Corridor X shields along future Interstate 22 in Alabama

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

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 U.S. state, states, a Washington, D.C., federal district, five ma ...

. 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 The Appalachian Regional Development Act of 1965 established the Appalachian Regional Commission (ARC), which was tasked with overseeing economic development programs in the Appalachia region, as well as the construction of the Appalachian Developme ...

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 ...

, U.S., and Interstate 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 f ...

's Appalachian Regional Commission (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 ...

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. T ...

, 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 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 t ...

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 developi ...

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 a ...

. 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 498,71 ...

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 C ...

. I-40 continues easterly past Asheville, where it meets

I-26 I26 may refer to: * Interstate 26 Interstate 26 (I-26) is a main route of the Interstate Highway System in the Southeastern United States. Nominally east–west, as indicated by its even number, I-26 runs from the junction of U.S. Route 11W ...

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 historic ...

. 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, near the north end of

I-575 Interstate 575 (I-575) is an auxiliary Interstate Highway in the United States, which branches off I-75 in Kennesaw and connects the Atlanta metropolitan area with the North Georgia mountains, extending . I-575 is also the unsigned State R ...

, 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, 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 historica ...

near Sylva. From Sylva to its end at I-40 near Clyde, 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 establish ...

, 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 name ...

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

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

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 Virgini ...

, and

Ohio Ohio () is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Of the List of states and territories of the United States, fifty U.S. states, it is the List of U.S. states and territories by area, 34th-l ...

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

near Asheville, North Carolina, north to Corridor C 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, ...

. 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 ...

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. US 52 continues west to

Portsmouth Portsmouth ( ) is a port and city status in the United Kingdom, city in the ceremonial county of Hampshire in southern England. The city of Portsmouth has been a Unitary authorities of England, unitary authority since 1 April 1997 and is admi ...

, 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 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 Corridor C 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 of

. 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/ I-74 North–South Corridor.

Corridor C-1

Corridor C-1 is a

connector Connector may refer to: Hardware *Plumbing * Electrical connector, a device for joining electrical circuits together (sometimes known as ports, plugs, or interfaces) ** Gender of connectors and fasteners ** AC power plugs and sockets, devices tha ...

from Corridor C near Chillicothe southeast to Corridor D 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 lin ...

, to I-79, near Bridgeport, West Virginia. 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. T ...

in the U.S. states 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 ...

and

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), 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; ...

, connecting I-79 in Morgantown to I-70 in Hancock. 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 Hancock. The freeway mainly spans rural areas, and crosses numerous mountain ridges along its route. A road cut constructed for it through Sideling Hill 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 and

Cumberland, Maryland Cumberland is a U.S. city in and the county seat of Allegany County, Maryland. It is the primary city of the Cumberland, MD-WV Metropolitan Statistical Area. At the 2020 census, the city had a population of 19,076. Located on the Potomac River, ...

, 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 ...

for westbound traffic from Washington, D.C. 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, and the plan to link the Mon–Fayette Expressway, a toll highway 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, Ma ...

Corridor F

Corridor F is a

in the U.S. states of

and

. It travels from Interstate 75 (I-75) in Caryville, Tennessee, 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 ( 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 u ...

. There, it turns northwest along US 25E, passing through the Cumberland Gap Tunnel into Kentucky. It leaves US 25E in Pineville, Kentucky, 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 historic ...

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

Corridor G

Corridor G is a

in the U.S. states of

and

that follows the route of U.S. Route 119 (US 119) from Pikeville, Kentucky, to Charleston, West Virginia. 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 U.S. states of

and

. It travels from Weston, 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 I-79 in Weston and will end at I-81 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 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, ...

- Tucker county line to Wardensville as of July 2016.

Corridor I

Corridor I is a

in the U.S. state of

. It travels from Interstate 64 (I-64) southeasterly along the Mountain Parkway and Kentucky Route 15 (KY 15) to Corridor F ( 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 historic ...

(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 to ...

and KY 80 in

Hazard A hazard is a potential source of harm. Substances, events, or circumstances can constitute hazards when their nature would allow them, even just theoretically, to cause damage to health, life, property, or any other interest of value. The probab ...

Corridor J

Corridor J is a

in the U.S. states 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 (U.S. state), Georgia, it also extends into Marion County, Tennessee, Marion County on its west ...

, 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 ...

in London, Kentucky. 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 referred ...

, and Cookeville to Livingston. 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 , lor ...

and then east on KY 80 to

London London is the capital and List of urban areas in the United Kingdom, 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 dow ...

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

Corridor K

Corridor K is a

in the U.S. states of

and

. Overlapped entirely by U.S. Route 74 (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 nam ...

(US 64 Bypass) US 129 and US 441. The corridor connects Interstate 75 (I-75) in Cleveland, Tennessee (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. US19-US74-US129-Murphy

There are two gaps in the corridor, one in each state. The gap in Tennessee is the Ocoee Scenic Byway along the Ocoee River 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 Andrews may refer to: Places Australia *Andrews, Queensland *Andrews, South Australia United States *Andrews, Florida (disambiguation), various places *Andrews, Indiana * Andrews, Nebraska *Andrews, North Carolina * Andrews, Oregon * Andrews, Sou ...

to Stecoah. Broken in three projects, the plan outlines a new four-lane expressway 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 and

. In 1986, US 74 was extended west from Asheville, 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 ...

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, th ...

and Dillsboro at freeway grade. The corridor also connects the cities of Ducktown and Bryson City, 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 U.S. state of

. It follows the path of U.S. Route 19 (US 19) between Beckley and Sutton. 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 ( I-64 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 Provinces and territories of Canada, Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the List of the largest municipalities in Canada by population, most pop ...

, 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, a ...

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 U.S. state of

. It follows Pennsylvania Route 66 from Interstate 76 near New Stanton to an intersection near Delmont, where it follows U.S. Route 22 until the Interstate 81 interchange near

Harrisburg Harrisburg is the capital city of the Commonwealth of Pennsylvania, United States, and the county seat of Dauphin County. With a population of 50,135 as of the 2021 census, Harrisburg is the 9th largest city and 15th largest municipality in Pe ...

. 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 and Lewistown

Corridor N

Corridor N is a

in the U.S. states of

and

. It is a designated portion of U.S. Route 219 (US 219), traveling from Corridor E ( I-68/ US 40) near Grantsville, Maryland, north to Corridor M ( US 22 near Ebensburg, Pennsylvania). There is currently an attempt in the U.S. House of Representatives 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 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 from just north of Ebensburg to

Meyersdale Meyersdale is a borough in Somerset County, Pennsylvania, on the Casselman River, southeast of Pittsburgh. It is part of the Johnstown, Pennsylvania, Metropolitan Statistical Area. In the past, Meyersdale's chief industry was the mining of coa ...

. 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 U.S. states 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 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 bor ...

. The part north of the

( I-70/ I-76) 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 cens ...

, and travels northwesterly along US 322 to

near Clearfield.

Corridor P

Corridor P is a

in the U.S. state of

. It travels from a point near Mackeyville, eastward to Milton, via Williamsport.

Corridor P-1

Corridor P-1 begins at Corridor M ( US 22/ US 322) near Duncannon and travels north for along US 11/ US 15 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 ...

and

I-180 I-180 may refer to: * Interstate 180 (disambiguation), one of several roads * Polikarpov I-180 The Polikarpov I-180 (russian: И-180) was a 1938 Soviet fighter prototype. It was the last attempt to extract performance from the basic Polikarpov I- ...

near Milton.ADHS Approved Corridors and Termini
/ref> The majority of the corridor's length from its southern terminus to

Selinsgrove Selinsgrove is the largest borough in Snyder County, Pennsylvania, United States. The population is estimated to be 5,761 for the 2020 Census. Selinsgrove is geographically located in the middle of the Susquehanna River Valley in Central Penns ...

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 (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 U.S. states of

, and

. It travels from US 23/ US 119, near Pikeville, Kentucky, to Interstate 81, in Christiansburg, Virginia. In the 2013 fiscal year, the corridor is 82.2% completed.

Corridor R

Corridor R is a

in the U.S. state of

. It travels from

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

( US 23/ US 460) in

Prestonsburg Prestonsburg is a small home rule-class city in and the county seat of Floyd County, Kentucky, United States. It is in the eastern part of the state in the valley of the Big Sandy River. The population was 3,255 at the time of the 2010 censu ...

. 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. By population, it is the second-largest city in Kentucky and 57th-largest city in the United States. By land area, it is the country's 28th-largest ...

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 ...

using Interstate 64 (I-64),

, Corridor R,

, Corridor Q, and I-81.

Corridor S

Corridor S is a

in the U.S. state of

. It is routed entirely along U.S. Route 25E (US 25E); from Interstate 81 (I-81), near

Morristown Morristown may refer to: Places Canada *Morristown, Nova Scotia (disambiguation) United States * Morristown, Arizona *Morristown, Indiana ** Morristown station (Indiana) *Morristown, Minnesota ** Morristown Township, Rice County, Minnesota *Morris ...

, 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. Historically in the West Riding of Yorkshire, the town is a tourist destination and its visitor attractions include its spa wate ...

. 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 serv ...

s and design and construction of interchanges to meet interstate standards.

Corridor T

Corridor T is a

in the U.S. states 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 at ...

) to Windsor, New York, and corresponds to Interstate 86, an upgrade of the existing New York State Route 17 (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), 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, ...

northeast of Erie, with I-87 (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. As of August 2008, it travels east from I-90 to NY 352 in

Elmira Elmira may refer to: Places Canada * Elmira, Ontario * Elmira, Prince Edward Island United States * Elmira, California * Elmira, Idaho * Elmira, Indiana * Elmira, Michigan * Elmira, Missouri * Elmira, New York ** Elmira Correctional Facility ...

, 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 from I-90 to I-87, MapQuest 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 ...

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

, Binghamton, and the Catskill Mountains. 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 rest of I-86 will be in New York.

Corridor U

Corridor U is a

in the U.S. states 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 popul ...

, 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 census ...

. The corridor follows US 15 northward from Williamsport to Tioga Junction, where it turns northeastward to follow Pennsylvania Route 328 (PA 328), New York State Route 328 (NY 328), and New York State Route 14 (NY 14) through Elmira to I-86. The portion along US 15 in Pennsylvania is slated to become Interstate 99.

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 ba ...

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 tr ...

, continuing north along I-99/ US 15 to Corning, New York, where it connects with Corridor T ( I-86). 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 U.S. states 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. Mis ...

Alabama (We dare defend our rights) , anthem = " Alabama" , image_map = Alabama in United States.svg , seat = Montgomery , LargestCity = Huntsville , LargestCounty = Baldwin County , LargestMetro = Greater Birmingham , area_total_km2 = 135,7 ...

, and

. Its termini are Interstate 55 (I-55) in Batesville, Mississippi, 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, and Fulton, Mississippi (designated Mississippi Highway 76 (MS 76)) * Relocated US 278/ MS 6 between Tupelo and Pontotoc, Mississippi, 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. 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 42 and a Future Interstate Corridor as part of the 1998 Transportation Equity Act for the 21st Century; 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 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 U.S. states 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 = G ...

and

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

, near East Flat Rock, North Carolina. 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 U.S. states of

and

. It travels from Fulton, Mississippi, 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 Gu ...

, in

Corridor X-1

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

bypass Bypass may refer to: * Bypass (road), a road that avoids a built-up area (not to be confused with passing lane) * Flood bypass of a river Science and technology Medicine * Bypass surgery, a class of surgeries including for example: ** Heart bypas ...

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. Bet ...

/ I-59/

US-11 {{Infobox road , country=USA , type=US , route=11 , map={{maplink, frame=yes, plain=yes, frame-align=center, frame-width=290, frame-height=330, type=line, from=U.S. Route 11.map , map_custom=yes , map_notes=US 11 in red, US 11E in blue, US 11W in ...

and I-459, south of

Bessemer, Alabama Bessemer is a southwestern suburb of Birmingham, Alabama, Birmingham in Jefferson County, Alabama, Jefferson County, Alabama, United States. The population was 26,019 at the 2020 United States census, 2020 census. It is within the Birmingham-Ho ...

, it will travel northwest connecting with I-22, US 78, I-65, then ending at I-59 north of I-459.

References

{{Reflist, 2

External links

current map o

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