Corridor X shields along future Interstate 22 in Alabama

The Appalachian Development Highway System (ADHS) is a series of highway

corridor Corridor or The Corridor may refer to: Arts, entertainment, and media Films * ''The Corridor'' (1968 film), a 1968 Swedish drama film * ''The Corridor'' (1995 film), a 1995 Lithuanian drama film * ''The Corridor'' (2010 film), a 2010 Canadia ...

s in the

Appalachia Appalachia () is a cultural region in the Eastern United States that stretches from the Southern Tier of New York State to northern Alabama and Georgia. While the Appalachian Mountains stretch from Belle Isle in Newfoundland and Labrador, Ca ...

region of the eastern

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. The routes are designed as local and regional routes for improving economic development in the historically isolated region. It was established as part of the Appalachian Regional Development Act of 1965, and has been repeatedly supplemented by various federal and state legislative and regulatory actions. The system consists of a mixture of

state State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...

U.S. The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

, and

Interstate The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...

routes. The routes are formally designated as "corridors" and assigned a letter. Signage of these corridors varies from place to place, but where signed are often done so with a distinctive blue-colored sign. A 2019 study found that the construction of the ADHS led to economic net gains of $54 billion (approximately 0.4 percent of national income) and boosted incomes in the Appalachian region by reducing the costs of trade.

History

In 1964, the

President President most commonly refers to: *President (corporate title) *President (education), a leader of a college or university *President (government title) President may also refer to: Automobiles * Nissan President, a 1966–2010 Japanese ful ...

Appalachian Regional Commission The Appalachian Regional Commission (ARC) is a United States federal–state partnership that works with the people of Appalachia to create opportunities for self-sustaining economic development and improved quality of life. Congress established A ...

(PARC) reported to

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of a ...

that economic growth in

would not be possible until the region's isolation had been overcome. Because the cost of building highways through Appalachia's mountainous terrain was high, the region's local residents had never been served by adequate roads. The existing network of narrow, winding, two-lane roads, snaking through narrow stream valleys or over mountaintops, was slow to drive, unsafe, and in many places worn out. The nation's

Interstate Highway System The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...

, though extensive through the region, was designed to serve cross-country traffic rather than local residents. The PARC report and the Appalachian governors placed top priority on a modern highway system as the key to economic development. As a result, Congress authorized the construction of the Appalachian Development Highway System (ADHS) in the Appalachian Development Act of 1965. The ADHS was designed to generate economic development in previously isolated areas, supplement the interstate system, and provide access to areas within the region as well as to markets in the rest of the nation. Currently, the ADHS is authorized at , including added in January 2004 by Public Law 108–199. By the end of FY 2018, —approximately 90.5 percent of the authorized—were complete, open to traffic, or under construction. Many of the remaining miles will be among the most expensive to build.

Corridor Z State Route 520 (SR 520), also known as the South Georgia Parkway, is a state highway#United States, state highway in the southern part of the U.S. state of Georgia (U.S. state), Georgia. It travels from the Alabama state line, at the ...

across southern

Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...

is not part of the official system, but has been assigned by the

Georgia Department of Transportation The Georgia Department of Transportation (GDOT) is the organization in charge of developing and maintaining all state and federal roadways in the U.S. state of Georgia. In addition to highways, the department also has a limited role in developin ...

List of ADHS corridors

Corridor A

Corridor A is a

highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

in the states of

and

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...

. It travels from Interstate 285 (I-285) north of

Atlanta Atlanta ( ) is the capital and most populous city of the U.S. state of Georgia. It is the seat of Fulton County, the most populous county in Georgia, but its territory falls in both Fulton and DeKalb counties. With a population of 498,715 ...

northeasterly to

I-40 Interstate 40 (I-40) is a major east–west Interstate Highway running through the south-central portion of the United States. At a length of , it is the third-longest Interstate Highway in the country, after I-90 and I-80. From west to ea ...

near

Clyde, North Carolina Clyde is a town in Haywood County, North Carolina, United States. The 2010 census recorded the population at 1,223 people. It is part of the Asheville Metropolitan Statistical Area. History Prior to European colonization, the area that is now Cly ...

. I-40 continues easterly past

Asheville Asheville ( ) is a city in, and the county seat of, Buncombe County, North Carolina. Located at the confluence of the French Broad and Swannanoa rivers, it is the largest city in Western North Carolina, and the state's 11th-most populous cit ...

, where it meets I-26 and

Corridor B The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historica ...

. In Georgia, Corridor A travels along the State Route 400 (SR 400)

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 I-285 to the SR 141 interchange southwest of Cumming.Appalachian Development Highways Economic Impact Studies
, Chapter 3: Highway and Traffic Analysis From here to

Nelson Nelson may refer to: Arts and entertainment * ''Nelson'' (1918 film), a historical film directed by Maurice Elvey * ''Nelson'' (1926 film), a historical film directed by Walter Summers * ''Nelson'' (opera), an opera by Lennox Berkeley to a lib ...

, near the north end of I-575, Corridor A has not been constructed; its proposed path is near that of the cancelled Northern Arc. It begins again with a short piece of SR 372, becoming SR 515 when it meets I-575. SR 515 is a four-lane

divided highway A dual carriageway ( BE) or divided highway ( AE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are ...

all the way to Blairsville. From Blairsville to North Carolina, the corridor has not been built, and SR 515 is a two-lane road. The short North Carolina Highway 69 (NC 69) takes Corridor A north to U.S. Route 64 (US 64) near Hayesville. Corridor A turns east on US 64, and after some two-lane sections, it becomes a four-lane highway. Corridor A switches to US 23 near

Franklin Franklin may refer to: People * Franklin (given name) * Franklin (surname) * Franklin (class), a member of a historical English social class Places Australia * Franklin, Tasmania, a township * Division of Franklin, federal electoral d ...

, and meets the east end of

Corridor K The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historical ...

near Sylva. From Sylva to its end at I-40 near

Clyde Clyde may refer to: People * Clyde (given name) * Clyde (surname) Places For townships see also Clyde Township Australia * Clyde, New South Wales * Clyde, Victoria * Clyde River, New South Wales Canada * Clyde, Alberta * Clyde, Ontario, a tow ...

, Corridor A uses the

Great Smoky Mountains Expressway The Great Smoky Mountains Expressway is a four-lane divided highway that serves as the main east–west corridor through Southwestern North Carolina; connecting the towns of Bryson City, Sylva and Waynesville to Interstate 40. Its establishmen ...

, which carries US 23 most of the way and US 74 for its entire length.

Corridor A-1

Corridor A-1 uses US 19/ SR 400 from the point that Corridor A leaves it, at SR 141 near Cumming, northeast to SR 53 near

Bright Bright may refer to: Common meanings *Bright, an adjective meaning giving off or reflecting illumination; see Brightness *Bright, an adjective meaning someone with intelligence People * Bright (surname) * Bright (given name) *Bright, the stage na ...

. SR 400 continues northeast as a four-lane highway from SR 53 to SR 60 south of

Dahlonega The city of Dahlonega () is the county seat of Lumpkin County, Georgia, United States. As of the 2010 census, the city had a population of 5,242, and in 2018 the population was estimated to be 6,884. Dahlonega is located at the north end of ...

; this section was built "with APL funds as a local access road".

Corridor B

Corridor B is a

in the states of

Tennessee Tennessee ( , ), officially the State of Tennessee, is a landlocked state in the Southeastern region of the United States. Tennessee is the 36th-largest by area and the 15th-most populous of the 50 states. It is bordered by Kentucky to th ...

Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...

Kentucky Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illinois, Indiana, and Ohio to the north; West Virginia and Virginia to ...

, and

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

. It generally follows U.S. Route 23 (US 23) from Interstate 26 (I-26) and

near

Asheville, North Carolina Asheville ( ) is a city in, and the county seat of, Buncombe County, North Carolina. Located at the confluence of the French Broad and Swannanoa rivers, it is the largest city in Western North Carolina, and the state's 11th-most populous cit ...

, north to

Corridor C The Appalachian Development Highway System (ADHS) is a series of highway Transport corridor, corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic developme ...

north of

Portsmouth, Ohio Portsmouth is a city in and the county seat of Scioto County, Ohio, United States. Located in southern Ohio south of Chillicothe, it lies on the north bank of the Ohio River, across from Kentucky, just east of the mouth of the Scioto River. ...

. Corridor B uses I-240 from its south end into downtown Asheville, where it uses US 23 (current and future Interstate 26) to

Kingsport, Tennessee Kingsport is a city in Sullivan and Hawkins counties in the U.S. state of Tennessee. As of the 2020 census, its population was 55,442. Lying along the Holston River, Kingsport is commonly included in what is known as the Mountain Empire, w ...

. The US 23

ends at the Tennessee–Virginia state line, but US 23 is a four-lane

through Virginia and into northeastern Kentucky. At Greysbranch, Kentucky, Corridor B leaves US 23 to turn east on Kentucky Route 10 (KY 10) over the two-lane

Jesse Stuart Memorial Bridge The Jesse Stuart Memorial Bridge is a viaduct bridge on top of the Greenup Lock and Dam on the Ohio River. The bridge, named after author and Greenup County, Kentucky native Jesse Stuart, was completed in 1984 and carries Kentucky Route 10 (un ...

into Ohio. The short Ohio State Route 253 (OH 253) connects the bridge to US 52, a freeway that takes Corridor B north to

Wheelersburg Wheelersburg is a census-designated place (CDP) in Scioto County, Ohio, United States. It lies along the northern banks of the Ohio River in southern Ohio. Wheelersburg is approximately east of Portsmouth and west of Ironton. It is in Porte ...

. US 52 continues west to

Portsmouth Portsmouth ( ) is a port and city in the ceremonial county of Hampshire in southern England. The city of Portsmouth has been a unitary authority since 1 April 1997 and is administered by Portsmouth City Council. Portsmouth is the most dens ...

, the proposed alignment of Corridor B continues north and northwest along

Ohio State Route 823 State Route 823 (SR 823), officially known as the Southern Ohio Veterans Memorial Highway and colloquially as the Portsmouth Bypass, is a north–south four-lane divided controlled-access highway in Scioto County, Ohio. The highway, which run ...

to US 23 near Lucasville. The part of Corridor B north of SR 253 is also part of the I-73/74 North–South Corridor.

Corridor B-1

Corridor B-1 travels from KY 10 to the north end of the Portsmouth Bypass. In Kentucky, it follows US 23 and US 23 Truck; after crossing the two-lane

Carl Perkins Bridge The Carl D. Perkins Bridge is a cantilever bridge that spans the Ohio River between Washington Township, Scioto County, Ohio and South Portsmouth, Greenup County, Kentucky. The bridge carries the two lanes of State Route 852 and Truck Route U ...

into Ohio, it uses current and planned SR 852—a western bypass of Portsmouth—and US 23. Corridors B and B-1 both end near Lucasville, where

continues north along US 23 to

Columbus Columbus is a Latinized version of the Italian surname "''Colombo''". It most commonly refers to: * Christopher Columbus (1451-1506), the Italian explorer * Columbus, Ohio, capital of the U.S. state of Ohio Columbus may also refer to: Places ...

Corridor C

Corridor C is a

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...

. It is part of U.S. Route 23 (US 23), traveling from the north end of

near Lucasville north to Interstate 270 (I-270) south of

. , most of the road is a four-lane

, but there are a few gaps yet to be built. Corridor C is part of the

I-73 Interstate 73 (I-73) is a north–south Interstate Highway, located within the US state of North Carolina. Currently, there is one continuous section of I-73, totaling , first traversing the U.S. Route 220 (US 220) freeway from ...

I-74 } Interstate 74 (I-74) is an Interstate Highway in the Midwestern and Southeastern United States. Its western end is at an interchange with I-80 in Davenport, Iowa (Quad Cities); the eastern end of its Midwest segment is at an interchange ...

North–South Corridor.

Corridor C-1

Corridor C-1 is a connector from Corridor C near Chillicothe southeast to

Corridor D In the United States, Corridor D is part of the Appalachian Development Highway System. In Ohio, it follows State Route 32 from the eastern Cincinnati suburbs until a point west of Albany, where it becomes concurrent with U.S. Route 50. Afte ...

near

Jackson, Ohio Jackson is a city in and the county seat of Jackson County, Ohio, United States approximately 27 mi (43 km) SE of Chillicothe. The population was 6,239 at the 2020 census. History Established in 1817, residents named the to ...

, along US 35. It has been completed as a four-lane highway.

Corridor D

Corridor D travels east–west from Interstate 275 (I-275), near

Cincinnati Cincinnati ( ) is a city in the U.S. state of Ohio and the county seat of Hamilton County. Settled in 1788, the city is located at the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state line wit ...

, to

I-79 Interstate 79 (I-79) is an Interstate Highway in the eastern United States, designated from I-77 in Charleston, West Virginia, north to Pennsylvania Route 5 (PA 5) and PA 290 in Erie, Pennsylvania. It is a primary thoroughfare ...

, near

Bridgeport, West Virginia Bridgeport is a city in eastern Harrison County, West Virginia, United States. The population was 9,325 at the 2020 census. It is part of the Clarksburg micropolitan area. The town of Bridgeport had its beginning in pre-American Revolutionary W ...

. The corridor utilizes Ohio State Route 32 (SR 32) and U.S. Route 50 (US 50).

Corridor E

Interstate 68 (I-68) is a

Interstate highway The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...

in the

s of

West Virginia West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographers classify West Virginia as part of the Southern United States while the Bur ...

and

Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...

, connecting

in Morgantown to

I-70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from I-15 near Cove Fort, Utah, to a park and ride lot just east of I-695 in Baltimore, Maryland, and is the fifth-longest Interstate in the co ...

Hancock Hancock may refer to: Places in the United States * Hancock, Iowa * Hancock, Maine * Hancock, Maryland * Hancock, Massachusetts * Hancock, Michigan * Hancock, Minnesota * Hancock, Missouri * Hancock, New Hampshire ** Hancock (CDP), New Hampshir ...

. I-68 is also Corridor E of the Appalachian Development Highway System. From 1965 until the freeway's construction was completed in 1991, it was designated as U.S. Route 48 (US 48). In Maryland, the highway is known as the National Freeway, an homage to the historic

National Road The National Road (also known as the Cumberland Road) was the first major improved highway in the United States built by the Federal Government of the United States, federal government. Built between 1811 and 1837, the road connected the Pot ...

, which I-68 parallels between Keysers Ridge and

. The freeway mainly spans rural areas, and crosses numerous mountain ridges along its route. A

road cut In civil engineering, a cut or cutting is where soil or rock from a relative rise along a route is removed. The term is also used in river management to speed a waterway's flow by short-cutting a meander. Cuts are typically used in road, rail, ...

constructed for it through

Sideling Hill Sideling Hill, also Side Long Hill, is a long, steep, narrow mountain ridge in the Ridge-and-Valley (or Allegheny Mountains) physiographic province of the Appalachian Mountains, located in Washington County in western Maryland and adjacent West ...

exposed geological features of the mountain and has become a tourist attraction. US 219 and US 220 travel concurrently with I-68 in

Garrett County Garrett County () is the westernmost county of the U.S. state of Maryland. As of the 2020 census, the population was 28,806, making it the third-least populous county in Maryland. Its county seat is Oakland. The county was named for John Work ...

and

Cumberland, Maryland Cumberland is a U.S. city in and the county seat of Allegany County, Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its s ...

, respectively, and US 40 overlaps with the freeway from Keysers Ridge to the eastern end of the freeway at Hancock. The construction of I-68 began in 1965 and lasted for about 25 years, being completed on August 2, 1991. While the road was being built, it was predicted that the completion of the road would improve the economic situation along the corridor. The two largest cities connected by the highway are Morgantown and Cumberland, both with populations of fewer than 30,000 people. Despite the fact that the freeway serves no large metropolitan areas, I-68 provides a major transportation route in western Maryland and northern West Virginia and also provides an alternative to the

Pennsylvania Turnpike The Pennsylvania Turnpike (Penna Turnpike or PA Turnpike) is a toll highway operated by the Pennsylvania Turnpike Commission (PTC) in the U.S. state of Pennsylvania. A controlled-access highway, it runs for across the state. The turnpike's we ...

for westbound traffic from

Washington, D.C. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...

and

Baltimore Baltimore ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by popula ...

. There have been several major planned road projects that would affect the freeway's corridor, which, due to major funding issues, are unlikely to be completed. These include a plan to extend I-68 to

Moundsville, West Virginia Moundsville is a city in Marshall County, West Virginia, United States, along the Ohio River. It is part of the Wheeling, West Virginia metropolitan area. The population was 8,122 at the 2020 census. It is the county seat of Marshall County. Th ...

, and the plan to link the

Mon–Fayette Expressway The Mon–Fayette Expressway is a partially-completed tolled freeway that is planned to eventually link Interstate 68 near Morgantown, West Virginia with Interstate 376 near Monroeville, Pennsylvania. The ultimate goal of the highway is to pr ...

, a

toll highway A toll road, also known as a turnpike or tollway, is a public or private road (almost always a controlled-access highway in the present day) for which a fee (or ''toll'') is assessed for passage. It is a form of road pricing typically implemented ...

which meets I-68 east of Morgantown, to

Pittsburgh Pittsburgh ( ) is a city in the Commonwealth (U.S. state), Commonwealth of Pennsylvania, United States, and the county seat of Allegheny County, Pennsylvania, Allegheny County. It is the most populous city in both Allegheny County and Wester ...

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

Corridor F

Corridor F is a

in the

s of

and

. It travels from Interstate 75 (I-75) in

Caryville, Tennessee Caryville is a town in Campbell County, Tennessee, United States. The population was 2,297 at the 2010 census. History Originally known as Wheeler's Station, the town was renamed in honor of Judge William Carey, a prominent local landowner, in ...

, northeasterly to

( U.S. Route 23 (US 23)) near

. Corridor F uses US 25W and Tennessee State Route 63 (SR 63) from I-75 to

Corridor S S, or s, is the nineteenth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''ess'' (pronounced ), plural ''esses''. History ...

( US 25E) in

Harrogate, Tennessee Harrogate is the largest city in Claiborne County, Tennessee, United States. It is adjacent to Cumberland Gap National Historical Park. The community has been known as "Harrogate" since the 19th century, but did not incorporate by that name un ...

. There, it turns northwest along US 25E, passing through the

Cumberland Gap Tunnel The Cumberland Gap Tunnel is a dual-bore, four lane vehicular tunnel that carries U.S. Route 25E under Cumberland Gap National Historical Park near the intersection of Kentucky, Tennessee, and Virginia. The tunnel consists of two separate bor ...

into Kentucky. It leaves US 25E in

Pineville, Kentucky Pineville () is a home rule-class city in Bell County, Kentucky, United States. It is the seat of its county. The population was 1,732 as of the 2010 census. It is located on a small strip of land between the Cumberland River and Pine Mountain ...

, turning northeasterly along US 119, past an intersection with

Corridor I The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historica ...

( Kentucky Route 15 (KY 15)) in Whitesburg, to its end at Corridor B.

Corridor G

Corridor G is a

in the

s of

and

that follows the route of U.S. Route 119 (US 119) from

Pikeville, Kentucky Pikeville () is a city in and the county seat of Pike County, Kentucky, United States. During the 2020 United States census, 2020 U.S. Census, the population within Pikeville's city limits was 7,754. In Kentucky's current city classification sys ...

, to

Charleston, West Virginia Charleston is the capital and List of cities in West Virginia, most populous city of West Virginia. Located at the confluence of the Elk River (West Virginia), Elk and Kanawha River, Kanawha rivers, the city had a population of 48,864 at the 20 ...

. Construction on the road began in 1972 in West Virginia and 1974 in Kentucky, but it was more than two decades before the road was completed in either state. The full length of Corridor G in West Virginia was completed in 1997, but Kentucky's last segment was not opened until 2008.

Corridor H

Corridor H is a

in the

s of

and

. It travels from

Weston Weston may refer to: Places Australia * Weston, Australian Capital Territory, a suburb of Canberra * Weston, New South Wales * Weston Creek, a residential district of Canberra * Weston Park, Canberra, a park Canada * Weston, Nova Scotia * W ...

, West Virginia to Strasburg, Virginia. In December 1999, a settlement agreement was reached, providing the framework for resumption of final design, right-of-way acquisition and construction activities on the Corridor H highway project. Corridor H is the only corridor highway that remains incomplete in the State of West Virginia. It begins at

in Weston and will end at

I-81 Interstate 81 (I-81) is a north–south (physically northeast–southwest) Interstate Highway in the eastern part of the United States. Its southern terminus is at I-40 in Dandridge, Tennessee; its northern terminus is on Wellesley Isla ...

in Strasburg when complete. Virginia's portion of Corridor H runs from the West Virginia state line to I-81 at Strasburg, Virginia. The building of Corridor H was controversial, arousing strong passions for and against. Decades of public debate and legal battles aired the essential question of whether previously isolated areas should be preserved or opened to development. Despite the controversy, about 75 percent of the highway had been completed as of 2013. The highway is open from the Weston exit of I-79 to Kerens,

Randolph County Randolph County is the name of eight counties in the United States: *Randolph County, Alabama *Randolph County, Arkansas *Randolph County, Georgia *Randolph County, Illinois *Randolph County, Indiana *Randolph County, Missouri *Randolph County, Nort ...

and an additional section of the four-lane is open from the

Grant Grant or Grants may refer to: Places *Grant County (disambiguation) Australia * Grant, Queensland, a locality in the Barcaldine Region, Queensland, Australia United Kingdom *Castle Grant United States * Grant, Alabama *Grant, Inyo County, C ...

Tucker Tucker may refer to: Places United States * Tucker, Arkansas * Tucker, Georgia * Tucker, Mississippi * Tucker, Missouri * Tucker, Utah, ghost town * Tucker County, West Virginia Outer space * Tucker (crater), a small lunar impact crater in the s ...

county line to Wardensville as of July 2016.

Corridor I

Corridor I is a

in the

. It travels from

Interstate 64 Interstate 64 (I-64) is an east–west Interstate Highway in the Eastern United States. Its western terminus is at I-70, US Route 40 (US 40), and US 61 in Wentzville, Missouri. Its eastern terminus is at an interchange w ...

(I-64) southeasterly along the

Mountain Parkway The Bert T. Combs Mountain Parkway, commonly known as the Mountain Parkway, is a freeway in eastern Kentucky. The route runs from Interstate 64 just east of Winchester southeast for 75.627 miles (121.710 km) to a junction with U.S. Route ...

and Kentucky Route 15 (KY 15) to

Corridor F The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historical ...

( U.S. Route 119 (US 119)) in Whitesburg. Corridor I meets

Corridor R The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historica ...

(Mountain Parkway) near Campton and

Hal Rogers Parkway The Hal Rogers Parkway, formerly named the Daniel Boone Parkway, connects Somerset and Hazard in southeastern Kentucky. This toll road opened in November 1971, and the tolls were removed June 1, 2003. The original extent of the highway was t ...

and KY 80 in

Hazard A hazard is a potential source of harm Harm is a moral and legal concept. Bernard Gert construes harm as any of the following: * pain * death * disability * mortality * loss of abil ity or freedom * loss of pleasure. Joel Feinberg giv ...

Corridor J

Corridor J is a

in the

s of

and

. It travels from the end of Interstate 24 (I-24) in

Chattanooga, Tennessee Chattanooga ( ) is a city in and the county seat of Hamilton County, Tennessee, United States. Located along the Tennessee River bordering Georgia, it also extends into Marion County on its western end. With a population of 181,099 in 2020, ...

, north to

I-75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from St ...

London, Kentucky London is a home rule-class city in Laurel County, Kentucky, in the United States. It is the seat of its county. The population was 7,993 at the time of the 2010 census. It is the second-largest city named "London" in the United States and the ...

. Corridor J uses U.S. Route 27 (US 27) from Chattanooga north to Soddy-Daisy. There it turns northwest on State Route 111 (SR 111), eventually curving to the north via Dunlap,

Sparta Sparta ( Doric Greek: Σπάρτα, ''Spártā''; Attic Greek: Σπάρτη, ''Spártē'') was a prominent city-state in Laconia, in ancient Greece. In antiquity, the city-state was known as Lacedaemon (, ), while the name Sparta referre ...

, and

Cookeville Cookeville is the county seat and largest city of Putnam County, Tennessee, United States. As of the 2020 United States census, its population was reported to be 34,842. It is recognized as one of the country's micropolitan areas, or smaller ...

Livingston Livingston may refer to: Businesses * Livingston Energy Flight, an Italian airline (2003–2010) * Livingston Compagnia Aerea, an Italian airline (2011–2014), also known as Livingston Airline * Livingston International, a North American custom ...

. Then it turns northwest on SR 52 to Celina and northeast on SR 53 to Kentucky. Upon crossing into Kentucky, Corridor J becomes Kentucky Route 61 (KY 61), heading north to Burkesville. There it turns east on KY 90, which it follows to Burnside. Corridor J turns north on US 27 at Burnside, quickly turning northeast on KY 914 to bypass downtown

Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...

and then east on KY 80 to

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

. Listed in a US House of Representatives Report in 2002, was a proposed feasibility and the planning study to establish I-175 along Corridor J. However, no allocation of monies was appropriated and no additional discussion has been made since for this briefly proposed interstate along the corridor. Until late 2005, Corridor J was to turn west just north of Cookeville along the planned SR 451 to SR 56 north of Baxter and then use SR 56 and SR 53 via Gainesboro.

Corridor J-1

Corridor J-1 runs from Algood west to SR 56, then north to Celina via SR 53 and Gainesboro; it is proposed that the part of the corridor be renumbered as SR 451. The corridor serves as an alternate route for Corridor J, avoiding

. The entire route is two-lane with wide shoulders, allowing for possible expansion if needed.

Corridor K

Corridor K is a

in the

s of

and

. Overlapped entirely by

U.S. Route 74 U.S. Route 74 (US 74) is an east–west United States highway that runs for from Chattanooga, Tennessee to Wrightsville Beach, North Carolina. Primarily in North Carolina, it serves as an important highway from the mountains to the ...

(US 74), it also shorter concurrences with US 19, US 64,

APD-40 APD-40 or APD 40 refers to a road composed of the U.S. Route 64 Bypass (US 64 Byp.) and a section of State Route 60 (SR 60) which forms a partial beltway around the business district of Cleveland, Tennessee. The route takes its name ...

(US 64 Bypass) US 129 and US 441. The corridor connects Interstate 75 (I-75) in

Cleveland, Tennessee Cleveland is the county seat of and largest city in Bradley County, Tennessee, United States. The population was 47,356 at the 2020 census. It is the principal city of the Cleveland metropolitan area, Tennessee (consisting of Bradley and neigh ...

(northeast of

Chattanooga Chattanooga ( ) is a city in and the county seat of Hamilton County, Tennessee, United States. Located along the Tennessee River bordering Georgia, it also extends into Marion County on its western end. With a population of 181,099 in 2020, ...

), easterly to

Corridor A The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historic ...

( US 23) near

Dillsboro, North Carolina Dillsboro is a town in Jackson County, North Carolina, United States. The population was 232 at the 2010 census. Dillsboro attracts tourists traveling to the Great Smoky Mountains. The Great Smoky Mountains Railroad begins in Dillsboro and foll ...

There are two gaps in the corridor, one in each state. The gap in Tennessee is the

Ocoee Scenic Byway The Ocoee Scenic Byway is a National Forest Scenic Byway and Tennessee Scenic Byway that traverses through the Cherokee National Forest, in East Tennessee. It is part of both U.S. Route 64 in Tennessee, U.S. Route 64 and U.S. Route 74, and featu ...

along the

Ocoee River The Toccoa River and Ocoee River are the names in use for a single river that flows northwestward through the southern Appalachian Mountains of the southeastern United States. It is a tributary of the Hiwassee River, which it joins in Polk Coun ...

from Parksville to Ducktown. Plans outline a new alternate route for this section since the current route does not meet the purpose and need to support the regional transportation goals of a safe, reliable and efficient east–west route. Currently in environmental study, a record of decision is expected in 2017. The gap in North Carolina is located from Andrews to Stecoah. Broken in three projects, the plan outlines a new four-lane

expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...

that will bypass north of the

Nantahala Gorge The Nantahala River ()
, from the North Carolina Collection's website at the

Robbinsville. At a total cost to NCDOT estimated at $443 million, it is currently in reprioritization. Since the corridor's establishment, the first major improvement for the corridor happened in 1979, when bypasses were completed for

Murphy Murphy () ( ga, Ua Murchadha) is an Irish surname and the most common surname in the Republic of Ireland. Origins and variants The surname is a variant of two Irish surnames: "Ó Murchadha"/"Ó Murchadh" (descendant of "Murchadh"), and "Mac ...

and Andrews. In 1986, US 74 was extended west from

, overlapping all of Corridor K. Its last major improvement was in 2005, with the widening of NC 28 at Stecoah, first completed section Nantahala Gorge bypass. Now at 74.8% of the corridor completed, it features four-lane divided highway predominantly expressway grade, with sections in and around

Cleveland Cleveland ( ), officially the City of Cleveland, is a city in the U.S. state of Ohio and the county seat of Cuyahoga County. Located in the northeastern part of the state, it is situated along the southern shore of Lake Erie, across the U.S. ...

Cherokee The Cherokee (; chr, ᎠᏂᏴᏫᏯᎢ, translit=Aniyvwiyaʔi or Anigiduwagi, or chr, ᏣᎳᎩ, links=no, translit=Tsalagi) are one of the indigenous peoples of the Southeastern Woodlands of the United States. Prior to the 18th century, t ...

and Dillsboro at freeway grade. The corridor also connects the cities of Ducktown and

Bryson City Bryson City is a town in Swain County, North Carolina, Swain County, North Carolina in the United States. The population was 1558 as of the 2020 Census. It is the county seat of Swain County. Located in what was historically the land of the Cherok ...

, and features the Ocoee National Forest Scenic Byway, in Tennessee, and the Nantahala Byway, in North Carolina; treating travelers with grand vistas and various recreational activities.

Corridor L

Corridor L is a

in the

. It follows the path of U.S. Route 19 (US 19) between Beckley and

Sutton Sutton (''south settlement'' or ''south town'' in Old English) may refer to: Places United Kingdom England In alphabetical order by county: * Sutton, Bedfordshire * Sutton, Berkshire, a List of United Kingdom locations: Stu-Sz#Su, location * S ...

. By exiting onto Corridor L from Interstate 79 (I-79) at milepost 57, a southbound traveler can eliminate , and $7.75 in tolls, re-entering the interstate system at the

West Virginia Turnpike West or Occident is one of the four cardinal directions or points of the compass. It is the opposite direction from east and is the direction in which the Sun sets on the Earth. Etymology The word "west" is a Germanic word passed into some R ...

(

I-64 Interstate 64 (I-64) is an east–west Interstate Highway in the Eastern United States. Its western terminus is at I-70, U.S. Route 40 (US 40), and US 61 in Wentzville, Missouri. Its eastern terminus is at an interchange w ...

and

I-77 Interstate 77 (I-77) is a north–south Interstate Highway in the eastern United States. It traverses diverse terrain, from the mountainous state of West Virginia to the rolling farmlands of North Carolina and Ohio. It largely supplants the ...

) at milepost 48. Originally, this corridor was built as a four-lane

for only the portion south of US 60; however, the large amount of traffic (as part of the direct route from the cities of

Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the ancho ...

, Buffalo, and

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...

and a considerable portion of the Atlantic southeast) forced the state to rethink this plan and upgrade the northern half to four lanes as well.

Corridor M

Corridor M is a

in the

. It follows

Pennsylvania Route 66 Pennsylvania Route 66 (PA 66) is a state highway in Western Pennsylvania. Its southern terminus is at U.S. Route 119 (US 119) just east of Interstate 70 (I-70) near New Stanton. Its northern terminus is at US 6 in Kane. The southernmost ...

from

Interstate 76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular ...

near

New Stanton New Stanton is a borough in Westmoreland County, Pennsylvania, United States. The population was 2,173 at the 2010 census. New Stanton is often used as a control city in western parts of Pennsylvania, as I-70 joins the Pennsylvania Turnpike (I-76) ...

to an intersection near Delmont, where it follows

U.S. Route 22 U.S. Route 22 (US 22) is a west–east route and is one of the original United States highways of 1926, running from Cincinnati, Ohio, at US 27, US 42, US 127, and US 52 to Newark, New Jersey, at U.S. Route 1/9 in the Newark Airport Interchange ...

until the

Interstate 81 Interstate 81 (I-81) is a north–south (physically northeast–southwest) Interstate Highway in the eastern part of the United States. Its southern terminus is at I-40 in Dandridge, Tennessee; its northern terminus is on Wellesley Island ...

interchange near

Harrisburg Harrisburg is the capital city of the Pennsylvania, Commonwealth of Pennsylvania, United States, and the county seat of Dauphin County, Pennsylvania, Dauphin County. With a population of 50,135 as of the 2021 census, Harrisburg is the List of c ...

. A large portion near the center of the route has not yet been upgraded to a four-lane divided highway. Projects currently under way in Pennsylvania include: * A location study on a section to provide four lanes between

Hollidaysburg Hollidaysburg is a borough in and the county seat of Blair County in the U.S. state of Pennsylvania. It is located on the Juniata River, south of Altoona and is part of the Altoona, Pennsylvania, metropolitan statistical area. In 1900, 2,998 ...

and Lewistown

Corridor N

Corridor N is a

in the

s of

and

. It is a designated portion of U.S. Route 219 (US 219), traveling from

Corridor E Interstate 68 (I-68) is a Interstate Highway in the US states of West Virginia and Maryland, connecting I-79 in Morgantown, West Virginia, to I-70 in Hancock, Maryland. I-68 is also Corridor E of the Appalachian Development Highway Syst ...

(

I-68 Interstate 68 (I-68) is a Interstate Highway in the US states of West Virginia and Maryland, connecting I-79 in Morgantown, West Virginia, to I-70 in Hancock, Maryland. I-68 is also Corridor E of the Appalachian Development Highway Syst ...

/ US 40) near

Grantsville, Maryland Grantsville is a town in the northern part of Garrett County, Maryland, United States, near the Pennsylvania border. The population was 968 as of the 2020 census. History Grantsville, half a mile west of the Casselman River, began as a small Amis ...

, north to

Corridor M The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historical ...

( US 22 near

Ebensburg, Pennsylvania Ebensburg is a borough and the county seat of Cambria County in the U.S. state of Pennsylvania. It is located west of Altoona and surrounded by Cambria Township. It is situated in the Allegheny Mountains at about above sea level. Ebensburg is ...

). There is currently an attempt in the

U.S. House of Representatives The United States House of Representatives, often referred to as the House of Representatives, the U.S. House, or simply the House, is the lower chamber of the United States Congress, with the Senate being the upper chamber. Together they ...

to extend this corridor, in the form of House bill H.R.1544 - Corridor N Extension Act of 2011. The act would extend Corridor N north from its current terminus at Corridor M to

Corridor T Corridor or The Corridor may refer to: Arts, entertainment, and media Films * ''The Corridor'' (1968 film), a 1968 Swedish drama film * ''The Corridor'' (1995 film), a 1995 Lithuanian drama film * ''The Corridor'' (2010 film), a 2010 Canadia ...

in southwestern

New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

. The bill has not yet been brought before Congress for debate. As of January 2019, Corridor N has been completed as a

controlled-access highway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

from just north of Ebensburg to Meyersdale. In late 2021 Maryland opened a 1.2 mi four-lane bypass of the prior US 219 at the Corridor E (I-68) interchange; the remainder of the route to Meyersdale remains a two-lane highway.

Corridor O

Corridor O is a

in the

s of

and

. It is part of U.S. Route 220 (US 220), traveling from Corridor E, near

, north to

I-80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one o ...

, near

Bellefonte, Pennsylvania Bellefonte is a borough in, and the county seat of, Centre County in the U.S. state of Pennsylvania. It is approximately twelve miles northeast of State College and is part of the State College, Pennsylvania Metropolitan Statistical Area. The boro ...

. The part north of the

(

I-76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular ...

) near

Bedford Bedford is a market town in Bedfordshire, England. At the 2011 Census, the population of the Bedford built-up area (including Biddenham and Kempston) was 106,940, making it the second-largest settlement in Bedfordshire, behind Luton, whilst ...

is also I-99.

Corridor O-1

Corridor O-1 begins at Corridor O at

Port Matilda, Pennsylvania Port Matilda is a borough in Centre County, Pennsylvania. It is part of the State College, Pennsylvania metropolitan statistical area and is located approximately halfway between State College and Altoona. The population was 606 at the 2010 censu ...

, and travels northwesterly along US 322 to

near Clearfield.

Corridor P

Corridor P is a

in the

. It travels from a point near Mackeyville, eastward to

Milton Milton may refer to: Names * Milton (surname), a surname (and list of people with that surname) ** John Milton (1608–1674), English poet * Milton (given name) ** Milton Friedman (1912–2006), Nobel laureate in Economics, author of '' Free t ...

, via Williamsport.

Corridor P-1

Corridor P-1 begins at

( US 22/ US 322) near

Duncannon Duncannon () is a village in southwest County Wexford, Ireland. Bordered to the west by Waterford harbour and sitting on a rocky headland jutting into the channel is the strategically prominent Duncannon Fort which dominates the village. Pri ...

and travels north for along US 11/

US 15 U.S. Route 15 (US 15) is a -long United States highway, designated along South Carolina, North Carolina, Virginia, Maryland, Pennsylvania, and New York. The route is signed north–south, from U.S. Route 17 Alternate in Walterboro, South Car ...

and PA 147, meeting Corridor P at the interchange of

Interstate 80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one o ...

and I-180 near

.ADHS Approved Corridors and Termini
/ref> The majority of the corridor's length from its southern terminus to Selinsgrove is a four-lane divided highway carrying the US 11 and US 15 designations. The northernmost of this section is a freeway bypassing Selinsgrove. The next is an unbuilt freeway named the

Central Susquehanna Valley Thruway The Central Susquehanna Valley Thruway (CSVT), also known as the Central Susquehanna Valley Transportation Project, is a partially-completed bypass (road), highway bypass along the U.S. Route 15 in Pennsylvania, U.S. Route 15 (US 15) corrid ...

(CSVT), which will partially be designated US 15 and PA 147. Construction began on the northern half of the CSVT in 2016. The remaining of Corridor P-1 from the CSVT to I-80 and Corridor P is a four-lane freeway section of PA 147.

Corridor Q

Corridor Q is a

in the

s of

, and

. It travels from US 23/ US 119, near

, to Interstate 81, in

Christiansburg, Virginia Christiansburg (formerly Hans Meadows) is a town in Montgomery County, Virginia, United States. The population was 21,041 at the 2010 census. It is the county seat of Montgomery County. Christiansburg, Blacksburg and the city of Radford are th ...

. In the 2013 fiscal year, the corridor is 82.2% completed.

Corridor R

Corridor R is a

in the

. It travels from

at the interchange of the

and Kentucky Route 15 (KY 15) near Campton east along the Mountain Parkway and KY 114 to

( US 23/ US 460) in Prestonsburg. It forms part of a route from

Lexington, Kentucky Lexington is a city in Kentucky, United States that is the county seat of Fayette County, Kentucky, Fayette County. By population, it is the List of cities in Kentucky, second-largest city in Kentucky and List of United States cities by popul ...

Roanoke, Virginia Roanoke ( ) is an independent city in the U.S. state of Virginia. At the 2020 census, the population was 100,011, making it the 8th most populous city in the Commonwealth of Virginia and the largest city in Virginia west of Richmond. It is lo ...

using

(I-64),

, Corridor R,

Corridor Q Corridor Q is a highway in the U.S. states of Kentucky, Virginia, and West Virginia. It is part of the Appalachian Development Highway System and U.S. Route 460. Corridor Q runs from Corridor B (US 23/US 119) near Pikeville, Kentucky easterly ...

, and

Corridor S

Corridor S is a

in the

. It is routed entirely along U.S. Route 25E (US 25E); from Interstate 81 (I-81), near Morristown, to State Route 63 (SR 63; Corridor F), in

Harrogate Harrogate ( ) is a spa town and the administrative centre of the Borough of Harrogate in North Yorkshire, England. Historic counties of England, Historically in the West Riding of Yorkshire, the town is a tourist destination and its visitor at ...

. In the 2013 fiscal year, has been completed, while remains to be constructed, which consists of

rest area A rest area is a public facility located next to a large thoroughfare such as a motorway, expressway, or highway, at which drivers and passengers can rest, eat, or refuel without exiting onto secondary roads. Other names include motorway servi ...

s and design and construction of

interchanges Interchange may refer to: Transport * Interchange (road), a collection of ramps, exits, and entrances between two or more highways * Interchange (freight rail), the transfer of freight cars between railroad companies * Interchange station, a rai ...

to meet interstate standards.

Corridor T

Corridor T is a

in the

s of

and

. It travels from Greenfield Township, Pennsylvania (northeast of

Erie Erie (; ) is a city on the south shore of Lake Erie and the county seat of Erie County, Pennsylvania, United States. Erie is the fifth largest city in Pennsylvania and the largest city in Northwestern Pennsylvania with a population of 94,831 a ...

) to

Windsor, New York Windsor is a town in Broome County, New York, United States. The population was 5,804 at the 2020 census. The town is on the southern border of the county and is east of Binghamton. The town includes the village of Windsor, located on the Susqu ...

, and corresponds to Interstate 86, an upgrade of the existing

New York State Route 17 New York State Route 17 (NY 17) is a major state highway that extends for through the Southern Tier and Downstate regions of New York in the United States. It begins at the Pennsylvania state line in Mina and follows the Southern T ...

(NY 17). An extension of the US 219 Southern Expressway will also join I-86. Known as the Southern Tier Expressway and Quickway (split by Interstate 81 (I-81) at

Binghamton, New York Binghamton () is a city in the U.S. state of New York, and serves as the county seat of Broome County. Surrounded by rolling hills, it lies in the state's Southern Tier region near the Pennsylvania border, in a bowl-shaped valley at the conflue ...

), I-86 will connect

I-90 Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and ...

northeast of Erie, with

I-87 Interstate 87 may refer to either of two unconnected Interstate Highways in the United States: * Interstate 87 (New York), a highway running from New York City north to the Canadian border in Champlain, New York. * Interstate 87 (North Carolina) ...

(the

New York State Thruway {{Infobox road , state = NY , type = NYST , alternate_name = Governor Thomas E. Dewey Thruway , maint = NYSTA , map = {{maplink, frame=yes, plain=yes, frame-align=center, frame-width=290, type=line, stroke-width=2, type2=line, from2=New Yor ...

) near

Harriman, New York Harriman is a village in Orange County, New York, United States. It is in the southeastern section of the town of Monroe, with a small portion in the town of Woodbury. The population was 2,424 at the 2010 census. It is part of the Poughkeepsie&nda ...

. As of August 2008, it travels east from I-90 to NY 352 in Elmira, bringing the total length of highway designated as I-86 to (and remaining to be designated). Once completed, I-86 will stretch 388 miles (624 km) across the

Southern Tier of New York The Southern Tier is a geographic subregion of the broader Upstate New York region of New York State, consisting of counties west of the Catskill Mountains in Delaware County and geographically situated along or very near the northern border ...

from I-90 to I-87,

MapQuest MapQuest (stylized as mapquest) is an American free online web mapping service. It was launched in 1996 as the first commercial web mapping service. MapQuest vies for market share with competitors such as Google Maps and Here. History MapQuest's ...

driving directions
part 1
an
part 2
/ref> shorter than the along the

to the north. Several sections of NY 17 are not up to

Interstate Highway standards Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials (AASHTO) in the publication ''A Policy on Design Standards: Interstate System''. For a certain highway to ...

, and need to be upgraded before I-86 can be designated along its full length. These substandard sections are located near Elmira, Binghamton, and the

Catskill Mountains The Catskill Mountains, also known as the Catskills, are a physiographic province of the larger Appalachian Mountains, located in southeastern New York. As a cultural and geographic region, the Catskills are generally defined as those areas c ...

. I-86 currently travels in

and in

. Except for a section of about that dips into Pennsylvania near Waverly, New York but is maintained by the

New York State Department of Transportation The New York State Department of Transportation (NYSDOT) is the department of the New York state government responsible for the development and operation of highways, railroads, mass transit systems, ports, waterways and aviation facilities in ...

, the rest of I-86 will be in New York.

Corridor U

Corridor U is a

in the

s of

and

. It begins at Corridor P ( U.S. Route 220 (US 220)) near

Williamsport, Pennsylvania Williamsport is a city in, and the county seat of, Lycoming County, Pennsylvania, United States. It recorded a population of 27,754 at the 2020 Census. It is the principal city of the Williamsport Metropolitan Statistical Area, which has a popula ...

, and proceeds generally northward to Corridor T ( Interstate 86 (I-86)) in

Elmira, New York Elmira () is a city and the county seat of Chemung County, New York, United States. It is the principal city of the Elmira, New York, metropolitan statistical area, which encompasses Chemung County. The population was 26,523 at the 2020 cens ...

. The corridor follows

northward from Williamsport to Tioga Junction, where it turns northeastward to follow Pennsylvania Route 328 (PA 328),

New York State Route 328 New York State Route 328 (NY 328) is a northeast–southwest state highway located entirely within the town of Southport in Chemung County, New York, in the United States. The northeast end of NY 328 is at an intersection with NY&n ...

(NY 328), and

New York State Route 14 New York State Route 14 (NY 14) is a state highway located in western New York in the United States. Along with NY 19, it is one of two routes to transect the state in a north–south fashion between the Pennsylvania border an ...

(NY 14) through Elmira to I-86. The portion along US 15 in Pennsylvania is slated to become

Interstate 99 Interstate 99 (I-99) is an Interstate Highway in the United States with two segments: one located in central Pennsylvania, and the other in southern New York. The southern terminus of the route is near exit 146 of the Pennsylvania Turn ...

Corridor U-1

Corridor U-1 is a

spur A spur is a metal tool designed to be worn in pairs on the heels of riding boots for the purpose of directing a horse or other animal to move forward or laterally while riding. It is usually used to refine the riding aids (commands) and to back ...

from Corridor U at

Tioga, Pennsylvania Tioga is a borough in Tioga County, Pennsylvania, United States. The population was 611 at the 2010 census. It is located north of Tioga and Hammond Lakes along the Tioga River. Etymology The name "Tioga" is borrowed from Native American trib ...

, continuing north along I-99/

Corning, New York Corning is a city in Steuben County, New York, United States, on the Chemung River. The population was 10,551 at the 2020 census. It is named for Erastus Corning, an Albany financier and railroad executive who was an investor in the company t ...

, where it connects with Corridor T (

I-86 Interstate 86 may refer to any of three unconnected Interstate Highways in the United States: * Interstate 86 (Pennsylvania–New York) * Interstate 86 (Idaho) * Interstate 84 (Pennsylvania–Massachusetts), section east of East Hartford, Connect ...

). Only the portion in New York is signed as I-99; the portion in Pennsylvania is slated to become I-99 but is currently only signed as US 15.

Corridor V

Corridor V is a

in the

s of

Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...

Alabama (We dare defend our rights) , anthem = "Alabama (state song), Alabama" , image_map = Alabama in United States.svg , seat = Montgomery, Alabama, Montgomery , LargestCity = Huntsville, Alabama, Huntsville , LargestCounty = Baldwin County, Al ...

, and

. Its termini are Interstate 55 (I-55) in

Batesville, Mississippi Batesville is a city in Panola County, Mississippi, United States. The population was 7,463 at the 2010 census. Batesville is one of two county seats which the legislature established for Panola County, related to a longstanding rivalry between ...

, and

I-24 Interstate 24 (I-24) is an Interstate Highway in the Midwestern and Southeastern United States. It runs diagonally from I-57, south of Marion, Illinois, to Chattanooga, Tennessee, at I-75. It travels through Illinois, Kentucky, Tennessee, ...

west of

. As of late 2014, the following portions of Corridor V have been recently completed or are underway: * Between

Red Bay, Alabama Red Bay is a city in Franklin County, Alabama, Franklin County, Alabama, United States. It was founded in 1907; its western boundary line is integral with the state line between Mississippi and Alabama. The population was 3,232 at the 2020 census. ...

, and

Fulton, Mississippi Fulton is a city in and the county seat of Itawamba County, Mississippi, United States. The population was 3,961 at the 2010 census. The city is part of the Tupelo Micropolitan Statistical Area. History Fulton was established in 1837 as a count ...

(designated Mississippi Highway 76 (MS 76)) * Relocated US 278/ MS 6 between

Tupelo Tupelo , genus ''Nyssa'' , is a small genus of deciduous trees with alternate, simple leaves. It is sometimes included in the subfamily Nyssoideae of the dogwood family, Cornaceae, but is placed by other authorities in the family Nyssaceae. In ...

and

Pontotoc, Mississippi Pontotoc is a city in, and the county seat of, Pontotoc County, Mississippi, located to the west of the much larger city of Tupelo. The population was 5,625 at the 2010 census. Pontotoc is a Chickasaw word that means, “Land of the Hanging Gra ...

, which was opened in July 2014. Both sections of highway are currently under design by the

Mississippi Department of Transportation The Mississippi Department of Transportation (MDOT) is the organization in charge of developing and maintaining all state and federal roadways in the U.S. state of Mississippi. In addition to highways, the department also has a limited role in sup ...

, with the portion that will travel concurrently with MS 25 already under construction near

Fulton Fulton may refer to: People * Robert Fulton (1765–1815), American engineer and inventor who developed the first commercially successful steam-powered ship * Fulton (surname) Given name * Fulton Allem (born 1957), South African golfer * Fult ...

. A widening project is also underway on Alabama State Route 24 (SR 24) between Red Bay and Russellville, as this section of Corridor V was previously reconstructed as an improved two-lane route within divided a four-lane right-of-way. Corridor V between Batesville and Fulton was also designated as National Highway System

High Priority Corridor The Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA, pronounced ''Ice-Tea'') is a United States federal law that posed a major change to transportation planning and policy, as the first U.S. federal legislation on the subject in ...

42 and a Future Interstate Corridor as part of the 1998

Transportation Equity Act for the 21st Century The United States federal Transportation Equity Act for the 21st Century (TEA-21) is a federal transportation bill enacted June 9, 1998, as and . TEA-21 authorized federal surface transportation programs for highways, highway safety, and transit ...

; originally, Corridor 42 also included a concurrency with Corridor X between Fulton and

Birmingham, Alabama Birmingham ( ) is a city in the north central region of the U.S. state of Alabama. Birmingham is the seat of Jefferson County, Alabama's most populous county. As of the 2021 census estimates, Birmingham had a population of 197,575, down 1% fr ...

, but this concurrency was removed in subsequent legislation. However, the portion of the route between Batesville and Tupelo was only constructed to four-lane divided highway standards, making Interstate highway designation unlikely in the near future. Corridor V was also designated as High Priority Corridor 11 in the

National Highway System Designation Act The National Highway System (NHS) is a network of strategic highways within the United States, including the Interstate Highway System and other roads serving major airports, ports, military bases, rail or truck terminals, railway stations, pip ...

of 1995.''Appalachian Regional Commission'' (September 30, 2004)
"ARC, ADHS Approved Corridors and Termini"
. Retrieved 28 July 2005.

Corridor W

Corridor W is a

in the

s of

South Carolina )''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...

and

. It is routed entirely along U.S. Route 25 (US 25); from Interstate 85 (I-85), in

Greenville, South Carolina Greenville (; locally ) is a city in and the seat of Greenville County, South Carolina, United States. With a population of 70,720 at the 2020 census, it is the sixth-largest city in the state. Greenville is located approximately halfway be ...

, to I-26, near

East Flat Rock, North Carolina East Flat Rock is an unincorporated area and census-designated place (CDP) in Henderson County, North Carolina, Henderson County, North Carolina, United States. The population was 4,995 at the 2010 United States Census, 2010 census, up from 4,151 a ...

. The entire corridor is four-lane, that is expressway grade in South Carolina and freeway grade in North Carolina. Of the entire route, only was authorized for ADHS funding. In the 2013 fiscal year, both states completed their sections of Corridor W; South Carolina also became the first state to complete its entire ADHS miles of any of the 13 Appalachian states.

Corridor X

Corridor X is a

in the

s of

and

. It travels from

, to

Interstate 65 Interstate 65 (I-65) is a major north–south Interstate Highway in the central United States. As with most primary Interstates ending in 5, it is a major crosscountry, north–south route, connecting between the Great Lakes and the Gulf ...

, in

Corridor X-1

Corridor X-1 or the Birmingham Northern Beltline is a proposed northern bypass around

. Beginning at

I-20 Interstate 20 (I‑20) is a major east–west Interstate Highway in the Southern United States. I-20 runs beginning at an interchange with I-10 in Scroggins Draw, Texas, and ending at an interchange with I-95 in Florence, South Carolina. Between ...

I-59 Interstate 59 (I-59) is an Interstate Highway located in the southeastern United States. It is a north–south route that spans from a junction with I-10 and I-12 at Slidell, Louisiana, to a junction with I-24 near Wildwood, Georgia. ...

/ US-11 and

I-459 Interstate 459 (I-459) is a bypass highway of I-59 that is an alternate Interstate Highway around the southern sides of Birmingham, Bessemer, and several other cities and towns in Jefferson County, Alabama. I-459 lies entirely within Jeffe ...

, south of

Bessemer, Alabama Bessemer is a southwestern suburb of Birmingham in Jefferson County, Alabama, United States. The population was 26,019 at the 2020 census. It is within the Birmingham- Hoover, AL Metropolitan Statistical Area, of which Jefferson County is the ...

, it will travel northwest connecting with

I-22 I22 or I 22 may refer to: * Interstate 22 Interstate 22 (I-22) is a Interstate Highway in the US states of Mississippi and Alabama, connecting I-269 near Byhalia, Mississippi, to I-65 near Birmingham, Alabama. I-22 is also Corridor X of ...

US 78 The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

I-65 Interstate 65 (I-65) is a major north–south Interstate Highway in the central United States. As with most primary Interstates ending in 5, it is a major crosscountry, north–south route, connecting between the Great Lakes and the Gulf ...

, then ending at I-59 north of I-459.

References

{{Reflist, 2

External links

current map of the ADHS

ADHS Approved Corridors and TerminiCross-Reference of ADHS Corridors to State/U.S. Highways as of 3/13/98AARoads - Appalachian Regional Commission Development Corridors
Appalachian Development Highway System, Highways in the United States

History

List of ADHS corridors

Corridor A

Corridor A-1

Corridor B

Corridor B-1

Corridor C

Corridor C-1

Corridor D

Corridor E

Corridor F

Corridor G

Corridor H

Corridor I

Corridor J

Corridor J-1

Corridor K

Corridor L

Corridor M

Corridor N

Corridor O

Corridor O-1

Corridor P

Corridor P-1

Corridor Q

Corridor R

Corridor S

Corridor T

Corridor U

Corridor U-1

Corridor V

Corridor W

Corridor X

Corridor X-1

See also

References

External links