Interstate 20

"I-20" redirects here. For other uses, see I-20 (disambiguation).

Interstate 20 marker

Interstate 20
Route information
Length: 1,539.38 mi[1] (2,477.39 km)
Existed: 1957 – present
Major junctions
West end: I-10 at Scroggins Draw, TX
East end: I-95 / I-20 Bus. near Florence, SC
States: Texas, Louisiana, Mississippi, Alabama, Georgia, South Carolina
Highway system

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.[2] Between Texas and South Carolina, I‑20 runs through northern Louisiana, central Mississippi, western and north-central Alabama, and north-central Georgia. I‑20 intersects seven of the ten primary north–south Interstates (all except I‑5, I‑15, and I‑25) and also the east-west Interstates 10 and 30.

From its terminus at I‑95, the highway continues about 2 miles (3.2 km) eastward into the city of Florence as Business Spur 20.

Route description

TX 636.08 1023.67
LA 189.87 305.57
MS 154.61 248.82
AL 214.7 345.5
GA 202.61 326.07
SC 141.51 227.74
Total 1539.4 2477.4


I-20 in southern Fort Worth

I-20 begins 10 miles (16 km) east of Kent at a fork with I-10. From there, the highway travels east-northeastward through Odessa, Midland, and Abilene before turning eastward towards Dallas/Fort Worth. The La Entrada al Pacifico corridor runs along I-20 between U.S. Route 385 (US 385) and Farm to Market Road 1788 (FM 1788). Between Monahans and I-10, I-20 has an 80 miles per hour (130 km/h) speed limit.

From the highway's opening in the 1960s through 1971, I-20 originally went through the heart of the Metroplex via the Dallas-Fort Worth Turnpike. This old route is now signed I-30 (Dallas-Fort Worth Turnpike), US 80 (former stretch between I-635 and Terrell) and Texas Spur 557 (bypass around Terrell).

In 1987, I-20 was rerouted to go through the southern sections of Fort Worth, Arlington, Grand Prairie, Dallas, and Mesquite before rejoining its original route at Terrell. Part of I-20 in Dallas is named the Lyndon B. Johnson Freeway and used to be signed as I-635.

I-20 continues eastward from Terrell, bypassing Tyler, Marshall, and Longview, before crossing the Louisiana border near Waskom.


In Louisiana, I-20 roughly parallels U.S. Route 80 through the northern part of the state.

Entering the state from near Waskom, Texas, the highway immediately enters the Shreveport-Bossier City metropolitan area, intersecting I-49 near downtown Shreveport and passing close to Barksdale Air Force Base in Bossier City.

From that area, the highway traverses mainly rural, hilly terrain, bypassing Minden, Ruston and Grambling before reaching Monroe.

From Monroe, I-20 enters flatter terrain as it approaches the Mississippi River. Before crossing the Mississippi, the highway passes Tallulah. At the Mississippi River, I-20 leaves Louisiana and enters Vicksburg, Mississippi.


A photo of the state welcome sign westbound.

Upon entering Mississippi by crossing the Mississippi River, I-20 immediately enters Vicksburg. Between Edwards and Clinton, the highway mostly follows the original two-lane routing of US 80. In Jackson, I-20 sees a short concurrency with both I-55 and US 49. Also in Jackson is an unusually expansive stack interchange, at the junction of I-20, I-55 North and US 49 South. The interchange replaces a former directional interchange at I-55 North and a cloverleaf at Highway 49. From the Stack, I-20 continues eastward to Meridian, where it begins the nearly 160-mile (260 km) overlap with I-59.

The route of the Mississippi section of I-20 is defined in Mississippi Code § 65-3-3.


I-20 (co-signed with I-59) approaching I-65 in downtown Birmingham. This is sometimes referred to as Malfunction Junction.

I-20 (along with I-59) crosses the Alabama state line near York, and it stays conjoined as it passes through western Alabama and Tuscaloosa. At Birmingham, the two highways pass through downtown together before splitting at Exit 130 just east of the Birmingham airport. I-20 continues eastward through Oxford/Anniston, Alabama, and the Talladega National Forest, passing by the Talladega Superspeedway in the process, which is visible from the highway.

Also in Birmingham, the intersection of I-20 / I-59 and I-65 is known as a Malfunction Junction because of the interchange's somewhat-confusing design, and the number of traffic accidents that occur there.


I-20 eastbound at I-520 interchange, in Augusta, GA

I-20 enters Georgia near Tallapoosa and after passing through western Georgia, it enters the Atlanta metropolitan area. On clear days, eastbound motorists get their first view of downtown Atlanta as they come over the top of the Six Flags Hill. The Six Flags Over Georgia amusement park is easily visible off exit 46 eastbound. The highway then passes through the center of Atlanta, meeting with I-75 and I-85, which share a common expressway (the "Downtown Connector"). It continues through Metropolitan Atlanta eastward and through the eastern half of Georgia until it exits the state, crossing the Savannah River at Augusta.

Throughout the state, I-20 is conjoined with unsigned State Route 402 (SR 402). Also, I-20 from the Alabama state line to I-285 in Atlanta is named the "Tom Murphy Freeway", but it is called the "Ralph David Abernathy Freeway" within I-285. The Interstate Highway is also named the Purple Heart Highway from I-285 in DeKalb County to US 441 in Madison, Georgia, and it is called the Carl Sanders Highway from US 441 to the South Carolina state line.

South Carolina

Approaching the eastern terminus of I-20 on I-95, Florence, SC

Upon leaving Augusta, I-20 crosses the Savannah River and enters the Palmetto State and heads northeastward, bypassing Aiken and Lexington before reaching the state capital of Columbia, which can be reached most directly by taking I-26 east at Exit 64 ("Malfunction Junction"), then, almost immediately, I-126 / US 76.

At Columbia, I-20 bypasses the city to the north and again turns northeastward, bypassing Fort Jackson and Camden. After crossing the Wateree River, it turns due east, passes by tiny Bishopville, before reaching the Florence area. It is near Florence where I-20 sees its eastern terminus at Interstate 95. However, for about two miles (3 km), the highway continues into Florence as Business Spur 20.

I-20 in the Palmetto State is known as either the J. Strom Thurmond Freeway or John C. West Freeway. The first section to be completed was the bridge over the Savannah River in 1965; the last, the section between US 401 and I-95 (including the business spur), opened in August 1975.


Exit numbers of I-20 were changed in Georgia in 2000.[3]


In 2003, the North Carolina Department of Transportation proposed extending I-20 eastward from Florence to Wilmington at the behest of North Carolina Governor Mike Easley and his 'Strategic Transportation Plan' for the southeast portion of the state.[4][5] The proposed route would follow US 76 east from Florence to Whiteville, North Carolina, then parallel US 74 / US 76 into Wilmington.[6] Part of this route is already designated the future eastern extension of I-74. As part of the 2005 SAFETEA-LU transportation legislation, North Carolina received $5 million for a feasibility study for this extension.[4] While this extension has considerable support among towns in southeastern North Carolina, the South Carolina DOT has stated that they have no interest in upgrading their portion of US 76 to an interstate. Instead, South Carolina is concentrating their efforts on plans to build I-73 that will terminate near Myrtle Beach. This proposed extension has not been approved by the Federal Highway Administration or the AASHTO, so any construction remains far in the future, but NCDOT maintains the routing in its Strategic Highway Corridors maps.[7]

Junction list

I10 east-northeast of Kent
US 285 in Pecos
US 385 in Odessa
US 87 in Big Spring
US 84 east of Roscoe. The highways travel concurrently to the TyeAbilene city line.
US 83 / US 277 in Abilene
US 283 in Baird
US 183 in Cisco
US 281 south-southeast of Brazos
US 180 in Hudson Oaks
I30 northeast of Aledo
I820 in Fort Worth
US 377 in Benbrook
I35W in Fort Worth
I820 / US 287 in Fort Worth. I-20/US 287 travels concurrently to Arlington.
US 67 in Dallas
I35E on the Dallas–Lancaster city line
I45 on the Dallas–Hutchins city line
US 175 on the Dallas–Balch Springs city line
I635 in Balch Springs
US 69 in Lindale
US 271 south-southeast of Winona
US 259 northeast of Kilgore. The highways travel concurrently to Longview.
Future I369 / US 59 in Marshall
US 80 west-southwest of Jonesville. The highways travel concurrently to west of Waskom.
US 79 / US 80 in Greenwood
US 80 in Shreveport
I220 in Shreveport
US 171 in Shreveport
US 79 / US 80 in Shreveport
I49 in Shreveport
US 71 in Shreveport. The highways travel concurrently to Bossier City.
I220 in Bossier City
US 371 in Dixie Inn. The highways travel concurrently to Minden.
US 80 southeast of Minden
US 63 / US 167 in Ruston
US 80 east-northeast of Calhoun
US 165 in Monroe
US 425 in Rayville
US 65 in Tallulah
US 80 in Delta. The highways travel concurrently to Clinton, Mississippi.
US 61 in Vicksburg. The highways travel concurrently through Vicksburg.
I220 / US 49 in Jackson. I-20/US 49 travels concurrently to Pearl.
I55 / US 51 in Jackson. I-20/I-55 travels concurrently to Richland
US 80 in Brandon
US 80 in Brandon
US 80 east-southeast of Lake
US 80 west-southwest of Meridian. The highways travel concurrently to Meridian.
I59 in Meridian. The highways travel concurrently to Birmingham.
US 11 in Meridian. The highways travel concurrenty through Meridian.
US 45 in Meridian
US 11 / US 80 west-northwest of Kewanee
US 11 / US 43 south of Knoxville
I359 / US 11 in Tuscaloosa
US 82 in Tuscaloosa
US 11 in Tuscaloosa
US 11 in Tuscaloosa
US 11 south of Lake View. The highways travel concurrently to Bessemer.
I459 southwest of McCalla
US 78 in Birmingham
I65 in Birmingham
US 31 / US 280 in Birmingham
US 11 in Birmingham
I459 in Irondale
US 78 in Leeds
US 411 on the Leeds–Moody line
US 78 northwest of Cooks Springs. The highways travel concurrently to Pell City.
US 231 in Pell City
US 78 in Riverside
US 431 east of Oxford
US 27 in Bremen
I285 in Atlanta
I75 / I85 in Atlanta
US 23 / US 19 / US 29 / US 41 in Atlanta
I285 on the PanthersvilleCandler-McAfee CDP line
US 278 southeast of Lithonia. The highways travel concurrently to Covington.
US 278 in Social Circle
US 129 / US 441 in Madison
US 278 in Barnett
US 221 south of Appling
I520 in Augusta
South Carolina
US 25 in North Augusta
I520 in North Augusta
US 1 north-northeast of Aiken
US 178 southeast of Batesburg-Leesville
US 1 east of Lexington
US 378 north of Oak Grove
I26 / US 76 on the Seven OaksSt. Andrews CDP line
US 176 in St. Andrews
US 321 north of Columbia
US 21 in Columbia
US 1 in Dentsville
I77 on the Dentsville–Woodfield CDP line
US 601 in Lugoff
US 521 in Camden
US 15 southwest of Bishopville
US 401 northeast of Lamar
I95 in Florence

Auxiliary routes

Two I-420s were planned, but never completed or built. One was to be a bypass around Monroe, Louisiana, but was never built. The other I-420 was planned as a bypass to the south of downtown Atlanta. Due to anti-freeway sentiments, this I-420 was never completed, and the already-built portion has been signed as GA 154 / GA 166, named Langford Parkway (formerly the Lakewood Freeway).

See also


  1. 1 2 "Route Log and Finder List — Interstate System: Table 1". FHWA. Retrieved 2007-09-26.
  2. Google (2008-02-15). "overview map of I‑20" (Map). Google Maps. Google. Retrieved 2008-02-15.
  3. "Interstate exit signs to get new numbers in Georgia". Jacksonville. Retrieved 17 January 2015.
  4. 1 2 Robert Malme. "Interstate 20 in North Carolina?". I-73/I-74 in North Carolina. Retrieved 2009-07-07.
  5. "Strategic Highway Corridors". NCDOT. Retrieved 2009-07-07.
  6. "Strategic Highway Corridors Vision Plan" (PDF). Strategic Highway Corridors. NCDOT. 2008-07-10. Retrieved 2009-07-07.
  7. "Strategic Highway Corridors Vision Plan, Southeastern NC" (PDF). Strategic Highway Corridors. NCDOT. 2004-09-02. Retrieved 2009-07-07.

Route map: Bing / Google

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