U.S. Route 23 In Michigan
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US Highway 23 (US 23) is a north–south
United States Numbered 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 h ...
that runs from
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, to
Mackinaw City, Michigan Mackinaw City ( ) is a village at the northernmost point of the Lower Peninsula of Michigan, United States. Divided between Cheboygan and Emmet counties, Mackinaw City is located at the southern end of the Mackinac Bridge, which carries Inter ...
. In 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, ...
, it is a major, , north–south state trunkline highway that runs through the Lower Peninsula. The trunkline is a
freeway 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 ...
from the Michigan–
Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...
state line near Lambertville to the city of Standish, and it follows the
Lake Huron Lake Huron ( ) is one of the five Great Lakes of North America. It is shared on the north and east by the Canadian province of Ontario and on the south and west by the U.S. state of Michigan. The name of the lake is derived from early French ex ...
shoreline from there to its northern terminus. Serving the cities of
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
Flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start ...
, US 23 acts as a freeway bypass of the
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 ...
area. Overall, the highway runs through rural areas of the state dominated by farm fields or woodlands; some segments are urban in character in the Ann Arbor, Flint and Tri-Cities areas. The section from Flint north to Standish also carries
Interstate 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 S ...
(I-75) along a concurrency that includes a segment that carries almost 70,000 vehicles on a daily basis. The first transportation routes along what is now US 23 in the state were sections of two Indian trails. In the early 20th century, four different
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 ...
names were applied to roads now a part of the highway. These roads were included as part of two state highways in the initial state highway system in 1919. When the United States Numbered Highway System was first designated on November 11, 1926, the new US 23 replaced the other designations along its route. Since creation, the road has been moved and realigned several times. Through the 1930s and 1940s, the lakeshore routing was created to replace a path that ran further inland through the northern portion of the state. Starting in the early 1950s, various sections in the southeastern and central areas of the Lower Peninsula were upgraded to freeways, bypassing several major cities in the area. These improvements were completed by the end of the 1960s. Since then a new crossing of the
Saginaw River The Saginaw River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed November 7, 2011 river in the U.S. state of Michigan. It is formed by the confluence of the Tittabawassee River, ...
at Zilwaukee was built to replace a drawbridge that carried the I-75/US 23 freeway over a shipping channel. Various memorial or tourist route designations have been applied to US 23 in the state since the 1980s. The highway has been a part of 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 ...
since the creation of the
Great Lakes 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 Gre ...
s in 1986. The non-freeway section was designated the Sunrise Side Coastal Highway by 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) in 2004 as a part of what is now the
Pure Michigan Byway A Pure Michigan Byway is the designation for a segment of the Michigan State Trunkline Highway System, State Trunkline Highway System in the US state of Michigan that is a "scenic, recreational, or historic route that is representative of Michiga ...
Program. Since 2009, it has been called the Huron Shores Heritage Route. The highway has also carried two memorial designations related to war veterans and a third related to local civic leaders since a 2001 consolidation of related legislation in the state. MDOT has listed two of the highway's bridges on its historic bridge list, one of which is also on the
National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...
(NRHP). Future improvements to the route of US 23 include a proposed northerly extension of the freeway from Standish to one of several locations along the Lake Huron shoreline. Another freeway has been proposed in the Flint area that could connect US 23 directly to the south end of I-475.


Route description

US 23 runs for through the Lower Peninsula of Michigan, serving as a freeway bypass to the west 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 ...
and a scenic highway through the northern portion of the state along Lake Huron. Between
Flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start ...
and Standish, US 23 runs concurrently 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 ...
; the combined freeway section from Flint to Bay City can contain between six and eight lanes total while the rest of the US 23 freeway is mostly four lanes. Non-freeway segments of US 23 in the state are two lanes. Like other state trunkline highways, it is maintained by 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). All of US 23 in the state south of the M-32 junction in Alpena has been listed on the National Highway System, a network of roads important to the country's economy, defense, and mobility. From the Standish area north, the highway is also a part of 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 ...
and the Huron Shores Heritage Route, a
Pure Michigan Byway A Pure Michigan Byway is the designation for a segment of the Michigan State Trunkline Highway System, State Trunkline Highway System in the US state of Michigan that is a "scenic, recreational, or historic route that is representative of Michiga ...
.


Southeastern Michigan

US 23 enters Michigan on a freeway northwest of
Toledo, Ohio Toledo ( ) is a city in Lucas County, Ohio, United States, and its county seat. It is located at the western end of Lake Erie along the Maumee River. Toledo is the List of cities in Ohio, fourth-most populous city in Ohio and List of United Sta ...
, concurrent with US 223. This freeway runs north through farm fields in rural western Monroe County near Lambertville. About north of the state line, US 223 leaves the freeway and turns west onto St. Anthony Road; US 23 continues northward on the freeway. South of
Dundee Dundee (; ; or , ) is the List of towns and cities in Scotland by population, fourth-largest city in Scotland. The mid-year population estimate for the locality was . It lies within the eastern central Lowlands on the north bank of the Firt ...
, US 23 crosses the
River Raisin The River Raisin (, 'River of Sturgeon') is a river in southeast Michigan, United States, that flows in a generally easterly direction through Ice age, glacial sediments before emptying into Lake Erie. The River Raisin drainage basin covers app ...
before coming to an interchange with M-50 next to the
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store west of town. North of town, the freeway passes near an industrial area. Farther north, it crosses a line of the Ann Arbor Railroad near Azalia as the trunkline runs to the east of
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at the Monroe- Washtenaw county line. North of Milan, the freeway crosses a line of the
Norfolk Southern Railway The Norfolk Southern Railway is a Class I freight railroad operating in the Eastern United States. Headquartered in Atlanta, the company was formed in 1982 with the merger of the Norfolk and Western Railway and Southern Railway. The comp ...
. The landscape takes on a more suburban residential character as the freeway approaches the Ann Arbor area. There are separate interchanges for US 12 (Michigan Avenue) and I-94 on the southeast side of the city. Between I-94 and Washtenaw Avenue, US 23 carries the Business Loop I-94 (BL I-94) moniker as well. That secondary designation leaves the freeway and runs west on Washtenaw Avenue into downtown Ann Arbor and the campus of the
University of Michigan The University of Michigan (U-M, U of M, or Michigan) is a public university, public research university in Ann Arbor, Michigan, United States. Founded in 1817, it is the oldest institution of higher education in the state. The University of Mi ...
. At the same interchange, a Business US 23 (Bus. US 23) designation also follows Washtenaw Avenue to the west; east of US 23, M-17 follows Washtenaw Avenue and connects the freeway with Ypsilanti. North of this interchange, US 23 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 ...
near the campus of the local community college and continues north to a junction with the M-14 freeway. The two merge and run westward along the north side of the city before US 23 turns north and M-14 curves south. North of Ann Arbor, the freeway runs through woodlands and near several lakes and features a flex route system allowing traffic to use the inner shoulder during peak times. In the community of Whitmore Lake, US 23 crosses into Livingston County near the city's namesake body of water. East of
Brighton Brighton ( ) is a seaside resort in the city status in the United Kingdom, city of Brighton and Hove, East Sussex, England, south of London. Archaeological evidence of settlement in the area dates back to the Bronze Age Britain, Bronze Age, R ...
, the freeway intersects I-96 and continues north to an intersection with M-59 south of Hartland. The highway turns northeasterly by Runyon Lake and runs toward the city of Fenton. The trunkline passes through town and bends back toward the northwest, running between lakes Ponemah and Fenton. Continuing north, the environment around US 23 transitions to rural farm fields as the freeway approaches the south side of the Flint area.


Flint and the Tri-Cities area

West of Grand Blanc, US 23 meets I-75, and the two freeways merge near the Bishop International Airport and continue along the west side of the Flint metro area. I-75/US 23 has 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 the crossing with the
Canadian National Railway The Canadian National Railway Company () is a Canadian Class I freight railway headquartered in Montreal, Quebec, which serves Canada and the Midwestern and Southern United States. CN is Canada's largest railway, in terms of both revenue a ...
line. Continuing northwards through suburban residential areas, the highway crosses the Flint River while running along the west side of the city. In Mount Morris Township, the freeway intersects the northern end of I-475 before meeting M-57 near
Clio In Greek mythology, Clio ( , ; ), also spelled Kleio, Сleio, or Cleo, is the muse of history, or in a few mythological accounts, the muse of lyre-playing. Etymology Clio's name is derived from the Greek root κλέω/κλείω (meaning ...
. The highest traffic totals along US 23 in the state of Michigan were recorded by MDOT near the M-57 interchange; in 2009 an average 68,800 vehicles used that section of freeway daily. These traffic counts are expressed in terms of
annual average daily traffic Annual average daily traffic (AADT) is a measure used primarily in transportation planning, transportation engineering and retail location selection. Traditionally, it is the total volume of vehicle traffic of a highway or road for a year divided ...
(AADT), which is a statistical calculation of the average daily number of vehicles on a segment of roadway. Near Birch Run, the highway turns northwesterly next to a large outlet mall. Between here and the Saginaw area, the freeway runs through more wooded lands, crossing the Cass River near
Bridgeport Bridgeport is the most populous city in the U.S. state of Connecticut and the fifth-most populous city in New England, with a population of 148,654 in 2020. Located in eastern Fairfield County at the mouth of the Pequonnock River on Long Is ...
. I-75/US 23 enters the Tri-Cities (named for
Saginaw Saginaw () is a city in Saginaw County, Michigan, United States, and its county seat. It had a population of 44,202 at the 2020 census. Located along the Saginaw River, Saginaw is adjacent to Saginaw Charter Township and considered part of ...
, Bay City and Midland) when it bypasses Saginaw to the east. The freeway intersects M-46 in Buena Vista Township south of the junction with I-675. North of downtown Saginaw, the freeway crosses the
Saginaw River The Saginaw River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed November 7, 2011 river in the U.S. state of Michigan. It is formed by the confluence of the Tittabawassee River, ...
on the Zilwaukee Bridge, a " post-tensioned, segmental, oncrete
box girder bridge A box girder bridge, or box section bridge, is a bridge in which the main beam (structure), beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite ma ...
" that is "infamous" for a series of "construction mishaps, cost overruns, and government foibles." Past the bridge, I-75/US 23 meets the northern end of I-675 and continues through fields and woods to the Bay City area. At exit 162, the freeway meets the eastern terminus of US 10 and the western terminus of M-25 west of downtown. The next interchange north is with the Connector M-13 (CONN M-13) freeway, which was the previous northern end of US 23's freeway in Michigan. The connector runs due northward, and I-75/US 23 turns northwesterly to bypass around Kawkawlin. The highway veers north, crosses the Kawkawlin River and the Pinconning Creek before coming to an interchange southwest of Standish. There, US 23 curves east, separating from I-75. US 23 continues for about as a freeway which ends at the intersection with M-13 south of Standish. The lowest AADT along any freeway section of US 23 in Michigan is the section immediately east of I-75; here the traffic levels drop from 20,763 to 4,466 vehicles per day after US 23 separates from I-75.


Northern Michigan

US 23 runs north from the end of its freeway along Huron Road through the community of Standish. The trunkline turns northeasterly through lakeshore woodlands after the intersection with Old M-76. Northeast of this intersection, the highest, non-freeway AADT level on US 23 was recorded by MDOT at 16,757 vehicles daily. Running through
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, the highway crosses the Rifle River and a line of the Lake State Railway. In between the two crossings, it curves due east on its way out of town. At Hale Road, US 23 meets the southern end of M-65 before it continues east to Au Gres, where it runs along the
Saginaw Bay Saginaw Bay is a bay within Lake Huron located on the eastern side of the U.S. state of Michigan. It forms the space between Michigan's Thumb region and the rest of the Lower Peninsula of Michigan. Saginaw Bay is in area. It is located in parts ...
and crosses the Au Gres River. Huron Road meanders northward along the lakeshore, staying inland near Point Lookout. US 23 runs through woods as it follows the Saginaw Bays shoreline northeasterly through
Alabaster Alabaster is a mineral and a soft Rock (geology), rock used for carvings and as a source of plaster powder. Archaeologists, geologists, and the stone industry have different definitions for the word ''alabaster''. In archaeology, the term ''alab ...
to Tawas City. The highway intersects the eastern terminus of M-55, runs north and east around Tawas Bay to East Tawas and follows the Lake Huron shoreline to Oscoda. Through this area, US 23 runs parallel to the Lake State Railway and crosses into the
Huron National Forest The Huron National Forest is a United States National Forest, National Forest in the Lower Peninsula of Michigan. It was established in 1909 after the logging era began to decline. In 1945, it was administratively combined with the Manistee Nati ...
. Oscoda is the location of the eastern termini of both the River Road National Scenic Byway and County Road F-41. In between those two junctions, the highway crosses the Au Sable River near its mouth, and the trunkline passes by the former
Wurtsmith Air Force Base Wurtsmith Air Force Base is a decommissioned United States Air Force base in Iosco County, Michigan. Near Lake Huron, it operated for seventy years, from 1923 until decommissioned in 1993. On January 18, 1994, Wurtsmith was listed as a Superfun ...
. Huron Road continues north, running next to Van Etten Lake as it leaves the national forest. Further north, it runs along Cedar Lake when it crosses into Alcona County. The highway meets the eastern termini of F-30 and M-72 in Greenbush and Harrisville respectively. It also passes Harrisville State Park in the latter community. The highway shifts a bit further inland north of Harrisville, continuing to parallel the railroad through the Mackinaw State Forest. Near Ossineke, the trunkline turns back toward the lake, running along the shoreline of
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. When US 23 enters Alpena, it follows State Avenue through town and turns northwesterly on Chisholm Street. The intersections of Chisholm Street with Second and Third avenues mark the eastern terminus of M-32. Chisholm Street runs along the Thunder Bay River and crosses the river near Lake Besser. The highway leaves town and runs through rural woodlands to the south shore of Long Lake, curving around the eastern side of the lake. Near the northern end of the lake, US 23 crosses into Presque Isle County and runs along the west shore of Grand Lake. At the north end of that lake, the highway turns west along the Lake Huron shoreline near Thompson's Harbor State Park. The trunkline continues to Rogers City where it bypasses town to the south and west, intersecting F-21 and M-68 in the process; Bus. US 23 runs through downtown. On the other side of Rogers City, US 23 runs along the lake past Hoeft State Park and along Hammond Bay before crossing into Cheboygan County. This area had the lowest AADT levels in 2009 at 1,097 vehicles per day. US 23 follows the Lake Huron shoreline through Cheboygan County through woodlands past Cheboygan State Park and Duncan Bay. On the eastern edge of Cheboygan the highway intersects F-05 before following State Street through a commercial district. State Street crosses the
Cheboygan River The Cheboygan River ( ) is a river in the U.S. state of Michigan. The U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed November 21, 2011 river flows from Mullett Lake to Lake Huron, with ...
on the Cheboygan Bascule Bridge near the mouth of the river and the dock for the USCGC ''Mackinaw''. On the west side of the river, US 23 meets the northern terminus of M-27 at the intersection with Main Street. State Street continues westerly as C-66 as US 23 turns north on Main Street for a block before resuming west on Mackinaw Avenue. The highway continues along the lake toward Mackinaw City. As it approaches the village, it passes Historic Mill Creek State Park and several motels. At Nicolet Street in town, the highway crosses into Emmet County for the short distance to the highway's national northern terminus at I-75's exit 338.


History


Early history

Before Michigan became a state, the first land transportation corridors were the Indian trails. The original Shore Trail ran roughly parallel to the route of the modern-day US 23 from the Bay City area to Cheboygan. Another section of the current highway followed the Saginaw Trail between Flint and Saginaw. Later, during 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 ...
era, the modern-day US 23 also coincided with the east branch of the
Dixie Highway Dixie Highway was a United States auto trail first planned in 1914 to connect the Midwest with the South. It was part of a system and was expanded from an earlier Miami to Montreal highway. The final system is better understood as a network o ...
and part of the Lower Peninsula section of the Theodore Roosevelt International Highway. The Dixie Highway was created by William S. Gilbreath after he developed the
Lincoln Highway The Lincoln Highway is one of the first transcontinental highways in the United States and one of the first highways designed expressly for automobiles. Conceived in 1912 by Indiana entrepreneur Carl G. Fisher, and formally dedicated Octob ...
. The highway was designed to link the Great Lakes with the
Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
, and to commemorate a half century of peace between the North and the South after the
American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
. At the urging of Governor Woodbridge N. Ferris, the northern terminus was located at the Straits of Mackinac. The highway had two branches in the Lower Peninsula; the eastern branch followed what later became US 23 north of Standish. The Theodore Roosevelt International Highway was named for former US president
Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...
after his death in 1919. Overall, this highway ran from
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, to
Portland, Maine Portland is the List of municipalities in Maine, most populous city in the U.S. state of Maine and the county seat, seat of Cumberland County, Maine, Cumberland County. Portland's population was 68,408 at the 2020 census. The Portland metropolit ...
, by way of Michigan and the Canadian province of
Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...
. In Michigan, it also followed US 23 north of Standish.. The highway was also part of the East Michigan Pike, designed to be a counterpart of the West Michigan Pike on the other side of the Lower Peninsula. The original route of the East Michigan Pike included a section along the coast of
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 ...
between Bay City and Port Huron and used the same route as the Dixie Highway north of Bay City. Backers of this auto trail lost out in terms of name recognition to the Dixie Highway, relegating the East Michigan Pike to the list of failed auto trails.. The southern part of what is now US 23 in the state was also part of the auto trail craze. The Top of Michigan Trail was designated in 1917 from the state line north to the Bay City area, before turning inland along other roadways. The name faded from shortly after the time 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) assigned the first highway numbers in the state.. The first state highways along the US 23 corridor were numbered M-65 from the Ohio line north to the Flint area and M-10 from Flint north to Mackinaw City by July 1, 1919. When originally designated, M-65 was in two sections: the southern segment ran from the Ohio state line north to the Dundee area; the northern section ran between Ann Arbor and Flint by way of Brighton and Fenton. The gap between the two segments was eliminated by the middle of 1926.


United States Numbered Highways

US 23 was commissioned on November 11, 1926, with the debut of the United States Numbered Highway System. The MSHD removed the M-10 and M-65 designations from the highway at the time. As it was originally designated, US 23 crossed into Michigan from Ohio south of Temperance and ran north to Ypsilanti via Ida and Maybee. Once the highway entered Ann Arbor, it followed the roads that preceded the modern-day freeway up to Flint. From Flint to Saginaw, US 23 ran concurrently with US 10. On the way north to Bay City, the highway ran on the west side of the Saginaw River before turning north to the Standish area. From Standish to Mackinaw City, US 23 initially took a more inland route through the northeastern Lower Peninsula. Starting in 1929, MSHD started updating the route that US 23 followed through the Lower Peninsula. Late that year, the routing was moved to the east side of the Saginaw River, and M-47 was extended along the former course on the west side of the river. During 1930, a set of changes realigned the highway's route through the southeast corner of the state. Near Ida, US 23 was rerouted along M-50 to Dundee and north through Milan to Ann Arbor, bypassing Maybee and Whittaker. US 23 was moved from its inland routing between Omer and Tawas City via Whittemore to follow a shoreline alignment by way of Au Gres along Saginaw Bay around 1932; the former route through Twining and Whittemore became an extension of M-65 and the section from Whittemore east to Tawas City was added to M-55 as a part of these changes. In 1932, US 23 was moved closer to the lakeshore between
Spruce A spruce is a tree of the genus ''Picea'' ( ), a genus of about 40 species of coniferous evergreen trees in the family Pinaceae, found in the northern temperate and boreal ecosystem, boreal (taiga) regions of the Northern hemisphere. ''Picea'' ...
and Alpena; the former routing was redesignated M-171. The highway was also moved to a route closer to the lakeshore between Tawas City and Oscoda, with part of the old inland route taking the designation Old US 23. A few years later in 1936, US 23 replaced M-72 between Oscoda and Harrisville and followed a new roadway north to the Spruce area. The M-171 designation was removed from its original routing and applied to the 1932 routing of US 23 by way of Mikado and Lincoln. In the middle of 1937, US 27 was extended concurrently along US 23 between Cheboygan and Mackinaw City. Around the end of the decade, US 23's routing was moved in another location to follow the lakeshore; this time the highway was rerouted between Alpena and Rogers City. M-65 was extended northwards from Lachine through Posen to terminate over the former US 23 routing. US 23 was moved to its current lakeshore routing between Rogers City and Cheboygan in 1940, and M-33 was extended westerly from Onaway to Afton and north to Cheboygan over the former US 23 roadway while M-68 was extended eastward through Onaway to Rogers City. In early 1941, a bridge across the Saginaw River connecting Salzburg and Lafayette avenues in Bay City was added to the route of US 23 in the city; at the same time the former routing was redesignated Bus. US 23. The highway was also realigned between Hartland and Fenton in 1941. By 1945, the northernmost segment of M-65 in downtown Rogers City was redesignated Bus. US 23, and M-65 was truncated to its junction with US 23 southeast of town, removing the concurrency that existed since 1940. North of Dundee, a more direct alignment to Azalia was added to US 23, turning the former routing back to local control in late 1947 or early 1948; at the same time, the last gravel section of the highway was paved near Hammond Bay in northwestern Presque Isle County.


Freeway conversion

One of the first pieces of what would later become part of US 23's
freeway 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 ...
route was completed in late 1951 or early 1952, when a two-lane bypass was built around the eastern side of
Milan Milan ( , , ; ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban area and the List of cities in Italy, second-most-populous city proper in Italy after Rome. The city proper has a population of nea ...
. Two years later, a similar bypass was built from Bridgeport to M-81 on the east side of Saginaw, with the old route becoming a Bus. US 23 designation. Both bypasses would later be upgraded to four-lane freeways by 1961, with the Saginaw one later incorporated into the route of I-75. When the
Mackinac Bridge The Mackinac Bridge ( ; also referred to as the Mighty Mac or Big Mac) is a suspension bridge that connects the Upper Peninsula of Michigan, Upper and Lower Peninsula of Michigan, Lower peninsulas of the U.S. state of Michigan. It spans the Str ...
opened on November 1, 1957, US 23, US 27 and US 31 were extended along the access roadways to the foot of the bridge. The first future freeway portion of US 23 was built in 1957 from north of Ann Arbor to Whitmore Lake as a divided highway. On June 30, 1958, the first stretch of the "Fenton–Clio Expressway" opened, stretching from Fenton to Birch Run. The freeway connection from Dundee south to Ohio was opened on October 1, 1959. In late 1959, the portion from Flint to Birch Run also gained the I-75 designation. In late 1960 or early 1961, a new I-75/US 10/US 23 freeway was built from the north end of the Saginaw bypass to Kawkawlin, utilizing the Zilwaukee drawbridge (later replaced by the Zilwaukee Bridge) over the
Saginaw River The Saginaw River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed November 7, 2011 river in the U.S. state of Michigan. It is formed by the confluence of the Tittabawassee River, ...
; when it opened, MSHD extended M-13 along the former route of US 23 from the northside of Saginaw into Bay City to the end of the freeway at Kawkawlin. Another section connected the Whitmore Lake area with Brighton in the same timeframe.
General Motors General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing f ...
was bidding in 1961 to construct an electronic highway. US 23 between Ann Arbor and Toledo was under consideration to be the location of this project; the testing for such a roadway was ultimately done at
Ohio State University The Ohio State University (Ohio State or OSU) is a public university, public Land-grant university, land-grant research university in Columbus, Ohio, United States. A member of the University System of Ohio, it was founded in 1870. It is one ...
instead. By the end of the year, freeway sections opened to bypass Saginaw south and ran south to Birch Run, another connected south from Fenton to Hartland, and a third connected Milan with Dundee. The remaining gaps were eliminated with additional freeway openings in 1962: Brighton to Hartland opened in September, and Milan to Ann Arbor opened in November. The I-75/US 23 freeway north of the Kawkawlin area to Standish opened in 1967, and M-13 was shown on maps following US 23's former route through Linwood and Pinconning after the change. The MSHD requested additional Interstate Highway mileage in 1968 under the Federal-Aid Highway Act of 1968 including a freeway along US 23 between Standish and Mackinaw City. This extension was rejected by Congress on December 13, 1968; instead, Michigan was allotted additional mileage for an extension of I-69 to Flint. Once the last piece of I-75 was completed along the M-76 corridor in November 1973, the I-75 designation was extended north of Bay City on US 23. The MSHD first proposed a realignment of US 223 in 1965; this change would reroute that highway to replace M-151 in southern Monroe County, and use the US 23 freeway to connect to Sylvania, Ohio. The rerouting change was made in 1977 when Michigan shifted its segment of US 223 as proposed twelve years prior. Instead of running south through Ottawa Lake, US 223 continued east to the US 23 freeway and south into Ohio. The original bridge across the Saginaw River at Zilwaukee was built in 1960 as a
bascule bridge A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- o ...
to allow shipping traffic to use the river. Opening the drawbridge would back traffic up on I-75/US 10/US 23 for upwards of four hours on holiday weekends.. Approved in 1974, construction on the replacement bridge started in October 1979. A major construction accident in August 1982 delayed completion of the new Zilwaukee Bridge; a bridge pier partially collapsed when contractors overloaded a section under construction. The affected deck segment tilted to rest higher on one end and lower on the other. The structure was originally supposed to cost $76.8 million with a 1983 completion date; in the end it cost $131.3 million (equivalent to $ in ) when the southbound span finally opened on September 19, 1988. The structure is the largest segmental concrete bridge in the country. While that construction was being done, MDOT truncated US 10 at Bay City in 1986; this removed the concurrency between US 10 and US 23 that existed since 1926. A few years later in 1992, the freeway concept for the northeastern LP was revived again when MDOT initiated plans to study and build a new US 23 freeway from Standish northerly to Tawas City, Oscoda or Alpena. This proposal was brought up due to a high level of
tourist Tourism is travel for pleasure, and the commercial activity of providing and supporting such travel. UN Tourism defines tourism more generally, in terms which go "beyond the common perception of tourism as being limited to holiday activity on ...
traffic along the current routing since the mid-1960s. The FHWA mandated additional environmental studies for the project in 2000, and MDOT withdrew the proposals two years later. In November 2016, construction work on a $92 million project began on the freeway between Ann Arbor and Whitmore Lake. This construction includes replacement of bridges and reconstruction of off ramps. A year later, the flex route system opened, using intelligent traffic management and electronic signs to monitor and redirect traffic. The system can open a temporary travel lane on the inner shoulder during rush hour. The flex route project was nationally recognized by
American Association of State Highway and Transportation 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 A highway is any public or private road ...
(AASHTO) in 2018 for Operations Excellence. A $150 million extension to the interchange with I-96 is scheduled to begin in 2023 and be completed the following year. In March 2022, construction work began at the northern end of the freeway portion of US 23 just south of the city of Standish. This will remove a bridge and on-ramp at the end of the freeway, replacing it with a roundabout.


Future

Officials in the Flint area have proposed extending a freeway to directly connect I-475 to US 23. Such an extension, if built, would "include a new freeway coming out of I-475, which would snake across Fenton and Cook roads before connecting into US 23 at Baldwin Road". Proposals for the freeway connection have been around since the late 1990s, but they were indefinitely postponed in 2011.


Memorial highway designations and tourist routes

Most of US 23, along with US 2 in the
Upper Peninsula The Upper Peninsula of Michigan—also known as Upper Michigan or colloquially the U.P. or Yoop—is the northern and more elevated of the two major landmasses that make up the U.S. state of Michigan; it is separated from the Lower Peninsula b ...
, has been designated the United Spanish War Veterans Memorial Highway. The designation was conferred in Public Act 207 of 1945, with companion legislation for US 2 in 1949. Signs marking the highway were not erected until 1968 when Governor George W. Romney had them installed.. North of Standish, US 23 is a part of 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 ...
(LHCT). This tour was created in May 1986 as part of the overall Great Lakes Circle Tour through a joint effort between MDOT and its counterparts in
Wisconsin Wisconsin ( ) is a U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest of the United States. It borders Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michig ...
,
Minnesota Minnesota ( ) is a U.S. state, state in the Upper Midwestern region of the United States. It is bordered by the Canadian provinces of Manitoba and Ontario to the north and east and by the U.S. states of Wisconsin to the east, Iowa to the so ...
and
Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...
. When the Michigan State Legislature consolidated the statutes defining the various memorial highways in 2001, they included the Veterans of World War I Memorial Highway in the law. Defined along I-75/US 23 between Saginaw and Bay City, the designation was included in Public Act 142.. That act also affected another previously designated moniker between the two cities. The Roberts-Linton Highway was named in 1931 for local leaders who championed the construction of a highway along the
Saginaw River The Saginaw River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed November 7, 2011 river in the U.S. state of Michigan. It is formed by the confluence of the Tittabawassee River, ...
. This name was applied to the original highway routing between Saginaw and Bay City (now a part of M-13). After the 2001 change, the name was moved to the US 23 freeway.. In May 2004, the highway north of Standish was named the Sunrise Side Coastal Highway, a scenic highway designation through what is now called the
Pure Michigan Byway A Pure Michigan Byway is the designation for a segment of the Michigan State Trunkline Highway System, State Trunkline Highway System in the US state of Michigan that is a "scenic, recreational, or historic route that is representative of Michiga ...
Program. Since 2009, they local committee that manages the byway designation has started using the Huron Shores Heritage Route name for the corridor. At the end of 2011, the Northeast Michigan Council of Governments (NEMCOG) was working on funding a tourist promotion called "Telling Stories of the Sunrise Coast" through the US 23 Heritage Route Interpretive Program. Past efforts by NEMCOG included print media, logos, and other marketing efforts.


Historic bridges

MDOT maintains a listing of the historic bridges in the state; along US 23, the department has listed two structures. The bridge over the Ocqueoc River in Ocqueoc Township in Presque Isle County was built in 1937. The structure is one of the last three
deck truss bridge A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements, typically straight, may be stressed from tension, compression, or ...
s in the state.. The roadway on the bridge is wide and carries two lanes of traffic. The bridge was reconstructed in 1994. The second bridge is the Cheboygan Bascule Bridge in Cheboygan. This
bascule bridge A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- o ...
was built in 1940 over the Cheboygan River as the last of its kind before
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 ...
. It was built as a "two-leaf bridge in a place where a single-leaf bridge probably would have sufficed." The initial construction of the structure was delayed when the contractor died, but it was completed in December 1940. It was the second moveable bridge on the site, replacing an iron
swing bridge A swing bridge (or swing span bridge) is a movable bridge that can be rotated horizontally around a vertical axis. It has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravit ...
built in 1877. The structure is long, composed of two spans on either side of the central span; the roadway is wide with four lanes for vehicle traffic. There are also pedestrian sidewalks on either side of the roadway. When the bridge is opened to allow river traffic to pass, boats have a channel for navigation. The bridge was added to the
National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...
on December 1, 2000, and reconstructed in 2003.


Exit list


See also

* Business routes of U.S. Route 23 in Michigan


Notes


References


External links

*
US 23
at Michigan Highways

at Michigan Highways US 23
at Michigan Highway Ends * at CanHighways-->

at AARoads
Discover Heritage Route 23
(Northeast Michigan Council of Governments) {{DEFAULTSORT:US023 23 Lake Huron Circle Tour Freeways and expressways in Michigan Transportation in Monroe County, Michigan Transportation in Washtenaw County, Michigan Transportation in Genesee County, Michigan Transportation in Saginaw County, Michigan Transportation in Bay County, Michigan Transportation in Arenac County, Michigan Transportation in Iosco County, Michigan Transportation in Alcona County, Michigan Transportation in Alpena County, Michigan Transportation in Presque Isle County, Michigan Transportation in Cheboygan County, Michigan Transportation in Emmet County, Michigan Michigan