Interstate 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 2,556.61 miles (4,114.46 km), it is the third-longest Interstate Highway in the country, after I-90 and I-80. From west to east, it passes through California, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Tennessee, and North Carolina. Its western end is at I-15 in Barstow, California, while its eastern end is at a concurrency of U.S. Route 117 (US 117) and North Carolina Highway 132 (NC 132) in Wilmington, North Carolina. Major cities served by the interstate include Flagstaff, Arizona; Albuquerque, New Mexico; Amarillo, Texas; Oklahoma City, Oklahoma; Little Rock, Arkansas; Memphis, Nashville, and Knoxville in Tennessee; and Asheville, Winston-Salem, Greensboro, Durham, Raleigh, and Wilmington in North Carolina.

Interstate 40 marker

Interstate 40

Route information
Existed1957[2]–present
Major junctions
West end I-15 in Barstow, CA
Major intersections
East end US 117 in Wilmington, NC
Location
CountryUnited States
StatesCalifornia, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Tennessee, North Carolina
Highway system

Much of the western part of I-40, from Barstow to Oklahoma City, parallels or overlays the historic U.S. Route 66. East of Oklahoma City, the route generally parallels US 64 and US 70. I-40 was established by the Federal Aid Highway Act of 1956; the numbering was subsequently approved on August 14, 1957, along with most of the rest of the system. The eastern terminus was initially planned to be located at I-85 in Greensboro, but the Federal Highway Administration later approved extending the route to its current eastern terminus in Wilmington. As a result, this was the last segment of I-40 to be completed upon its dedication in 1990.

Route descriptionEdit

I-40 runs east–west through eight states. The state with the longest segment of the highway is Tennessee; the shortest state segment is in California.

Lengths
  mi[1] km
CA 154.61 248.82
AZ 359.48 578.53
NM 373.51 601.11
TX 177.10 285.01
OK 331.73 533.87
AR 284.69 458.16
TN 455.28 732.70
NC 420.21 676.26
Total 2,556.61 4,114.46

CaliforniaEdit

 
A sign at the start of I-40 in Barstow, California, showing the distance to the freeway's eastern terminus in Wilmington, North Carolina. This sign has been stolen several times.

I-40 in California crosses through the lightly-populated western part of the Inland Empire region of the state. 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. Some signs show the control city for I-40 westbound to be Los Angeles, where drivers would follow I-15 south from its western terminus in Barstow. The highway is four lanes for the entirety of its length in the state.

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

ArizonaEdit

 
I-40 westbound heading toward Flagstaff

I-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 miles (578 km) in Arizona. Just west of exit 190, west of Flagstaff, is its highest elevation along I-40 in the US, as the road crosses just over 7,320 feet (2,230 m). I-40 also passes through the Navajo Nation, the largest Indian reservation in the US. Like California's segment, the highway is four lanes for the entirety of its length in the state.

New MexicoEdit

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 in the state of 7,275 feet (2,217 m) at the Continental Divide in western New Mexico between Gallup and Grants.

Arizona, New Mexico, Texas, Oklahoma, and Arkansas are the five states where I-40 has a speed limit of 75 mph (121 km/h) instead of the 70 mph (110 km/h) limit in California, Tennessee, and North Carolina.[4][5]

TexasEdit

 
An at-grade intersection on I-40 in Texas in 2003

In the west Texas panhandle area, there are several ranch roads connected directly to the Interstate. The only major city in Texas that is directly served by I-40 is Amarillo, which connects with I-27 that runs south toward Lubbock. I-40 also connects to US 287 that runs southeast to Dallas–Fort Worth and US 87/US 287 north to Dumas and then on into Oklahoma. I-40 has only one welcome center in the state, which is located in Amarillo at the exit for Rick Husband Amarillo International Airport, serving both sides of the Interstate.

OklahomaEdit

I-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, I-40 was rerouted one mile (1.6 km) south of its former alignment and a 10-lane (five in each direction) facility replaced the former I-40 Crosstown Bridge; the former I-40 alignment will be replaced with an urban boulevard currently designated as Oklahoma City Boulevard.

ArkansasEdit

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

I-40 enters the west-central part of the state and runs for 285 miles (459 km) in Arkansas. The route passes through Van Buren, where it intersects the southbound I-540/US 71 to Fort Smith.[6] The route continues east to Alma to intersect I-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 I-430, I-30/US 65/US 67/US 167, and I-440/Highway 440 (AR 440).[7] The Interstate continues east through Lonoke, Brinkley, and West Memphis on the eastside. I-40 briefly overlaps I-55 in West Memphis before it crosses the Mississippi River on the Hernando de Soto Bridge and enters Memphis, Tennessee.[8]

TennesseeEdit

 
I-40 in Nashville

The State of Tennessee has the longest segment of I-40 at 455 miles (732 km). 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 through which I-40 passes. Before leaving the state, I-40 enters the Great Smoky Mountains toward North Carolina.

The section of I-40 which runs between Memphis and Nashville is often referred to as the Music Highway.[9] During reconstruction, a short 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 I-640, the northern bypass route. The redesigned section now has additional lanes in each direction, is less congested, and has fewer accidents.[10][11]

North CarolinaEdit

Sign displaying distance to Barstow in Wilmington. This sign is no longer posted by NCDOT due to the frequency of its theft.[12]
Beginning of I-40 west, Wilmington

In North Carolina, I-40 travels 420 miles (680 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 US 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.

A standard distance sign existed near the start of the westbound section of I-40 in Wilmington that indicated the distance to Barstow, California, as 2,554 miles (4,110 km). Although NCDOT stated[when?] it would not be replaced after frequent thefts, as of August 15, 2013, the sign was still present. However, between 2013 and 2020, the sign and base were removed, replaced by a sign proclaiming the stretch as the Michael Jordan Freeway.

HistoryEdit

Predecessor routesEdit

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 1857–1859 by a team led by Lt. Edward Fitzgerald Beale using a team of camels as pack animals.

Planning and controversiesEdit

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 Avenue at both ends of the city.

In 1957, the California Department of Highways proposed that the route be renumbered to I-30 instead because of the already existing US 40 in the state. Then, US 40 was decommissioned in California in 1964 as a part of a major revamping of California's overall highway numbering system, so the problem was resolved.[13][self-published source] The California state government submitted State Route 58 (SR 58) between Barstow and Bakersfield for I-40 extension potential in 1956 and 1968, though those requests were rejected.[14][self-published source] This portion of SR 58 was once signed as the US 466.

From 1963 to 1966, the US government considered a plan, part of Project Plowshare, to use atomic bombs to excavate a path for I-40 through California. The project was canceled largely due to the cost of developing the explosives and due to the unavailability of a "clean bomb".[15]

In Memphis, I-40 was originally intended to go through the city's Overton Park toward downtown. Several miles of freeway were actually built within the I-240 loop. That portion of highway 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]

ConstructionEdit

The first stretch of I-40 in Tennessee reused a short freeway in Knoxville called the Magnolia Avenue Expressway, which was opened in two segments in 1952 and 1955. The stretch between Memphis and Nashville, completed on July 24, 1966, was the first major stretch of interstate highway completed in the state.[16] The last original planned stretch of the highway in Tennessee, located east of Knoxville, was partially opened on December 20, 1974,[17] and fully opened on September 12, 1975.[18]

In 1971, the North Carolina State Highway Commission approved a plan to extend I-40 from Research Triangle Park to I-95, a distance of 41 miles (66 km), at a cost of $75 million (equivalent to $374.51 million in 2020[19]). 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.[20] When the last portion of I-40, connecting Wilmington to Raleigh, was dedicated on June 29, 1990, CBS journalist Charles Kuralt stated:

Thanks to the interstate highway system, it is now possible to travel from coast to coast without seeing anything.[21][22]

Major projectsEdit

Between May 1980 and March 1982, a major project was conducted on I-40 in Knoxville that widened the route, eliminated several interchanges, added frontage roads, and reconstructed the congestion-prone cloverleaf interchange with I-75, which had earned the nickname "Malfunction Junction", into a three-level stack interchange.[23][24] This was conducted as part of a larger $250 million (equivalent to $579 million in 2020[19]) road improvement project in the Knoxville area in preparation for the 1982 World's Fair.[25][26]

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 (I-40 Bus.), establishing a business route that was actually an expressway for its entire length, a rarity among business routes. Following a reconstruction, the expressway was renamed Salem Parkway and redesignated as part of US 421.

The "Big I" interchange in Albuquerque between I-40 and I-25 was reconstructed between 2000 and 2002 in a project that eliminated left-hand entrance ramps and added lanes. This project was given an honorable mention by the United States Department of Transportation and the FHWA for excellence in urban highway design in 2002.[27]

The Oklahoma City Crosstown Expressway was relocated and replaced with a new wider alignment in two phases between May 2002 and October 2012. The old alignment was replaced with Oklahoma City Boulevard, and at-grade thoroughfare.[28]

In Memphis, the cancellation of the Overton Park stretch of I-240, along with increased traffic volumes and safety hazards, rendered both interchanges with I-240 unable to effectively handle unplanned traffic patterns, thus necessitating their reconstruction. This was accomplished in three phases between January 2001 and December 2016.[29][30][31][32]

A $203.7 million two-phase project dubbed "SmartFix 40" resulted in a complete closure of a short stretch of I-40 through Knoxville between May 1, 2008, and June 12, 2009.[33] This was done in order to accelerate the construction timeline, and during this time, through traffic was required to use I-640.[34] Both phases of the project won an America's Transportation Award from AASHTO in 2008 and 2010, respectively.[35][36]

Geological difficultiesEdit

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, I-40 was closed at the North Carolina and Tennessee border due to a landslide at milemarker 2.6 just east of the Tennessee state line. All traffic was detoured via I-26 and I-81, and non-heavy-load traffic via US 25 and US 70.[37] The roadway was reopened on April 25, 2010, with some remaining limitations on westbound traffic.[38]

Major incidentsEdit

 
The collapsed section of the I-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 (180 m) section of the I-40 bridge to plunge into the Arkansas River. Automobiles and semitrailers fell into the water, killing 14 people.

On May 11, 2021, the Hernando de Soto Bridge carrying I-40 over the Mississippi River was closed following the discovery of a split in one of the bridge members.[39]

Major junctionsEdit

California
  I-15 in Barstow
  US 95 west-northwest of Needles. The highways travel concurrently to Needles.
Arizona
   Future I-11 / US 93 in Kingman. The highways travel concurrently to east-northeast of Kingman.
  I-17 in Flagstaff
   US 89 / US 180 in Flagstaff. I-40/US 180 travels concurrently to Holbrook.
  US 191 in Chambers. The highways travel concurrently to Sanders.
New Mexico
  US 491 in Gallup
   I-25 / US 85 in Albuquerque
  US 285 in Clines Corners
  US 84 west-northwest of Santa Rosa. The highways travel concurrently to Santa Rosa.
  US 54 in Santa Rosa. The highways travel concurrently to Tucumcari.
Texas
  US 385 in Vega
     I-27 / US 60 / US 87 / US 287 in Amarillo. I-40/US 287 travels concurrently through Amarillo.
  US 83 in Shamrock
Oklahoma
  US 283 in Sayre
  US 183 in Clinton
  US 281 in Hinton
  US 270 west of El Reno. The highways travel concurrently to northwest of Shawnee.
  US 81 in El Reno
  I-44 in Oklahoma City
     I-35 / I-235 / US 62 / US 77 in Oklahoma City. I-35/I-40/US 62 travels concurrently through Oklahoma City.
  I-240 in Oklahoma City
   US 177 / US 270 northwest of Shawnee
  US 377 south-southeast of Prague
  US 62 in Okemah. The highways travel concurrently to Henryetta.
  US 75 northeast of Clearview. The highways travel concurrently to Henryetta.
  US 69 southwest of Checotah
  US 266 in Warner
  US 59 in Sallisaw
  US 64 in Sallisaw
  US 64 in Roland
Arkansas
   I-540 / US 71 in Van Buren. I-40/US 71 travels concurrently to Alma.
  I-49 in Alma
  US 64 in Clarksville
  US 64 in Lamar
  US 64 in London
  US 65 in Conway. The highways travel concurrently to North Little Rock.
  US 64 in Conway
  I-430 in North Little Rock
      I-30 / Future I-57 / US 65 / US 67 / US 167 in North Little Rock. I-40/US 67/US 167 travels concurrently through North Little Rock.
  I-440 in North Little Rock
  US 63 in Hazen. The highways travel concurrently to West Memphis.
  US 49 in Brinkley
  US 79 south of Jennette. The highways travel concurrently to West Memphis.
     I-55 / US 61 / US 63 / US 64 in West Memphis. I-40/I-55/US 61/US 64 travels concurrently through West Memphis.
Tennessee
  US 51 in Memphis
   I-69 / I-240 in Memphis. I-40/I-69 travels concurrently through Memphis.
    US 64 / US 70 / US 79 in Memphis
  US 64 on the Memphis–Bartlett city line
  I-269 in Arlington
  US 70 east of Brownsville
  US 412 in Jackson. The highways travel concurrently to northeast of Jackson.
  US 45 in Jackson
   US 70 / US 412 northeast of Jackson
  US 641 southeast of Holladay
  I-840 southeast of Burns
  US 70S in Nashville
  US 70 in Nashville
  SR 155 in Nashville
  I-440 in Nashville
  I-65 in Nashville. The highways travel concurrently through Nashville.
  US 70 in Nashville
    US 70 / US 70S / US 431 in Nashville
   US 31A / US 41A in Nashville
  I-24 in Nashville. The highways travel concurrently through Nashville.
  I-840 in Lebanon
  US 231 in Lebanon
  US 70 in Lebanon
  SR 111 in Cookeville
  US 70N in Cookeville
  US 70N in Monterey
  US 127 in Crossville
  US 27 in Harriman
  US 321 in Lenoir City
  I-75 west of Farragut. The highways travel concurrently to Knoxville.
  I-140 in Knoxville
   US 11 / US 70 in Knoxville
   I-75 / I-640 in Knoxville
  US 129 in Knoxville
  I-275 in Knoxville
  US 441 in Knoxville
  US 11W in Knoxville
   I-640 / US 25W in Knoxville. I-40/US 25W travels concurrently through Knoxville.
    US 11E / US 25W / US 70 in Knoxville
   US 25W / US 70 west of Dandridge
  I-81 north-northeast of Dandridge
    US 25W / US 70 / US 411 in Newport
  US 321 in Newport
North Carolina
  US 276 in Cove Creek
  US 74 north-northwest of Clyde. The highways travel concurrently to Asheville.
   US 19 / US 23 in Asheville
    I-26 / I-240 / US 74 in Asheville
  US 25 in Asheville
  I-240 in Asheville
  US 70 in Black Mountain. The highways travel concurrently to southwest of Old Fort.
  US 221 southeast of West Marion
  US 64 in Morganton
  US 321 in Hickory
  US 64 in Statesville
  US 21 in Statesville
  I-77 in Statesville
  US 64 in Statesville
  US 64 east-northeast of Statesville
  US 64 west-northwest of Mocksville
  US 601 in Mocksville
  US 421 in Winston-Salem
  US 158 in Winston-Salem
   US 52 / I-285 in Winston-Salem
  I-74 in Winston-Salem
  US 421 west of Greensboro. The highways travel concurrently to Greensboro.
    I-73 / US 421 / I-840 in Greensboro
  US 220 in Greensboro. The highways travel concurrently through Greensboro.
   US 29 / US 70 in Greensboro. The highways travel concurrently through Greensboro.
    I-85 / I-840 / I-785 in Greensboro. I-40/I-85 travels concurrently to southwest of Hillsborough.
   US 15 / US 501 in Durham
  I-885 in Durham
  I-540 in Durham
    I-440 / US 1 / US 64 in Raleigh. I-40/US 64 travels concurrently through Raleigh.
   US 70 / US 401 in Raleigh
    I-87 / I-440 / US 64 in Raleigh
  US 70 in Garner. The highways travel concurrently to west-southwest of Clayton.
   
   Future I-42 / US 70 near Clayton.
  I-95 in Benson
  US 701 south-southeast of Newton Grove
  US 117 south-southeast of Warsaw
  US 117 east-southeast of Willard
  I-140 in Murraysville
  US 117 on the Kings Grant–Murraysville CDP line

Auxiliary routesEdit

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 routesEdit

In popular cultureEdit

Interstate 40 plays a major role in the 2006 Disney/Pixar animated film Cars. The film takes place in the fictional town of Radiator Springs located along US 66 and tells about how Radiator Springs was once a popular stop along US 66 until it was bypassed by I-40 and was mostly forgotten.[citation needed] The city of Holbrook, AZ was the inspiration for the movie.[citation needed]

See alsoEdit

ReferencesEdit

  1. ^ a b Starks, Edward (May 6, 2019). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2018". Federal Highway Administration. Retrieved October 22, 2021.
  2. ^ American Association of State Highway Officials (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways (Map). Scale not given. Washington, DC: American Association of State Highway Officials. Retrieved March 27, 2017 – via Wikimedia Commons.
  3. ^ "I-40 Barstow, Calif., sign gone for good". StarNewsOnline.com. November 12, 2009. Retrieved October 20, 2020.
  4. ^ "Speed limit on much of I-40, I-35 raised to 75 MPH".
  5. ^ "Speed limit on I-40 in the River Valley increases to 75 MPH".
  6. ^ 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.
  7. ^ 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.
  8. ^ 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.
  9. ^ Tennessee public acts 2001 Chapter 100, Senate Bill 916 House Bill 616 Signed into law April 18, 2001, http://www.tennessee.gov/sos/acts/102/pub/pc0100.pdf
  10. ^ 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.
  11. ^ 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.
  12. ^ Star News, Staff Reports. "I-40 Barstow, Calif., sign gone for good". Star News Online. Star News. Retrieved October 15, 2020.
  13. ^ "Interstate 40". California Highways. Retrieved November 27, 2011.[self-published source]
  14. ^ Waller, Jeff. "Interstate 40 Extension and Bakersfield Freeway Network". California Streets. Retrieved February 18, 2006.[self-published source]
  15. ^ 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.
  16. ^ Veazey, Walter (July 25, 1966). "A Giant Of Progress Grows 195 Miles". The Commercial Appeal. Memphis. p. 1. Retrieved December 10, 2021 – via Newspapers.com.
  17. ^ Yarbrough, William (December 21, 1974). "All Interstates in ET Open; Dunn Dedicates New Sections". The Knoxville News-Sentinel. pp. 1, 14. Retrieved December 30, 2021.
  18. ^ "I-40 Link Opening Near Knoxville". The Tennessean. Nashville. Associated Press. September 11, 1975. p. 11. ISSN 1053-6590. Retrieved April 18, 2019.
  19. ^ a b Johnston, Louis; Williamson, Samuel H. (2022). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved February 12, 2022. United States Gross Domestic Product deflator figures follow the Measuring Worth series.
  20. ^ "SHC Approves I-40 Link in Wake County". Concord Tribune. Associated Press. July 20, 1971.
  21. ^ Wilson, Amy (January 18, 2002). "U.S. Route 66: Historic Road Is Time Line of America". National Geographic News. Retrieved February 18, 2006.
  22. ^ "I-40 Fact Sheet" (PDF). North Carolina Department of Transportation. June 21, 2008. Archived from the original (PDF) on June 21, 2008. Retrieved June 20, 2014.
  23. ^ "Interstate Work Ahead of Schedule; 3 Contracts Signed". The Knoxville News-Sentinel. April 29, 1980. p. 21. Retrieved December 30, 2021 – via Newspapers.com.
  24. ^ "Junction Bottleneck Officially Broken". The Knoxville News-Sentinel. March 31, 1982. p. C-1. Retrieved November 19, 2021 – via Newspapers.com.
  25. ^ Knoxville-Knox County Metropolitan Planning Commission; Barton-Aschman Associates; Knoxville International Energy Exposition; K-Trans (December 1982). 1982 World's Fair Transportation System Evaluation (Report). Office of Planning Assistance, Urban Mass Transportation Administration. DOT-I-83-4. Retrieved June 6, 2020 – via Google Books.
  26. ^ Hunt, Keel (2018). Crossing the Aisle: How Bipartisanship Brought Tennessee to the Twenty-First Century and Could Save America. Nashville: Vanderbilt University Press. pp. 101–102, 117–129, 122. ISBN 978-0-8265-2241-2 – via Google Books.
  27. ^ "Excellence in Highway Design - 2002 I-25/I-40 System-to-System Interchange, Albuquerque, New Mexico". Federal Highway Administration. Retrieved November 27, 2011.
  28. ^ "I-40 Crosstown Realignment". Oklahoma City: MacArthur Associated Consultants. Retrieved May 7, 2022.
  29. ^ Adams, Tracy (June 26, 2003). "Honk if you like I-40 relief". The Commercial Appeal. Memphis. p. A1. Retrieved January 30, 2022 – via Newspapers.com.
  30. ^ "TDOT sharpens listening skills". The Commercial Appeal. Memphis. October 17, 2003. p. B4. Retrieved January 30, 2022 – via Newspapers.com.
  31. ^ "I-40 / I-240 Interchange – Phase II". Dement Construction Company. 2016. Retrieved February 16, 2020.
  32. ^ Charlier, Tom (December 10, 2006). "Midtown I-40/240 Project Wraps Up; Dangerous curves led to deaths of 8 in 1988". The Commercial Appeal. Memphis. p. B1, B7. Retrieved November 26, 2021 – via Newspapers.com.
  33. ^ "Interstate 40 Reopens In Knoxville 18 days ahead of schedule". Tennessee Government Newsroom. Nashville. Tennessee Department of Transportation. June 12, 2009. Archived from the original on June 15, 2009.
  34. ^ Jacobs, Don (April 13, 2008). "Downtown's 14-month I-40 shutdown will mean new routes, potential surprises". The Knoxville News-Sentinel. Retrieved January 31, 2021.
  35. ^ "TN: SmartFix40". americastransportationawards.org. American Association of State Highway and Transportation Officials. 2008. Retrieved January 31, 2021.
  36. ^ "TN: SmartFIX40 Phase 2 Knoxville Project". americastransportationawards.org. American Association of State Highway and Transportation Officials. 2010. Retrieved January 31, 2021.
  37. ^ "HWY 25-70 a scenic, tough rock slide detour". Volunteertv.com. Retrieved November 27, 2011.
  38. ^ Hickman, Hayes (April 26, 2010). "Section of I-40 closed since Oct. rockslide reopens". Knoxville News Sentinel. Retrieved April 26, 2010.
  39. ^ "Urgent 911 calls after major crack found in Interstate 40 bridge linking Arkansas and Tennessee". CBS News. May 15, 2021. Retrieved May 17, 2021.

External linksEdit

Route map:

KML is from Wikidata