" with a proposed spur in the Battle Creek area. The modern I-94 was numbered I-92 between Benton Harbor–St. Joseph and Detroit with I-77 from Detroit to Port Huron in the August 1957 plans. In April 1958, the MSHD wanted to provide a single number for a more direct routing of a Detroit–Chicago freeway; the state proposed rerouting I-94 to replace I-92 in the state, but retained the I-77 designation. On June 27, 1958, AASHO adopted their original numbering plan for Michigan, minus the state's proposed changes. Around the same time, a section of M-146 near Port Huron was converted into an approach freeway for the Blue Water Bridge.


Interstate Highway era

In January 1959, officials announced that sections of US 12, the Willow Run, Detroit Industrial and Edsel Ford expressways were to be given the I-94 designation, temporarily co-designated with US 12. These sections connected Ann Arbor to Detroit, along with a bypass of Kalamazoo to Galesburg and a bypass of Jackson. Later that year, additional segments of I-94 were opened, starting with a section from Hartford 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. In addition, a new northwest–southeast section of freeway was built east of Ypsilanti to create a more gradual curve in the routing between present-day exits 185 and 186, the original routing of the Willow Run Expressway having followed present-day Wiard Road. Signage for the state's Interstate Highways was placed on hold pending finalization of the numbering scheme, and by late 1959 that signage was being added starting with I-75 and followed by the other open segments of freeway in the state. Sections of freeway opened in southwestern Michigan in 1960 between the Benton Harbor–St Joseph area and between Jackson and Ann Arbor; the latter was built over existing portions of US 12. In this year, Michigan became the first state to complete a border-to-border toll-free Interstate within their state, running for from Detroit toward New Buffalo, creating the longest toll-free freeway in the country at the time. In January 1962, the US 12 designation was removed from the I-94 freeway. In the process, the designation was transferred to replace the US 112 designation in its entirety. After this transfer, I-94 was no longer concurrent with US 12, except for the Ypsilanti bypass. In 1963, the freeway was extended south of New Buffalo to end at M-239. Traffic was diverted down M-239 into Indiana where State Road 39 carried traffic the rest of the way to the
Indiana Toll Road The Indiana Toll Road, officially the Indiana East–West Toll Road, is a controlled-access toll road that runs for east–west across northern Indiana from the Illinois state line to the Ohio state line. It has been advertised as the "Main ...
. By the end of the year, a section of highway opened between Mount Clemens and Marysville, and US 25 was rerouted to run concurrently along the freeway from the New Baltimore area northward. The eastern terminus of I-94 in the Port Huron area was dedicated on October 14, 1964, signaling the completion of the highway between Marysville and the Blue Water Bridge. This completion displaced part of the M-146 bypass of Port Huron, the southern leg of which was retained as a connector to present-day Lapeer Road. Two years later, the gap between the Wayne–Macomb county line and the end of the freeway near Mount Clemens was filled in when another section of freeway opened. In late 1964, a plan was approved to improve the interchange with Telegraph Road ( US 24), as the original interchange did not feature access in all directions. North of
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 ...
, the route of the freeway previously crossed a branch of the
New York Central Railroad The New York Central Railroad was a railroad primarily operating in the Great Lakes region, Great Lakes and Mid-Atlantic (United States), Mid-Atlantic regions of the United States. The railroad primarily connected New York metropolitan area, gr ...
at-grade; the crossing was eliminated when the tracks were removed in 1968. The sections originally designated as the Willow Run Expressway were rebuilt from Rawsonville Road in Belleville to Ozga Road in
Romulus Romulus (, ) was the legendary founder and first king of Rome. Various traditions attribute the establishment of many of Rome's oldest legal, political, religious, and social institutions to Romulus and his contemporaries. Although many of th ...
starting in 1972. As part of this reconstruction, the segment between Haggerty and Ozga roads was widened from four to six lanes, and the eastbound lanes were realigned to facilitate construction of an interchange with I-275, a western bypass of Detroit which was under construction at the time. The Willow Run segment was also resurfaced at this point, as the old road bed did not contain steel mesh. Construction of this interchange also obliterated a partial interchange with Huron River Drive. The final section of I-94 in Michigan opened to traffic on November 2, 1972, when the connection across the state line into Indiana was dedicated. This last segment in Michigan between M-239 and the state line opened when Indiana completed an segment of freeway in their state.


Since completion

The interchange with the Southfield Freeway ( M-39) was closed entirely in 1985 to replace the original exit design, which included four on-ramps that sharply merged into the left lanes of I-94. Reconstruction added new on-ramps that merge into the freeway's right lane, while also moving the carriageways of I-94 closer together. On August 16, 1987, Northwest Airlines Flight 255 crashed after attempting to take off from
Detroit Metropolitan Airport Detroit Metropolitan Wayne County Airport is the primary international airport serving Detroit and its Metro Detroit, surrounding metropolitan area, in the U.S. state of Michigan. It is located in Romulus, Michigan, Romulus, a Detroit suburb ...
, killing all but one passenger upon exploding at the I-94 overpass over Middlebelt Road; that overpass was not damaged in the crash. The freeway was closed until August 18, and a memorial was later installed near the interchange between I-94 and Middlebelt Road. The completion of I-69 in the 1980s, and the approval of the
North American Free Trade Agreement The North American Free Trade Agreement (, TLCAN; , ALÉNA), referred to colloquially in the Anglosphere as NAFTA, ( ) was an agreement signed by Canada, Mexico, and the United States that created a trilateral trade bloc in North America. The ...
, increased traffic at the Blue Water Bridge. A new toll and customs plaza was built in 1991, and, later the next year, an international task force determined that traffic on the existing structure was exceeding capacity. Environmental planning started in 1993, and construction started on the second span between Port Huron and Point Edward, Ontario in 1995. In July 1997, the second span opened. The original span was closed for rehabilitation, and both were opened to traffic in 1999. The interchange with US 24 (Telegraph Road) following its mid-1960s redesign had only two bridges, and left-hand exits were used throughout. This interchange was reconfigured in 2005 to a SPUI design that was completed in December of that year. A pair of bridges called the Gateway Arch Bridges (alternately "Gateway to Detroit") was incorporated in the new interchange. In 2011, construction was started to widen I-94/I-69 approaching the Blue Water Bridge and to allow for dedicated local traffic and bridge traffic lanes. The lane configuration changes confused drivers in the area, especially motorists with outdated GPS devices; because of this, MDOT installed updated signs complete with American and Canadian flags to help prevent drivers from heading to Canada by mistake. Additional construction in the Port Huron area started in late 2013 to rebuild and reconfigure the I-94/I-69 interchange outside the city. The project improved of freeway, replaced several bridges and ramps and cost $76 million (equivalent to $ in ). In June 2014, MDOT closed the ramps from I-69 eastbound to BL I-69 through the interchange until later in the year. The project was completed in September 2015. In 2016, the sections of I-94 from the Indiana state line to the M-63 interchange was designated as part of the West Michigan Pike Pure Michigan Byway. The West Michigan Pike originated in efforts in the 1910s to improve a highway along the western part of the Lower Peninsula of Michigan and to increase tourism along the Lake Michigan shore. The
auto trail The system of auto trails was an informal network of marked routes that existed in the United States and Canada in the early part of the 20th century. Marked with colored bands on utility poles, the trails were intended to help travellers in t ...
was eventually superseded by US 12 and US 31 after the creation 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 ...
in 1926. In 2020, work began on the final link of the
St. Joseph Valley Parkway The St. Joseph Valley Parkway is a freeway in the U.S. states of Indiana and Michigan, serving as a bypass route around Elkhart, Mishawaka, and South Bend in Indiana and Niles in Michigan. The freeway runs to the south and west of Elkhart a ...
to connect the US 31 freeway to I-94 east of Benton Harbor. The project cost $121.5 million and involved reconstructing the interchange with the eastern terminus of BL I-94 and of I-94 in the area. US 31 was rerouted to follow its new freeway section for from the previous end of the freeway at Napier Avenue that opened in 2003 to I-94 at BL I-94, where US 31 then followed I-94 to the I-196 interchange as before. This new routing opened on November 9, 2022. In December 2022, 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 Interst ...
(MDOT) procured a statewide tolling study. Under the study, I-94 would be the first highway to be converted into a toll road starting in 2028. Lawmakers have not yet acted upon the department's recommendation in the proposal. Construction began on August 7, 2023, on a privately funded MDOT pilot project to upgrade the left lane for
connected Connected may refer to: Film and television * ''Connected'' (2008 film), a Hong Kong remake of the American movie ''Cellular'' * '' Connected: An Autoblogography About Love, Death & Technology'', a 2011 documentary film * ''Connected'' (2015 TV ...
and
autonomous In developmental psychology and moral, political, and bioethical philosophy, autonomy is the capacity to make an informed, uncoerced decision. Autonomous organizations or institutions are independent or self-governing. Autonomy can also be defi ...
vehicles between Ann Arbor and Detroit.


Memorial highway names

As the original expressway through the center of Detroit was being planned in the 1940s, it was unofficially named the Harper–McGraw Expressway after the streets along which it was to run. There was some initial support to name it after Roy D. Chapin, the late president of the
Hudson Motor Car Company The Hudson Motor Car Company made Hudson and other branded automobiles in Detroit, Michigan, U.S., from 1909 until 1954. In 1954, Hudson merged with Nash-Kelvinator to form American Motors Corporation (AMC). The Hudson name was continued through ...
and a former US secretary of commerce under President
Herbert Hoover Herbert Clark Hoover (August 10, 1874 – October 20, 1964) was the 31st president of the United States, serving from 1929 to 1933. A wealthy mining engineer before his presidency, Hoover led the wartime Commission for Relief in Belgium and ...
. On April 23, 1946, the Detroit Common Council voted instead to name the highway after
Edsel Ford Edsel Bryant Ford (November 6, 1893 – May 26, 1943) was an American business executive and philanthropist, who was the only child of pioneering industrialist Henry Ford and his wife, Clara Jane Bryant Ford. He was the president of Ford Motor C ...
, the son of
Henry Ford Henry Ford (July 30, 1863 – April 7, 1947) was an American Technological and industrial history of the United States, industrialist and business magnate. As the founder of the Ford Motor Company, he is credited as a pioneer in making automob ...
and president of the
Ford Motor Company Ford Motor Company (commonly known as Ford) is an American multinational corporation, multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. T ...
from 1918 until his death in 1943. Two other original sections of I-94's predecessor highways in the Detroit area were given early names. The westernmost of these is the Willow Run Expressway, named for 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 Consolidated B-24 ...
complex. The plants at Willow Run produced
B-24 Liberator The Consolidated B-24 Liberator is an American heavy bomber, designed by Consolidated Aircraft of San Diego, California. It was known within the company as the Model 32, and some initial production aircraft were laid down as export models desi ...
bombers for Ford Motor Company during World War II. The second, the Detroit Industrial Expressway, continued the route of the Willow Run Expressway eastward into Detroit. Both highways were built to move workers from Detroit to the industrial plants at Willow Run during the war and were later incorporated into I-94 in the 1950s as part of a Detroit–Chicago highway. The section of I-94 northeast of Detroit was named after former Congressman James G. O'Hara by 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 the Senate (the upper chamber) and the House of Representatives (the lower chamber). Article IV of the Michigan Con ...
. O'Hara was a World War II veteran who served in the
US House of Representatives The United States House of Representatives is a chamber of the bicameral United States Congress; it is the lower house, with the U.S. Senate being the upper house. Together, the House and Senate have the authority under Article One of th ...
from 1959 until 1977. During his tenure in Congress, he procured federal funds for the construction of I-94 through his district. The first attempt to name the highway after him failed in 1991, but the honor was included in a budget bill passed in 1997. The section of I-94 was dedicated on October 16, 1998, after donors privately raised nearly $10,000 (equivalent to $ in ) to pay for the highway signs. A segment of I-94 in
Battle Creek Battle Creek is a city in northwestern Calhoun County, Michigan, United States, at the confluence of the Kalamazoo River, Kalamazoo and Battle Creek River, Battle Creek rivers. As of the 2020 United States census, 2020 census, the city had a tota ...
between the exits for BL I-94 and I-194 was named the 94th Combat Infantry Division Memorial Highway by the Michigan Legislature in 2002. The name honors the US Army's 94th Infantry Division, which was activated at nearby Fort Custer in 1942 and served with distinction in the European theater of World War II. Because the unit originated in Battle Creek, and its number matched that of the freeway, the Legislature added the designation by passing Public Act 305 of 2002. The name was dedicated in ceremonies at a rest stop along the section of I-94 on September 28, 2002. Another piece of I-94 in Calhoun County was designated in 2004 as part of the Underground Railroad Memorial Highway. Starting in 1990, the
National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List ...
started working to identify routes of the
Underground Railroad The Underground Railroad was an organized network of secret routes and safe houses used by freedom seekers to escape to the abolitionist Northern United States and Eastern Canada. Enslaved Africans and African Americans escaped from slavery ...
. The Battle Creek area was active in the railroad during the Civil War, and the section of I-94 between exits 98 and 110 east of Battle Creek was included in the memorial designation. In June 2012, after a resolution passed by the Michigan Legislature was signed by 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. Snyder, who was born in Battle Creek, Michigan, ...
, a portion of I-94 in
Taylor Taylor, Taylors or Taylor's may refer to: People * Taylor (surname) ** List of people with surname Taylor * Taylor (given name), including Tayla and Taylah * Taylor sept, a branch of Scottish clan Cameron * Justice Taylor (disambiguation) ...
between Inkster and Pelham roads was named the Auxiliary Lt. Dan Kromer Memorial Highway after a 20-year veteran of the Taylor Police Department, who was killed in 2010 while helping motorists who had car trouble.


Exit list


Related trunklines

There are nine highways related to I-94 in Michigan. The first is the spur into downtown
Battle Creek Battle Creek is a city in northwestern Calhoun County, Michigan, United States, at the confluence of the Kalamazoo River, Kalamazoo and Battle Creek River, Battle Creek rivers. As of the 2020 United States census, 2020 census, the city had a tota ...
numbered I-194 and nicknamed "The Penetrator" and officially called the "Sojourner Truth Downtown Parkway".. This
auxiliary Interstate Highway Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System. The 323 auxiliary routes generally fall into three types: spur routes, which connect to or i ...
runs for about to connect I-94 northward into downtown. The other eight highways are
business loop A business route (or business loop, business spur, or city route) in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or t ...
s of I-94 that connect various cities' downtowns with the main freeway. Unlike I-194, these loops are not freeways. Located from west to east along I-94's routing in Michigan, they serve Benton Harbor–St. Joseph,
Kalamazoo Kalamazoo ( ) is a city in Kalamazoo County, Michigan, United States, and its county seat. At the 2020 United States census, 2020 census, Kalamazoo had a population of 73,598. It is the principal city of the Kalamazoo–Portage metropolitan are ...
,
Battle Creek Battle Creek is a city in northwestern Calhoun County, Michigan, United States, at the confluence of the Kalamazoo River, Kalamazoo and Battle Creek River, Battle Creek rivers. As of the 2020 United States census, 2020 census, the city had a tota ...
,
Marshall Marshall may refer to: Places Australia *Marshall, Victoria, a suburb of Geelong, Victoria ** Marshall railway station Canada * Marshall, Saskatchewan * The Marshall, a mountain in British Columbia Liberia * Marshall, Liberia Marshall Is ...
,
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 ...
,
Jackson Jackson may refer to: Places Australia * Jackson, Queensland, a town in the Maranoa Region * Jackson North, Queensland, a locality in the Maranoa Region * Jackson South, Queensland, a locality in the Maranoa Region * Jackson oil field in Durham, ...
,
Ann Arbor Ann Arbor is a city in Washtenaw County, Michigan, United States, and its county seat. The 2020 United States census, 2020 census recorded its population to be 123,851, making it the List of municipalities in Michigan, fifth-most populous cit ...
, and Port Huron.


See also

*


Notes


References


External links

*
I-94
at Michigan Highways

at Michigan Highways

at Michigan Highways {{DEFAULTSORT:I094
Michigan Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...
94 Lake Michigan Circle Tour Transportation in Berrien County, Michigan Transportation in Van Buren County, Michigan Transportation in Kalamazoo County, Michigan Transportation in Calhoun County, Michigan Transportation in Jackson County, Michigan Transportation in Washtenaw County, Michigan Transportation in Wayne County, Michigan Transportation in Macomb County, Michigan Transportation in St. Clair County, Michigan