Interstate 40

Last updated


Interstate 40
Interstate 40 map.png
Route information
Length2,559.25 mi [1] (4,118.71 km)
Existed1957 [2] –present
Major junctions
West endI-15.svg I15 in Barstow, CA
East endUS 117.svg US 117 in Wilmington, NC
States California, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Tennessee, North Carolina
Highway system

Interstate 40 (I-40) is a major east-west Interstate Highway running through the south-central portion of the United States generally north of I-10, I-20 and I-30 but south of I-70. The western end is at I-15 in Barstow, California; its eastern end is at a concurrency of U.S. Route 117 (US 117) and North Carolina Highway 132 in Wilmington, North Carolina. It is the third-longest Interstate Highway in the United States, behind I-80 and I-90. Much of the western part of I-40, from Oklahoma City to Barstow parallels or overlays the historic US 66, east of Oklahoma City the route generally parallels US 64 and US 70. I-40 runs through many major cities including Albuquerque, New Mexico; Amarillo, Texas; Oklahoma City, Oklahoma; Little Rock, Arkansas; Memphis, Tennessee; Nashville, Tennessee; Knoxville, Tennessee; Greensboro, North Carolina; and Raleigh, North Carolina.

Interstate 10 Interstate across southern US

Interstate 10 (I-10) is the southernmost cross-country Interstate Highway in the American Interstate Highway System. It stretches from the Pacific Ocean at California State Route 1 in Santa Monica, California, to I-95 in Jacksonville, Florida. Major cities connected by I-10 include Los Angeles, Phoenix, Tucson, El Paso, San Antonio, Houston, Baton Rouge, New Orleans, Mobile, Pensacola and Jacksonville. This freeway is part of the originally planned Interstate Highway network that was laid out in 1956, and its last section was completed in 1990. I-10 is the fourth-longest Interstate Highway in the United States, following I-90, I-80, and I-40. About one-third of its length is within the state of Texas, where the freeway spans the state at its widest breadth.

Interstate 20 Interstate in southern US

Interstate 20 (I‑20) is a major east–west Interstate Highway in the Southern United States. I‑20 runs 1,535 miles (2,470 km) beginning near Kent, Texas, at I-10 to Florence, South Carolina, at I-95. Between Texas and South Carolina, I‑20 runs through northern Louisiana, Mississippi, Alabama, and Georgia. The major cities that I-20 connects to includes Fort Worth, Texas; Dallas, Texas; Shreveport, Louisiana; Jackson, Mississippi; Birmingham, Alabama; Atlanta, Georgia; Augusta, Georgia; and Columbia, South Carolina.

Interstate 30 (I-30) is a 366.76-mile-long (590.24 km) expressway in the southern states of Texas and Arkansas in the United States, part of the Interstate Highway System. I-30 travels from I-20 west of Fort Worth, Texas, northeast via Dallas, and Texarkana, Texas, to I-40 in North Little Rock, Arkansas. The highway parallels U.S. Route 67 (US 67) except for the portion west of downtown Dallas. Between the termini, I-30 has interchanges with I-35W, I-35E and I-45. I-30 is known as the Tom Landry Freeway between I-35W and I-35E, within the core of the Dallas–Fort Worth metroplex.


Route description


A sign showing the distance to Wilmington, North Carolina at the start of Interstate 40 in Barstow. This sign has been stolen several times. Start of Interstate 40.jpg
A sign showing the distance to Wilmington, North Carolina at the start of Interstate 40 in Barstow. This sign has been stolen several times.

Interstate 40 is a major east–west route of the Interstate Highway System. Its western end is in Barstow, California. Known as the Needles Freeway, it heads east from Barstow across the Mojave Desert in San Bernardino County to Needles, before it crosses into Arizona southwest of Kingman. I-40 covers 155 miles (249 km) in California.

Interstate Highway System United States 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. The system is named for President Dwight D. Eisenhower, who championed its formation. Construction was authorized by the Federal Aid Highway Act of 1956, and the original portion was completed 35 years later, although some urban routes were cancelled and never built. The network has since been extended. In 2016, it had a total length of 48,181 miles (77,540 km). As of 2016, about one-quarter of all vehicle miles driven in the country use the Interstate system. In 2006, the cost of construction was estimated at about $425 billion.

Barstow, California City in California, United States

Barstow is a city in San Bernardino County, California, United States. The population was 22,639 at the 2010 census. Barstow is located 67 miles (108 km) north of San Bernardino.

Mojave Desert desert in southwestern United States

The Mojave Desert is an arid rain-shadow desert and the driest desert in North America. It is in the Southwestern United States, primarily within southeastern California and southern Nevada, and it occupies 47,877 sq mi (124,000 km2). Very small areas also extend into Utah and Arizona. Its boundaries are generally noted by the presence of Joshua trees, which are native only to the Mojave Desert and are considered an indicator species, and it is believed to support an additional 1,750 to 2,000 species of plants. The central part of the desert is sparsely populated, while its peripheries support large communities such as Las Vegas, Barstow, Lancaster, Palmdale, Victorville, and St. George.

A sign in California showing the distance to Wilmington, North Carolina has been stolen several times. [3]

Wilmington, North Carolina City in North Carolina, United States

Wilmington is a port city and the county seat of New Hanover County in coastal southeastern North Carolina, United States.


I-40 west towards L.A., nearing exit 201 in Arizona Interstate 40 Arizona.jpg
I-40 west towards L.A., nearing exit 201 in Arizona

Interstate 40 is a main route to the South Rim of the Grand Canyon, with the exits leading into Grand Canyon National Park in Williams and Flagstaff. I-40 covers 359 mi (577.75 km) in Arizona. Just west of exit 190, west of Flagstaff, is its highest elevation along I-40 in the U.S., as the road crosses just over 7,320 ft (2,231.14 m). I-40 also passes through the Navajo Nation, the largest Indian reservation in the U.S.

Grand Canyon A steep-sided canyon carved by the Colorado River in Arizona, United States

The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile.

Grand Canyon National Park national park of the United States in Arizona

Grand Canyon National Park, located in northwestern Arizona, is the 15th site in the United States to have been named a national park. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World. The park, which covers 1,217,262 acres of unincorporated area in Coconino and Mohave counties, received more than six million recreational visitors in 2017, which is the second highest count of all American national parks after Great Smoky Mountains National Park. The Grand Canyon was designated a World Heritage Site by UNESCO in 1979. The park celebrated is 100th anniversary on February 26, 2019.

Williams, Arizona City in Arizona, United States

Williams is a city in Coconino County, Arizona, west of Flagstaff. Its population was 3,158 in 2017, according to the U.S. Census Bureau. It lies on the route of Historic Route 66, Interstate 40, and the Southwest Chief Amtrak train route. It is also the southern terminus of the Grand Canyon Railway, which takes visitors to Grand Canyon Village. There are numerous inns, motels, restaurants and gas stations that cater to the large influx of tourists rather than local residents, especially during the summer and holiday seasons.

New Mexico

Interstate 40 in eastern New Mexico Interstate 40 in eastern New Mexico.jpg
Interstate 40 in eastern New Mexico

I-40 covers 374 miles (602 km) in New Mexico. Notable cities along I-40 include Gallup, Grants, Albuquerque, Santa Rosa, and Tucumcari. I-40 also travels through several different Indian reservations in the western half of the state. It reaches its highest point of 7,275 feet at the Continental Divide in western New Mexico between Gallup and Grants. Arizona, New Mexico, and Texas are the only three states where I-40 has a speed limit of 75 mph (120 km/h) instead of 70 mph (112 km/h) which happens in California, Oklahoma, Arkansas, Tennessee, and North Carolina.

Gallup, New Mexico City in New Mexico, United States

Gallup is a city in McKinley County, New Mexico, United States, with a population of 21,678 as of the 2010 census. A substantial percentage of its population is Native American, with residents from the Navajo, Hopi, and Zuni tribes. Gallup is the county seat of McKinley County and the most populous city between Flagstaff and Albuquerque, along the historic U.S. Route 66.

Grants, New Mexico City in New Mexico, United States

Grants is a city in Cibola County, New Mexico, United States. It is located about 78 miles (126 km) west of Albuquerque. The population was 9,182 at the 2010 Census. It is the county seat of Cibola County.

Albuquerque, New Mexico City in New Mexico, United States

Albuquerque, also known locally as Duke City and abbreviated as ABQ, is the most populous city in the U.S. state of New Mexico and the 32nd-most populous city in the United States, with a census-estimated population of 558,545 in 2017. It is the principal city of the Albuquerque metropolitan area, which has 915,927 residents as of July 2018. Albuquerque's Metropolitan statistical area is the 60th-largest in the United States. The Albuquerque MSA population includes the cities of Rio Rancho, Bernalillo, Placitas, Corrales, Los Lunas, Belen, and Bosque Farms, and forms part of the larger Albuquerque–Santa Fe–Las Vegas combined statistical area, with a total population of 1,171,991 in 2016.


An at-grade intersection on I-40 in Texas. Photo taken in 2003. Grade intersection on I-40.jpg
An at-grade intersection on I-40 in Texas. Photo taken in 2003.

In the west Texas panhandle area, there are several ranch roads connected directly to the interstate. One of the marked at-grade crossings is shown to the right. The only major city in Texas that is directly served by I-40 is Amarillo, which connects with Interstate 27 that runs south toward Lubbock. I-40 has only one welcome center in the state that is located in Amarillo at the exit for Rick Husband Amarillo International Airport, serving both sides of the interstate.

Amarillo, Texas City in Texas, United States

Amarillo is the 14th-most populous city in the state of Texas, United States. It is also the largest city in the Texas Panhandle, and the seat of Potter County. A portion of the city extends into Randall County. The estimated population was 199,826 as of 2017. The Amarillo metropolitan area has an estimated population of 276,020 in four counties as of 2017. The metro population is projected to surpass 310,000 in 2020.

Interstate 27 (I-27) is an Interstate Highway, entirely in the U.S. state of Texas, running north from Lubbock to Interstate 40 in Amarillo. These two cities are the only control cities on I-27; other cities and towns served by I-27 include New Deal, Abernathy, Hale Center, Plainview, Kress, Tulia, Happy, and Canyon. In Amarillo, I-27 is commonly known as the Canyon Expressway, although it is also called Canyon Drive on its access roads. I-27 was officially designated the Marshall Formby Memorial Highway after former attorney and Texas State Senator Marshall Formby in 2005. The entire length of I-27 replaced U.S. Route 87 for through traffic.

Lubbock, Texas City in Texas, United States

Lubbock is the 11th-most populous city in the U.S. state of Texas and the county seat of Lubbock County. With a population of 256,042 in 2015, the city is also the 83rd-most populous in the United States. The city is in the northwestern part of the state, a region known historically and geographically as the Llano Estacado, and ecologically is part of the southern end of the High Plains, lying at the economic center of the Lubbock metropolitan area, which has a projected 2020 population of 327,424.


I-40 Exit 240A in Oklahoma Henryetta, exit sign on I-40.jpg
I-40 Exit 240A in Oklahoma

Interstate 40 goes through the heart of the state, passing through many Oklahoma cities and towns, including Erick, Sayre, Elk City, Clinton, Weatherford, El Reno, Yukon, Oklahoma City, Del City, Midwest City, Shawnee, Okemah, Henryetta, Checotah, Sallisaw, and Roland. I-40 covers 331 miles (533 km) in Oklahoma.

In Downtown Oklahoma City, Interstate 40 was rerouted a mile south of its former alignment and a 10lane (5 in each direction) facility replaced the former I-40 Crosstown Bridge; itself will be replaced with an urban boulevard currently designated as Oklahoma City Boulevard.


I-30/US 65/US 67/US 167 branch south from I-40/US 65/AR 107 in North Little Rock. This is also the eastern terminus of I-30. I30EasternTerminus.jpg
I-30/US 65/US 67/US 167 branch south from I-40/US 65/AR 107 in North Little Rock. This is also the eastern terminus of I-30.

Interstate 40 enters the west-central part of the state and runs for 284 miles (457 km) in Arkansas. The route passes through Van Buren, where it intersects the southbound Interstate 540/US 71 to Fort Smith. [4] The route continues east to Alma to intersect Interstate 49 north to Fayetteville, Arkansas. Running through the Ozark Mountains, I-40 serves Ozark, Clarksville, Russellville, Morrilton and Conway. The route turns south after Conway and enters North Little Rock, which brings high volume interchanges with Interstate 430, I-30/US 65/US 67/US 167, and I-440/AR 440. [5] The interstate continues east through Lonoke, Brinkley, and West Memphis on the eastern side. Interstate 40 briefly overlaps Interstate 55 in West Memphis before it crosses the Mississippi River on the Hernando de Soto Bridge and enters Memphis, Tennessee. [6]


The Hernando de Soto Bridge, where I-40 crosses the Mississippi River into Memphis Hernando de Soto Bridge Memphis.jpg
The Hernando de Soto Bridge, where I-40 crosses the Mississippi River into Memphis

More of Interstate 40 passes through Tennessee, 455 miles (732 km), than any other state. The interstate goes through all of the three Grand Divisions of Tennessee and its three largest cities, Memphis, Nashville and Knoxville. Jackson, Lebanon, Cookeville, Crossville, and Newport are other notable cities and/or towns through which I-40 passes. Before leaving the state, I-40 enters the Great Smoky Mountains towards North Carolina.

The section of Interstate 40 which runs between Memphis and Nashville is often referred to as the Music Highway. [7] During reconstruction, a long section of I-40 through downtown Knoxville near the central Malfunction Junction was completely closed to traffic from May 1, 2008 and not reopened until June 12, 2009 with all traffic redirected via Interstate 640, the northern bypass route. The redesigned section now has additional lanes in each direction, is less congested, and has fewer accidents. [8] [9]

North Carolina

I-40 east approaching the Raleigh, NC Beltline Beltline1.JPG
I-40 east approaching the Raleigh, NC Beltline

In North Carolina, I-40 travels 421 miles (678 km). It enters the state as a winding mountain freeway through the Great Smoky Mountains which frequently closes due to landslides and weather conditions. It enters the state on a mostly north-south alignment, turning to a more east-west alignment upon merging with U.S. Route 74 at the eastern terminus of the Great Smoky Mountains Expressway. From there the highway passes through Asheville, Hickory, and Statesville before reaching the Piedmont Triad. Just east of the Triad city of Greensboro, North Carolina it merges with I-85 and the two roads split again just west of the Research Triangle area, passing through Durham and Raleigh. From the Triangle to its eastern terminus in Wilmington, it once again takes a more north-south alignment.

Sign displaying distance to Barstow in Wilmington WilmingtonBarstow.JPG
Sign displaying distance to Barstow in Wilmington

A standard distance sign exists near the start of the westbound section of I-40 in Wilmington that indicates the distance to Barstow, California as 2,554 miles (4,110 km). Although NCDOT has stated it would not be replaced after frequent thefts, as of August 15, 2013, the sign is present.

  mi [1] km
CA 154.61248.82
AZ 359.48578.53
NM 373.51601.11
TX 177.10285.01
OK 331.03532.74
AR 284.69458.16
TN 455.28732.70
NC 423.55681.64


For about 1,000 miles (1,600 km), I-40 follows the general route of Beale's Wagon Road from Arkansas to California. Beale's Wagon Road was built in 1857–59 by a team led by Lt. Edward Fitzgerald Beale using a team of camels as pack animals.

In Albuquerque, New Mexico, I-40 was originally meant to replace Central Avenue through the center of the city. However, due to development and public opposition, a route running to the north of that one was chosen.[ citation needed ] The freeway intersects Central Ave. at both ends of the city.

In 1957, the California Department of Highways proposed that the route be renumbered to Interstate 30 instead, because of the already existing U.S. Route 40 in the state. Then, U.S. Route 40 was decommissioned in California in 1964, as a part of a major revamping of California's overall highway numbering system, so the problem disappeared. [10]

The California State government submitted State Route 58 between Barstow and Bakersfield for I-40 extension potential in 1956 and 1968, though those requests were rejected. [11] This portion of SR 58 was once signed as the U.S. Route 466.

From 1963 to 1966, the U.S. government considered a plan, part of Project Plowshare, to use atomic bombs to excavate a path for I-40 through California. The project was scuttled largely due to the cost of developing the explosives and due to the unavailability of a "clean bomb". [12]

In Memphis, I-40 was originally intended to go through the city's Overton Park toward downtown. Several miles of interstate were actually built within the I-240 loop. That portion of highway still exists, and it is in regular use as the non-Interstate Sam Cooper Boulevard, reaching the eastern end of the Chickasaw Country Club. Environmentalist opposition, combined with a victory in the United States Supreme Court by opponents of the Overton Park route (see Citizens to Preserve Overton Park v. Volpe ) forced abandonment of the original plans, and the road never reached the park. For over 20 years, I-40 signs existed on the dead-end route toward Overton Park. Eventually, the northern span of the I-240 loop was redesignated as I-40.[ citation needed ]

In 1971, the North Carolina State Highway Commission approved a plan to extend I-40 from Research Triangle Park to Interstate 95, a distance of 41 miles, at a cost of $75 million. Most of the highway would be four lanes, though six lanes were likely near Raleigh, where I-40 would extend the Beltline. Several routes were being considered, but at the time, the most likely route would have ended north of Smithfield. [13]

When the last portion of I-40, connecting Wilmington to Raleigh, was completed in the late 1980s, Charles Kuralt stated:

Originally, I-40 was constructed through downtown Winston-Salem, and it continued to follow that route until a new urban bypass route was built. After the bypass was completed around 1992, I-40 was relocated to the new freeway. The old highway was then redesignated as Interstate 40 Business, creating a business route that is actually an expressway for its entire length, a rarity among business routes. There are arguments that the former I-40 expressway in Winston-Salem should become an interstate again, especially since the road is currently undergoing an upgrade. There is one even loop number left for I-40, Interstate 640. Interstate 840 was recently available, however, since the NCDOT has had plans to use it for the northern loop of a beltway that is being built around nearby Greensboro.[ citation needed ]

The collapsed section of the Interstate 40 bridge, May 31, 2002 I40 Bridge disaster.jpg
The collapsed section of the Interstate 40 bridge, May 31, 2002

The I-40 bridge disaster occurred on May 26, 2002 when a barge collided with a bridge foundation member near Webbers Falls, Oklahoma, causing a 580-foot (177 m) section of the I-40 bridge to plunge into the Arkansas River. Automobiles and semi-trailers fell into the water, killing fourteen people.

The "Big I" I-25 and I-40 interchange in Albuquerque, New Mexico, was given an honorable mention by the United States Department of Transportation and the Federal Highway Administration for excellence in urban highway design in 2002. [15]

Landslides are common in the Pigeon River Gorge section along the Tennessee and North Carolina border. Here the roadway was cut into the slopes of several steep mountains. Accidents on the winding road are also common especially during bad weather. On October 25, 2009, Interstate 40 was closed at the North Carolina and Tennessee border due to a landslide at Mile Marker 2.6 just east of the Tennessee state line. All Traffic was detoured via Interstates 26 and 81, and non-heavy load traffic via US 25/70. [16] The roadway was reopened on April 25, 2010, with some remaining limitations on westbound traffic. [17]


The state of California submitted the segment of what is now State Route 58 (SR 58) between Barstow and Bakersfield for chargeable Interstate approval twice, in 1956 and 1968, presumably as an extension of I-40, but it was rejected both times. [18] This segment of SR 58 is being upgraded to freeway standards piece-by-piece as Caltrans has funds available.[ citation needed ] An extension of I-40 in California from its present terminus at Barstow to Bakersfield, and possibly as far west as Paso Robles, has been proposed. The proposed I-40 extension would generally follow SR 58 to Bakersfield, and follow SR 46 to Paso Robles. [19] However, there is no current push to apply for Interstate designation. SR 46 is slowly being upgraded to Interstate standards, minus overpasses, from US 101 in Paso Robles to I-5 in Lost Hills.

Major junctions

I-15.svg I15 in Barstow
US 95.svg US 95 west-northwest of Needles. The highways travel concurrently to Needles.
Future plate blue.svgNo image wide.svg
I-11 (Future).svgUS 93.svg Future I11 / US 93 in Kingman. The highways travel concurrently to east-northeast of Kingman.
I-17.svg I17 in Flagstaff
US 89.svgUS 180.svg US 89 / US 180 in Flagstaff. I-40/US 180 travels concurrently to Holbrook.
US 191.svg US 191 in Chambers. The highways travel concurrently to Sanders.
New Mexico
US 491.svg US 491 in Gallup
I-25.svgUS 85.svg I25 / US 85 in Albuquerque
US 285.svg US 285 in Clines Corners
US 84.svg US 84 west-northwest of Santa Rosa. The highways travel concurrently to Santa Rosa.
US 54.svg US 54 in Santa Rosa. The highways travel concurrently to Tucumcari.
US 385.svg US 385 in Vega
I-27.svgUS 60.svgUS 87.svgUS 287.svg I27 / US 60 / US 87 / US 287 in Amarillo. I-40/US 287 travels concurrently through Amarillo.
US 83.svg US 83 in Shamrock
US 283.svg US 283 in Sayre
US 183.svg US 183 in Clinton
US 281.svg US 281 in Hinton
US 270.svg US 270 west of El Reno. The highways travel concurrently to northwest of Shawnee.
US 81.svg US 81 in El Reno
I-44.svg I44 in Oklahoma City
I-35.svgI-235.svgUS 62.svgUS 77.svg I35 / I235 / US 62 / US 77 in Oklahoma City. I-35/I-40/US 62 travels concurrently through Oklahoma City.
I-240.svg I240 in Oklahoma City
US 177.svgUS 270.svg US 177 / US 270 northwest of Shawnee
US 377.svg US 377 south-southeast of Prague
US 62.svg US 62 in Okemah. The highways travel concurrently to Henryetta.
US 75.svg US 75 northeast of Clearview. The highways travel concurrently to Henryetta.
US 69.svg US 69 southwest of Checotah
US 266.svg US 266 in Warner
US 59.svg US 59 in Sallisaw
US 64.svg US 64 in Sallisaw
US 64.svg US 64 in Roland
I-540.svgUS 71.svg I540 / US 71 in Van Buren. I-40/US 71 travels concurrently to Alma.
I-49.svg I49 in Alma
US 64.svg US 64 in Clarksville
US 64.svg US 64 in Lamar
US 64.svg US 64 in London
US 65.svg US 65 in Conway. The highways travel concurrently to North Little Rock.
US 64.svg US 64 in Conway
I-430.svg I430 in North Little Rock
I-30.svgI-57 (Future).svgUS 65.svgUS 67.svgUS 167.svg I30 / Future I57 / US 65 / US 67 / US 167 in North Little Rock. I-40/US 67/US 167 travels concurrently through North Little Rock.
I-440.svg I440 in North Little Rock
US 63.svg US 63 in Hazen. The highways travel concurrently to West Memphis.
US 49.svg US 49 in Brinkley
US 79.svg US 79 south of Jennette. The highways travel concurrently to West Memphis.
I-55.svgUS 61.svgUS 63.svgUS 64.svg I55 / US 61 / US 63 / US 64 in West Memphis. I-40/I-55/US 61/US 64 travels concurrently through West Memphis.
US 51.svg US 51 in Memphis
I-69.svgI-240.svg I69 / I240 in Memphis. I-40/I-69 travels concurrently through Memphis.
US 64.svgUS 70.svgUS 79.svg US 64 / US 70 / US 79 in Memphis
I-240.svg I240 in Memphis
US 64.svg US 64 on the Memphis–Bartlett city line
US 70.svg US 70 east of Brownsville
US 412.svg US 412 in Jackson. The highways travel concurrently to northeast of Jackson.
US 45.svg US 45 in Jackson
US 70.svgUS 412.svg US 70 / US 412 northeast of Jackson
US 641.svg US 641 southeast of Holladay
US 70S.svg US 70S in Nashville
US 70.svg US 70 in Nashville
I-440.svg I440 in Nashville
I-65.svg I65 in Nashville. The highways travel concurrently through Nashville.
US 70.svg US 70 in Nashville
US 70.svgUS 70S.svgUS 431.svg US 70 / US 70S / US 431 in Nashville
I-24.svg I24 in Nashville. The highways travel concurrently through Nashville.
US 231.svg US 231 in Lebanon
US 70.svg US 70 in Lebanon
US 70N.svg US 70N in Cookeville
US 70N.svg US 70N in Monterey
US 127.svg US 127 in Crossville
US 27.svg US 27 in Harriman
US 321.svg US 321 in Lenoir City
I-75.svg I75 west of Farragut. The highways travel concurrently to Knoxville.
I-140.svg I140 in Knoxville
US 11.svgUS 70.svg US 11 / US 70 in Knoxville
I-75.svgI-640.svg I75 / I640 in Knoxville
US 129.svg US 129 in Knoxville
I-275.svg I275 in Knoxville
US 441.svg US 441 in Knoxville
US 11W.svg US 11W in Knoxville
I-640.svgUS 25W.svg I640 / US 25W in Knoxville. I-40/US 25W travels concurrently through Knoxville.
US 11E.svgUS 25W.svgUS 70.svg US 11E / US 25W / US 70 in Knoxville
US 25W.svgUS 70.svg US 25W / US 70 west of Dandridge
I-81.svg I81 north-northeast of Dandridge
US 25W.svgUS 70.svgUS 411.svg US 25W / US 70 / US 411 in Newport
US 321.svg US 321 in Newport
North Carolina
US 276.svg US 276 in Cove Creek
US 74.svg US 74 north-northwest of Clyde. The highways travel concurrently to Asheville.
US 19.svgUS 23.svg US 19 / US 23 in Asheville
I-26.svgI-240.svgUS 74.svg I26 / I240 / US 74 in Asheville
US 25.svg US 25 in Asheville
I-240.svg I240 in Asheville
US 70.svg US 70 in Black Mountain. The highways travel concurrently to southwest of Old Fort.
US 221.svg US 221 southeast of West Marion
US 64.svg US 64 in Morganton
US 321.svg US 321 in Hickory
US 64.svg US 64 in Statesville
US 21.svg US 21 in Statesville
I-77.svg I77 in Statesville
US 64.svg US 64 in Statesville
US 64.svg US 64 east-northeast of Statesville
US 64.svg US 64 west-northwest of Mocksville
US 601.svg US 601 in Mocksville
US 421.svg US 421 in Winston-Salem
US 158.svg US 158 in Winston-Salem
US 52.svgUS 311.svg US 52 / US 311 in Winston-Salem. I-40/US 311 travels concurrently through Winston-Salem.
I-74.svgUS 311.svg I74 / US 311 in Winston-Salem
US 421.svg US 421 west of Greensboro. The highways travel concurrently to Greensboro.
I-73.svgUS 421.svg I73 / US 421 in Greensboro
US 220.svg US 220 in Greensboro. The highways travel concurrently through Greensboro.
US 29.svgUS 70.svg US 29 / US 70 in Greensboro. The highways travel concurrently through Greensboro.
I-85.svg I85 in Greensboro. The highways travel concurrently to southwest of Hillsborough.
US 15.svgUS 501.svg US 15 / US 501 in Durham
I-540.svg I540 in Durham
I-440.svgUS 1.svgUS 64.svg I440 / US 1 / US 64 in Raleigh. I-40/US 64 travels concurrently through Raleigh.
US 70.svgUS 401.svg US 70 / US 401 in Raleigh
I-87.svgI-440.svgUS 64.svg I87 / I440 / US 64 in Raleigh
US 70.svg US 70 in Garner. The highways travel concurrently to west-southwest of Clayton.
Future plate blue.svgNo image wide.svg
I-42 (Future).svgUS 70.svg Future I42 / US 70 near Clayton.
I-95.svg I95 in Benson
US 701.svg US 701 south-southeast of Newton Grove
US 117.svg US 117 south-southeast of Warsaw
US 117.svg US 117 east-southeast of Willard
I-140.svgUS 17.svg I140 / US 17 in Murraysville
US 117.svg US 117 on the Kings Grant–Murraysville CDP line

Auxiliary routes

In Oklahoma City, the designation I-440 had been given to a stretch of Interstate Highway from I-240 to US 66. It was a part of Grand Boulevard that had been built in compliance with Interstate Highway standards. In 1982, as part of Oklahoma's "Diamond Jubilee", I-44's western terminus was moved from the I-35/I-44 junction to the Texas–Oklahoma state line via the Belle Isle Freeway (connecting I-440 with I-35); I-440, the H. E. Bailey Turnpike; and the turnpike connector road on the eastern edge of Lawton, Oklahoma. The I-440 number was dropped at the time.

Business routes

See also

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Interstate 55 (I-55) is a major Interstate Highway in the central United States. As with most interstates that end in a five, it is a major cross-country, north-south route, connecting the Gulf of Mexico to the Great Lakes. The highway travels from LaPlace, Louisiana, at I-10 to Chicago at U.S. Route 41, at McCormick Place. The major cities that I-55 connects to includes Jackson, Mississippi; Memphis, Tennessee; and St. Louis.

U.S. Route 412 highway in the United States

U.S. Route 412 is an east–west United States highway, first commissioned in 1982. Its route number is a "violation" of the usual AASHTO numbering scheme, as it comes nowhere near its implied "parent", US 12. U.S. 412 overlaps expressway-grade Cimarron Turnpike from Tulsa west to Interstate 35 and the Cherokee Turnpike from 5 miles (8.0 km) east of Chouteau, Oklahoma, to 8 miles (13 km) west of the Arkansas state line. A curiosity of this highway is that it runs the entire length of the Oklahoma Panhandle and traverses the Missouri Bootheel.

U.S. Route 79 highway in the United States

U.S. Route 79 is a United States highway. The route is officially considered and labeled as a north-south highway, but it is actually more of a diagonal northeast-southwest highway. The highway's northern/eastern terminus is in Russellville, Kentucky, at an intersection with U.S. Highway 68 and KY 80. Its southern/western terminus is in Round Rock, Texas, at an intersection with Interstate 35, ten miles (16 km) north of Austin.

U.S. Route 11 highway in the United States

U.S. Route 11 or U.S. Highway 11 is a major north–south United States highway extending 1,645 miles (2,647 km) across the eastern United States. The southern terminus of the route is at U.S. Route 90 in the Bayou Sauvage National Wildlife Refuge in eastern New Orleans, Louisiana. The northern terminus is at the Rouses Point - Lacolle 223 Border Crossing in Rouses Point, New York. The route continues across the border into Canada as Quebec Route 223. US 11, created in 1926, largely follows the route of the original plan.

U.S. Route 29 highway in the United States

U.S. Route 29 is a north–south United States highway that runs for 1,036 miles (1,667 km) from Pensacola, Florida to the western suburbs of Baltimore, Maryland. This highway's southern terminus is at US 90 and US 98 in Pensacola, Florida. Its northern terminus is at Maryland Route 99 in Ellicott City, Maryland.

U.S. Route 63 highway in the United States

U.S. Route 63 is a major 1,286-mile (2,070 km) north–south United States highway primarily in the Midwestern and Southern United States. The southern terminus of the route is at Interstate 20 in Ruston, Louisiana. The northern terminus is at U.S. Route 2 in Benoit, Wisconsin, about 60 miles (97 km) east of Duluth, Minnesota.

U.S. Route 64 highway in the United States

U.S. Route 64 is an east–west United States highway that runs for 2,326 miles (3,743 km) from Nags Head in eastern North Carolina to just southwest of the Four Corners in northeast Arizona. The western terminus is at U.S. Route 160 in Teec Nos Pos, Arizona. The highway's eastern terminus is at NC 12 and U.S. Route 158 at Whalebone Junction, North Carolina.

U.S. Route 70 highway in the United States

U.S. Route 70 is an east–west United States highway that runs for 2,385 miles (3,838 km) from eastern North Carolina to east-central Arizona. As can be derived from its number, it is a major east–west highway of the Southern and Southwestern United States. It formerly ran from coast to coast, with the current Eastern terminus near the Atlantic Ocean in North Carolina, and the former Western terminus near the Pacific Ocean in California. Before the completion of the Interstate system, U.S. Highway 70 was sometimes referred to as the "Broadway of America", due to its status as one of the main east–west thoroughfares in the nation. It was also promoted as the "Treasure Trail" by the U.S. Highway 70 Association as of 1951.

U.S. Route 421 highway in the United States

U.S. Route 421 (US 421) is a spur route of U.S. 21. It runs for 941 miles (1,514 km) from Fort Fisher, North Carolina south of Wilmington to Michigan City, Indiana at U.S. 20.

U.S. Route 129 highway in the United States

U.S. Route 129 (US 129) is an auxiliary route of US 29, which it intersects in Athens, Georgia. US 129 currently runs for 582 miles (937 km) from an intersection with US 19/US 27 ALT/US 98 in Chiefland, Florida, to an interchange with Interstate 40 (I-40) in Knoxville, Tennessee. It passes through the states of Florida, Georgia, North Carolina, and Tennessee. It goes through the cities of Macon, Athens, Gainesville, and Knoxville.

Tennessee State Route 1 highway in Tennessee

State Route 1 , known as the Memphis to Bristol Highway, is a 538.8-mile-long (867.1 km) mostly-unsigned state highway in the U.S. state of Tennessee. It stretches all the way from the Arkansas state line at Memphis in the southwest corner of the state to Bristol in the northeast part. Most of the route travels concurrently with U.S. Route 70 and US 11W. It is the longest highway of any kind in the state of Tennessee.

Interstate 440 (I-440), also known as the Raleigh Beltline, the Cliff Benson Beltline, or locally as just The Beltline, is an Interstate Highway in the US state of North Carolina. I-440 is a 16.4-mile-long (26.4 km) partial beltway that nearly encircles central Raleigh. I-440 begins in west Raleigh at an interchange with I-40, as a continuation of US Highway 64 /US 1 and traverses a primarily residential area in west Raleigh. The freeway makes a turn toward the east, crossing US 70, Six Forks Road, and Wake Forest Road. US 1 branches north off of I-440 at Capital Boulevard, becoming US 401/US 1. I-440 turns toward the southeast and follows a brief concurrency with US 64 Business before intersecting I-87/US 64/US 264. US 64 is concurrent with I-440 along the remainder of the road's southwesterly routing. Exit 16 is the last exit on I-440, where I-440 splits to become I-40 East and West.

U.S. Route 78 highway in the United States

U.S. Highway 78 is an east–west United States highway that runs for 715 miles (1,151 km) from Memphis, Tennessee, to Charleston, South Carolina. From Byhalia, Mississippi to Birmingham, Alabama, US 78 is designated as Interstate 22. The highway's western terminus is at U.S. Route 70 in Memphis, Tennessee, and its eastern terminus is on Line Street, in Charleston, South Carolina.

Interstate 40 (I-40) is a part of the Interstate Highway System that runs from Barstow, California to Wilmington, North Carolina. In North Carolina, I-40 enters the state along the Pigeon River Gorge, from Tennessee. Crossing the entire state, it connects the cities of Asheville, Winston-Salem, Greensboro, Durham and Raleigh before ending along U.S. Highway 117/North Carolina Highway 132 (US 117/NC 132) in Wilmington. The landscapes traversed by I-40 include the Blue Ridge Mountains, foothills of western North Carolina, suburban communities, the urban core of several Piedmont cities, along with eastern North Carolina farmland. At a total of 423.55 miles (681.64 km), it is the longest interstate highway in North Carolina. There are five auxiliary Interstates in the state related to I-40, as well as one business loop which currently runs through Winston-Salem. The route is labeled east-west for the entire route, however the eastern portion follows a much more north-south alignment.

Interstate 40 (I-40) traverses the entirety of the state of Tennessee from west to east, running from the Mississippi River at the Arkansas border to the northern base of the Great Smoky Mountains at the North Carolina border. The road connects Tennessee's three largest cities—Memphis, Nashville, and Knoxville—and crosses all of Tennessee's physiographical provinces and Grand Divisions—the Mississippi Embayment and Gulf Coastal Plain in West Tennessee, the Highland Rim and Nashville Basin in Middle Tennessee, and the Cumberland Plateau, Appalachian Valley and Ridge Province, and Blue Ridge Province in East Tennessee. The Tennessee section of I-40 is 452 miles (727 km) long, the longest of any state.

Interstate 40 (I-40) is an east–west Interstate Highway that has a 284.69-mile (458.16 km) section in the U.S. state of Arkansas connecting Oklahoma to Tennessee. The route enters Arkansas from the west just north of the Arkansas River near Dora. It travels eastward across the northern portion of the state connecting the cities of Fort Smith, Clarksville, Russellville, Morrilton, Conway, Little Rock, Forrest City, and West Memphis. I-40 continues into Tennessee heading through Memphis. The highway has major junctions with Interstate 540 at Van Buren, Interstate 49 at Alma, Interstate 30 in Little Rock, and Interstate 55 to Blytheville.

Interstate 55 (I-55) is a north–south Interstate Highway that has a 72.22-mile (116.23 km) section in the U.S. state of Arkansas connecting sections in Tennessee and Missouri. The route enters Arkansas on the Memphis & Arkansas Bridge over the Mississippi River from Memphis. It travels northward through northeast Arkansas connecting the cities of West Memphis and Blytheville. I-55 continues into Missouri heading to St. Louis, Missouri. The highway overlaps Interstate 40 in West Memphis and has a junction with Interstate 555, a spur route to Jonesboro, in Turrell. For the majority of its routing through Arkansas, I-55 generally follows U.S. Route 61.

U.S. Route 70 in Tennessee enters the state of Tennessee from Arkansas via the Memphis & Arkansas Bridge in Memphis, and runs west to east across 21 counties in all three grand divisions of Tennessee, with a total length of 478.48 miles (770.04 km), to end at the North Carolina state line in eastern Cocke County. Along the route, US 70 is accompanied with various U.S. and state highways, including those in three of the state’s four major cities.

In Tennessee, U.S. Route 64 stretches from the Mississippi River in Memphis to the North Carolina state line near Ducktown. The highway, along with US 72, is a major route for travel between Memphis and Chattanooga.

Interstate 87 (I-87) is a partially completed Interstate Highway in the U.S. state of North Carolina. Currently serving eastern Wake County, between Raleigh and Wendell, it is planned to continue northeast through Rocky Mount, Williamston and Elizabeth City, ending in Norfolk, Virginia. It is not contiguous with Interstate 87 in New York. It is currently the shortest designated primary interstate highway at 12.9 miles (20.8 km).


  1. 1 2 Adderly, Kevin (January 27, 2016). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2015". Federal Highway Administration . Retrieved February 8, 2017.
  2. Official Route Numbering for the National System of Interstate and Defense Highways (Map). American Association of State Highway Officials. August 14, 1957. Retrieved March 27, 2017.
  3. "I-40 Barstow, Calif., sign gone for good". November 12, 2009. Retrieved September 19, 2011.
  4. Planning and Research Division (2011). General Highway Map, Crawford County, Arkansas (PDF) (Map). 1:62,500. Little Rock: Arkansas State Highway and Transportation Department. Retrieved November 15, 2011.
  5. Planning and Research Division (2009). General Highway Map, Pulaski County, Arkansas (PDF) (Map). 1:62,500. Little Rock: Arkansas State Highway and Transportation Department. Retrieved November 15, 2011.
  6. Planning and Research Division (2009). General Highway Map, Crittenden County, Arkansas (PDF) (Map). 1:62,500. Little Rock: Arkansas State Highway and Transportation Department. Retrieved November 15, 2011.
  7. Tennessee public acts 2001 Chapter 100, Senate Bill 916 House Bill 616 Signed into law April 18, 2001
  8. Tennessee Department of Transportation. "SmartFix: I-40/James White Parkway/Hall of Fame Drive". Tennessee Department of Transportation. Archived from the original on December 31, 2010.
  9. Tennessee Department of Transportation. "SmartFix: I-40/James White Parkway/Hall of Fame Drive". Tennessee Department of Transportation. Archived from the original on April 29, 2009.
  10. "Interstate 40". California Highways. Retrieved November 27, 2011.[ self-published source ]
  11. Waller, Jeff. "Interstate 40 Extension and Bakersfield Freeway Network". California Streets. Retrieved February 18, 2006.[ self-published source ]
  12. Wilshire, Howard (Spring 2001). "Building a Radioactive Highway" (PDF). Desert Report. Sierra Club. pp. 9, 14. Archived from the original (PDF) on March 26, 2009.
  13. "SHC Approves I-40 Link in Wake County". Concord Tribune . Associated Press. July 20, 1971.
  14. Wilson, Amy (January 18, 2002). "U.S. Route 66: Historic Road Is Time Line of America". National Geographic News. Retrieved February 18, 2006.
  15. "Excellence in Highway Design - 2002 I-25/I-40 System-to-System Interchange, Albuquerque, New Mexico". Federal Highway Administration. Retrieved November 27, 2011.
  16. "HWY 25-70 a scenic, tough rock slide detour". Retrieved November 27, 2011.
  17. Hickman, Hayes (April 26, 2010). "Section of I-40 closed since Oct. rockslide reopens". Knoxville News Sentinel. Retrieved April 26, 2010.
  18. "Interstate Highway Types and Interstate History". California Highways. Retrieved March 29, 2019.[ self-published source ]
  19. United States Senate Committee on Public Works Subcommittee on Roads (1970). Report on the Status of the Federal-Aid Highway Program Hearing, Ninety-first Congress, Second Session ... April 15, 1970. Washington, DC: United States Government Printing Office. OCLC   90780 . Retrieved March 29, 2019 via HathiTrust.[ page needed ]

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