Interstate 20
Interstate 20 (I-20) is a major east–west Interstate Highway in the Southern United States, extending approximately 1,539 miles (2,477 km) from its western terminus at an interchange with Interstate 10 in Reeves County, Texas, to its eastern terminus at an interchange with Interstate 95 near Florence, South Carolina. The route traverses six states—Texas, Louisiana, Mississippi, Alabama, Georgia, and South Carolina—serving as a vital link for interstate commerce, travel, and evacuation. In Texas alone, it spans 636 miles (1,024 km), primarily with four or more lanes, facilitating heavy freight movement through the Permian Basin oil region and the Dallas–Fort Worth metroplex.[1] Designated as part of the Dwight D. Eisenhower National System of Interstate and Defense Highways under the Federal-Aid Highway Act of 1956, I-20 was established to provide high-mobility, controlled-access roadways with minimum design standards including 12-foot lanes, 10-foot shoulders, and speeds of 50–70 mph.[2] Construction across its path began in the late 1950s, with segments opening progressively through the 1960s and 1970s; for instance, the Texas portion was fully designated by 1959. The highway overlaps with other Interstates in places, such as I-59 for 153 miles (246 km) through Alabama and Mississippi, enhancing connectivity.[3] I-20 connects key economic hubs, including Midland–Odessa and Abilene in Texas; Shreveport in Louisiana; Jackson in Mississippi; Birmingham in Alabama; Atlanta in Georgia; and Columbia in South Carolina, supporting industries like energy, manufacturing, and logistics. It carries significant truck traffic, with ongoing improvements such as widening projects in Texas (to six lanes over 82 miles in East Texas) and Louisiana addressing congestion and safety.[4][5] As a designated National Highway System route, it remains essential for national defense and economic vitality, with average daily traffic exceeding 100,000 vehicles in urban sections like Atlanta.Overview
Route designation and length
Interstate 20 is designated as an east–west primary route in the Dwight D. Eisenhower National System of Interstate and Defense Highways, approved in 1957 as part of the original 41,000-mile (66,000 km) national network authorized by the Federal-Aid Highway Act of 1956.[6][7] The highway measures 1,539 miles (2,477 km) in total length, ranking it among the longest primary Interstates in the United States.[8] It begins at its western terminus, an interchange with Interstate 10 near Kent in Reeves County, Texas, and ends at its eastern terminus, an interchange with Interstate 95 in Florence County, South Carolina.[8] The route's length is distributed across six states as follows: Texas (636 miles), Louisiana (190 miles), Mississippi (155 miles), Alabama (214 miles), Georgia (154 miles), and South Carolina (190 miles).[8] Along its path, Interstate 20 connects major urban centers including Dallas and Fort Worth in Texas, Shreveport in Louisiana, Jackson in Mississippi, Birmingham in Alabama, Atlanta in Georgia, and Columbia in South Carolina.[8]States traversed and major cities
Interstate 20 (I-20) spans six states in the Southern United States, extending from west to east through Texas, Louisiana, Mississippi, Alabama, Georgia, and South Carolina.[9] This east-west corridor originates near Kent, Texas, at an interchange with I-10 and terminates in Florence, South Carolina, providing essential connectivity across diverse geographic and economic landscapes. The highway serves as a vital link for several major metropolitan areas, including the Dallas–Fort Worth metroplex and the Midland–Odessa region in Texas, which are key hubs for commerce and energy production. In Louisiana, it connects the Shreveport–Bossier City area, a center for manufacturing and logistics.[9] Further east, I-20 passes through Jackson, the capital of Mississippi and a major transportation node; Birmingham, Alabama's largest city and an industrial powerhouse; Atlanta, Georgia's bustling economic core; and both Columbia, South Carolina's state capital, and the Augusta metropolitan area straddling the Georgia-South Carolina border.[9] I-20 plays a crucial role in regional connectivity by bridging the oil-rich Permian Basin fields in West Texas to manufacturing and distribution centers in the Southeast, ultimately supporting trade routes to Atlantic ports such as those in Charleston and Savannah.[10] This linkage facilitates the movement of goods, energy resources, and passengers across the South, enhancing economic integration from the energy sector to coastal export facilities. While traversing bustling urban environments in these cities, the route predominantly features rural segments, alternating between developed corridors and open countryside that characterize much of the Southern interior.[9]Route description
Texas
Interstate 20 in Texas spans 636 miles from its western terminus at an interchange with Interstate 10 in Reeves County, near Scroggins Draw in rural West Texas, to the Louisiana state line in Harrison County east of Waskom.[11][12] The route traverses 18 counties, beginning in arid desert terrain and progressing eastward through oil-rich prairies, urban centers, and forested regions.[11] From the I-10 junction southwest of Pecos, I-20 passes through the city of Pecos and continues to Monahans in the Permian Basin oil region, where it supports substantial energy sector activity amid high volumes of truck traffic transporting crude oil and related goods.[13][10] The highway then enters the Midland–Odessa metropolitan area, featuring interchanges with U.S. Highway 385 and State Loop 250, before curving northeast toward Abilene, where business loop routes provide local access through the city.[11] East of Abilene, the route maintains a generally eastward trajectory across central Texas prairies, entering the Dallas–Fort Worth metropolitan area, paralleling the historic alignment of U.S. Route 80. It passes through Arlington, intersects Interstate 820, and meets the split segments of Interstate 35 (I-35E and I-35W) before proceeding southeast through Fort Worth and into Dallas, where it crosses Interstate 30, Interstate 635, and Interstate 45.[11] Beyond Dallas, I-20 exits the urban core via Terrell, transitioning into the rural piney woods of East Texas, and reaches Waskom near the Louisiana border, adjacent to the planned extension of Interstate 49.[11] The segment experiences unique challenges, including elevated truck traffic in the Permian Basin—where truck percentages reach up to 53% in some western segments (such as Pecos to Odessa)—contributing to safety and capacity concerns, as well as severe urban congestion in the Dallas–Fort Worth area, which ranks among the worst along the entire corridor. Ongoing widening projects, including an 11-mile expansion in the Permian Basin set for completion in early 2026, aim to address these concerns.[10][10][14]Louisiana
Interstate 20 enters Louisiana from Texas near the town of Waskom, immediately west of Greenwood in Caddo Parish. The route spans 189.9 miles across northern Louisiana, traversing urban centers and rural landscapes before reaching the Mississippi state line in Madison Parish. Upon entering the state, I-20 quickly approaches the Shreveport–Bossier City metropolitan area, where it features major interchanges with Interstate 49 to the south, Louisiana Highway 3132 (the Inner Loop Expressway), and Louisiana Highway 1.[15][16][17] The highway bypasses central Shreveport along a northern alignment, crossing the Red River into Bossier Parish via the Jimmie Davis Bridge. East of the metro area, I-20 passes through smaller communities such as Minden in Webster Parish and Ruston in Lincoln Parish, characterized by rolling hills and forested terrain. It then reaches the Monroe–West Monroe area in Ouachita Parish, intersecting U.S. Highway 165 and crossing the Ouachita River. A brief auxiliary route, Interstate 220, provides a 17.6-mile northern semicircular bypass around Shreveport, connecting back to I-20 east of the Red River.[18] East of Monroe, I-20 shifts to flatter, agricultural landscapes, serving rural parishes including Richland, Morehouse, and East Carroll through towns like Rayville, Delhi, and Tallulah. The route remains north of the Mississippi River, approaching the Vicksburg vicinity without crossing into Mississippi territory, and terminates at the state line. This segment experiences heavy industrial and truck traffic near Shreveport due to the region's manufacturing and logistics hubs, while portions in flood-prone lowlands feature elevated sections to mitigate water risks from nearby rivers and bayous. The state's major rehabilitation project along I-20, addressing pavement and safety, is anticipated for completion in late 2025 or early 2026.[18][19][20][5]Mississippi
Interstate 20 enters Mississippi from Louisiana across the Vicksburg Bridge over the Mississippi River, immediately reaching an interchange with US 61 and US 80 in Vicksburg.[21] From there, the route proceeds eastward through rural areas and rolling hills of Warren and Hinds counties, passing Clinton before entering the Jackson metropolitan area.[21] Spanning a total of 154 miles within the state, I-20 serves as a vital east-west corridor connecting the Mississippi Delta region to central and eastern parts of the state.[21] In the Jackson area, I-20 briefly overlaps with I-55 for approximately 1.7 miles southeastward across the Pearl River, forming a concurrency known as the Stack interchange where the two highways split.[21] The route bypasses downtown Jackson to the south, with key junctions including I-220, which functions as the northern beltway for the metro area; US 49 near Richland; and the Natchez Trace Parkway west of Clinton.[21] East of Jackson, I-20 travels through the urban fringes of Pearl and Brandon before transitioning into rural pine forests and central Mississippi plains. Continuing eastward, I-20 passes through Scott, Newton, and Lauderdale counties, serving smaller communities like Forest, Newton, and Chunky amid agricultural and wooded terrain.[21] Near Meridian, I-20 joins I-59 adjacent to Meridian Regional Airport, beginning a concurrency that continues eastward approximately 24 miles to the Alabama state line in Lauderdale County.[21] Throughout its path, I-20 plays a critical role as an evacuation route for hurricanes impacting the Gulf Coast, facilitating northward and westward movement from coastal areas via connections like US 49 and I-55.Alabama
Interstate 20 enters Alabama from Mississippi near Cuba in Sumter County, running concurrently with Interstate 59 for approximately the western 130 miles of its 214.7-mile course through the state. The freeway proceeds eastward through rural western Alabama, reaching the Tuscaloosa metropolitan area where it interchanges with U.S. Route 82 near the University of Alabama. From there, the route trends north-northeast, passing through the Black Belt region before arriving at the Birmingham metropolitan area, Alabama's largest urban center and a historical hub for the iron and steel industry that generates substantial freight traffic along the corridor.[22][22][22][23] In the Birmingham area, I-20 briefly overlaps with the I-459 bypass to the south, skirting the city's southern suburbs through Irondale and Leeds while providing access to major radial routes including an interchange with I-65 at the notorious "Malfunction Junction" and a connection to U.S. Route 280 near Red Mountain. East of Birmingham, the highway separates from I-59 and continues independently through St. Clair County, passing Pell City and serving as a key link for local commerce before reaching the Calhoun County communities of Oxford and Anniston, where it supports military and manufacturing activities at Anniston Army Depot. The route then enters the Appalachian foothills, traversing Talladega National Forest and passing near Cheaha State Park, home to Alabama's highest natural point at 2,407 feet above sea level.[22][22][22][24] Further east, I-20 winds through the rural, hilly terrain of Cleburne County, reaching the highest elevation along the entire Interstate 20 system at 909 feet (Weems Gap) within the vicinity of Cheaha State Park before descending gradually toward the Georgia state line near Heflin. This eastern segment features scenic views of the southernmost extension of the Appalachian Mountains and limited development, contrasting with the industrial density of the Birmingham vicinity. The highway's path in Alabama thus transitions from flat coastal plain influences in the west to increasingly vertical and forested landscapes in the east, facilitating both regional travel and economic connectivity across north-central portions of the state.[22][25]Georgia
Interstate 20 enters Georgia from Alabama near Tallapoosa in Haralson County, marking the boundary between the Central and Eastern time zones as it heads east-northeast through rural western Georgia.[26] The highway initially passes through pine forests and small communities such as Bremen and Villa Rica before reaching the Atlanta metropolitan area, where it expands to six lanes to accommodate growing urban traffic.[9] In the Atlanta region, I-20 intersects Interstate 85 in downtown Atlanta at the Capitol Hill Interchange and connects with the I-285 perimeter highway northwest of the city center, facilitating access to surrounding suburbs like Douglasville and Smyrna.[26] As I-20 approaches central Atlanta from the west, it briefly bypasses the city's northern edge before curving southeast through the urban core and then east via Decatur, handling heavy commuter volumes with up to ten lanes in sections, including high-occupancy vehicle (HOV) lanes between exits 59 and 67.[26] Beyond the metro area, the route narrows to four lanes and traverses rolling piedmont terrain, passing through cities like Covington and Madison en route to the Augusta vicinity.[9] In the Augusta area, I-20 briefly cosigns with I-520, the local beltway, before continuing east through eastern Georgia's rural landscapes.[26] The Georgia segment of I-20 spans approximately 202 miles, the third-longest Interstate within the state, and plays a key role in regional freight movement by linking Atlanta's logistics hubs to eastern ports, including indirect access to Savannah via connecting highways.[26][27][28] Traffic congestion is particularly acute in the Atlanta corridor, where daily commuters contribute to frequent delays, especially during peak hours.[29] The highway exits Georgia eastward across the Savannah River near North Augusta, South Carolina, after passing through rural areas east of Augusta.[26]South Carolina
Interstate 20 enters South Carolina from Georgia across the Savannah River via a multi-bridge structure into North Augusta in Aiken County. The highway then trends northeast through rural areas of Aiken and Edgefield counties before reaching the Columbia metropolitan area in Lexington and Richland counties, where it forms a complex interchange with I-26 and I-126 west of downtown Columbia.[30] This junction serves as a critical hub for traffic distribution across the Midlands region. Bypassing Columbia to the north, I-20 intersects US 1 near Lexington and continues eastward to meet I-77 north of the city, providing connectivity to Charlotte, North Carolina.[31] The route then passes through the Sandhills physiographic region, traversing Kershaw and Sumter counties en route to the Florence area in the Pee Dee region, where it terminates at a trumpet interchange with I-95.[32] In South Carolina, I-20 spans approximately 142 miles, representing the state's primary east-west corridor and its longest Interstate segment. The Carolina Crossroads project, including I-20 widening between Exits 61 and 63, is underway to reduce congestion, with phases accelerated as of 2024.[33][34] Historically, the corridor follows paths through the Piedmont and Sandhills areas that were central to South Carolina's textile industry, which peaked in the mid-20th century as a cornerstone of the state's manufacturing economy before declining due to global competition and automation.[35] Today, I-20 facilitates commerce and tourism, offering a direct link for visitors from the west to Myrtle Beach destinations via the I-95 interchange and connecting routes like US 501.[36]History
Planning and designation
The planning for Interstate 20 originated with the Federal-Aid Highway Act of 1944, which authorized the designation of a 40,000-mile National System of Interstate Highways to connect major cities and facilitate national defense and commerce.[37] This act laid the groundwork for east-west corridors across the southern United States, including a route traversing Texas, Louisiana, Mississippi, Alabama, Georgia, and South Carolina. The specific alignment for what would become I-20 was further refined in the Bureau of Public Roads' 1955 "Yellow Book" plan, which proposed a continuous east-west highway in the southern tier, generally paralleling U.S. Route 80 and serving key population centers while avoiding overly circuitous paths.[38] This proposal emphasized efficient connectivity for economic development and military mobility, integrating state-submitted alignments approved by the Commissioner of Public Roads on September 15, 1955.[39] Initial route alignments sparked regional debates in the 1950s, particularly in Texas, where state officials and civic leaders advocated for a northern path through Dallas and Fort Worth to maximize urban access and economic benefits, rather than a more southern trajectory.[40] This push influenced the final configuration, incorporating the Dallas–Fort Worth Turnpike into the system and resolving rivalries between the two cities by splitting related routes like I-35. In the Southeast, states including Alabama and Georgia supported an alignment linking Birmingham and Atlanta to ensure seamless integration with emerging urban expressways, prioritizing industrial hubs and population density over alternative southern deviations. These discussions were part of broader Interstate System planning under the American Association of State Highway Officials (AASHO), balancing local interests with national standards. On August 14, 1957, AASHO approved the official numbering for Interstate routes, designating the southern east-west corridor as Interstate 20 and replacing earlier unnumbered proposals from the 1947 plan, such as Route No. 7, which had outlined a similar transcontinental path.[37] This numbering followed the established convention of even digits for east-west routes, with lower numbers assigned to more southerly paths, and was adapted from the U.S. Highway system to promote uniformity.[41] The designation formalized I-20's role within the broader Interstate System, authorized by the Federal-Aid Highway Act of 1956, enabling federal funding at 90% of construction costs while states covered the remainder. Early cost estimates for the entire Interstate System, including I-20, projected approximately $27 billion nationwide in 1955 dollars, reflecting rural and urban segments but without isolated figures for individual routes like I-20.[42]Construction
Construction of Interstate 20 commenced in the late 1950s after its designation as part of the national Interstate Highway System in 1957, with state-specific approvals following shortly thereafter. In Texas, the route was formally designated on October 1, 1959, by the Bureau of Public Roads, spanning from a junction with I-10 southwest of Pecos eastward to the Louisiana state line, paralleling U.S. Route 80. Initial construction proceeded from east to west, beginning with segments near the Louisiana border and progressing toward the west, including bypass loops around major cities like Dallas and Fort Worth. The Texas State Highway Commission approved the full 634-mile length in 1962, with the final route alignment, which bypassed Dallas-Fort Worth to the south, confirmed in 1971. By 1967, the highway was complete from the Louisiana state line to Weatherford, west of Fort Worth. The southern segment of the Dallas-Fort Worth loop, now part of I-20, reached completion in 1969, marking a significant milestone in connecting the metroplex area.[43][44][9] In the eastern states, construction advanced in parallel phases during the 1960s. In Louisiana, the first major segment of I-20, a 9.7-mile stretch between Ruston and Choudrant in the northern part of the state, opened to traffic on April 23, 1960, celebrated as one of the state's "highways of the future" with a ribbon-cutting ceremony attended by Governor Jimmie Davis. The Shreveport expressway portion, integral to I-20, was under construction by 1967, with key sections opening around 1968 to link the city and facilitate cross-river traffic. Bridge construction over the Red River near Shreveport, a critical engineering challenge due to the river's width and flood-prone nature, was completed in 1965 using a haunched deck plate girder design to support the four-lane freeway.[45][46][47] Mississippi's construction focused on connecting Vicksburg, Jackson, and Meridian, with early openings including a short portion from Newton to Kewanee by 1967. The segment from Meridian to Pearl opened in 1968, followed by the south side bypass around Jackson in 1970, alleviating urban congestion in the capital. The overlap with I-20/59 through Meridian was finished in the mid-1970s. River crossings, such as those over the Pearl River near Jackson, presented logistical hurdles similar to Louisiana's, requiring coordinated engineering to handle seasonal flooding and maintain alignment with adjacent states.[9] In Alabama, construction progressed through Birmingham, where the central business district segment of I-20/59 was substantially completed by 1971, though final adjustments extended into 1973. This urban routing involved significant disruption, including the demolition of neighborhoods and viaducts to integrate the freeway into the city's core. Georgia's I-20 construction spanned from August 1958 to November 1980, with the westernmost section from Villa Rica to the Alabama state line opening on December 20, 1977, completing the link to Atlanta. The Atlanta portion, routed in the 1960s, faced notable challenges from eminent domain proceedings, displacing communities and altering the urban landscape as part of broader city planning efforts documented in 1960 reports that positioned the freeway as a boundary between residential areas.[48][9][49] South Carolina's I-20 was built in stages starting in the early 1960s, with the first interstate segment in the state—though primarily I-26—opening near Columbia in 1960; I-20-specific work near the capital began shortly after. The route from the Georgia state line through Columbia to Florence reached substantial completion by 1976, with the final eastern links finalized in 1978. Rural sections in western South Carolina encountered land acquisition issues, echoing broader interstate challenges in securing right-of-way from private landowners.[50] Throughout the 1970s and into the 1980s, remaining gaps were filled, particularly in Texas, where rural links west of Abilene and around Pecos were finalized in the early 1990s, achieving full coast-to-coast connectivity by 1991. Challenges across regions included land acquisition disputes in rural Texas, where eminent domain battles delayed segments amid agricultural concerns, and complex bridging over waterways like the Red River and Pearl River, which demanded advanced structural designs to withstand environmental stresses. Urban areas like Atlanta and Birmingham experienced social disruptions from relocations, with thousands of families affected by eminent domain in the 1960s.[51][9][52]Modern expansions and projects
In Texas, the Texas Department of Transportation (TxDOT) launched the Keep 20-30 Moving program in 2023 to address growing traffic demands along I-20 in the Fort Worth District.[53] This initiative includes three major projects spanning approximately 30 miles, with efforts focused on adding lanes, reconstructing interchanges, and converting frontage roads to improve mobility from near Fort Worth eastward toward areas like Terrell.[54] Project 1, which began construction in August 2023, targets improvements between Markum Ranch Road and the I-20/I-820 interchange, including ramp widenings and bridge replacements, with completion anticipated in early 2026.[54] Subsequent phases aim to extend these enhancements through 2028, prioritizing safety and capacity in high-growth corridors without altering the route's alignment. Louisiana's ongoing I-20 Major Rehabilitation Project in the Shreveport-Bossier City area, initiated in 2023, involves a $128 million full reconstruction of travel lanes and ramps from Pines Road to beyond LA 3132, near the I-49 interchange.[55] Key components include extensive concrete panel repairs and ramp reconstructions, such as the westbound on-ramp from Benton Road (LA 3), which remains closed until November 2025 to allow for complete rebuilding of approaches and flyover bridges.[5] The project, managed by the Louisiana Department of Transportation and Development (La DOTD), reached its two-year milestone in September 2025 and is on track for substantial completion by early 2026, enhancing durability against regional weather challenges.[55] In Mississippi, the Mississippi Department of Transportation (MDOT) is advancing multiple I-20 improvements in Warren County to bolster interchange functionality and bridge integrity.[56] A $13.4 million reconstruction of the Flowers interchange, underway since early 2025, includes new ramp configurations, roundabouts, and detour paving to reduce bottlenecks, with completion expected in fall 2026.[57] Complementing this is a $17.1 million bridge repair initiative over the Big Black River, involving hydro-demolition, polymer wrapping, and deck reinforcements on six structures, also slated for fall 2026 completion to improve load capacity and flood resistance.[57] Alabama's developments along I-20 emphasize economic integration through access-driven projects, such as the 18-acre Strand at Lincoln mixed-use site in Talladega County.[58] Located at Exit 165 off Stemley Road near the Honda manufacturing plant, this initiative includes a hotel, two quick-service restaurants, a fuel and convenience center, and climate-controlled storage facilities accommodating watercraft and recreational vehicles, with construction starting in 2025 and completion in about nine months.[58] The project supports regional growth in the Birmingham-Atlanta corridor by leveraging highway proximity for commercial expansion. Georgia's Georgia Department of Transportation (GDOT) is executing the I-285/I-20 West Interchange project, a multiyear effort to alleviate severe congestion in the Atlanta metro area.[59] Ongoing work in Fulton and Cobb counties involves reconstructing ramps, eliminating left-hand merges, and adding lanes along I-20 from Factory Shoals Road to Hamilton E. Holmes Drive (about six miles total) and on I-285 from Donald Lee Hollowell Parkway to MLK Jr. Drive (two miles).[59] This includes collector-distributor lanes and bridge upgrades over the Chattahoochee River and rail lines, with phased expansions continuing into 2025 to enhance flow without route realignments.[59] In South Carolina, the South Carolina Department of Transportation (SCDOT) is managing the Carolina Crossroads project, a $2.27 billion initiative to reconfigure the I-20, I-26, and I-126 interchanges in Columbia, addressing congestion at one of the state's busiest junctions.[34] Construction on Phases 1 and 2 began in November 2021, with a re-phasing announced in February 2024 to accelerate delivery; as of November 2025, work includes bridge replacements and lane additions, with full completion expected by 2030 but substantial progress through 2026. Across I-20 states, modern projects since the 2000s have centered on metropolitan congestion relief through lane additions and interchange modernizations, while incorporating elements of hurricane resilience via reinforced structures in flood-prone areas like Louisiana and Texas.[12] Federal initiatives have also integrated electric vehicle (EV) charging stations along the corridor as part of the National Electric Vehicle Infrastructure program, with over 200,000 public ports nationwide by 2025 supporting I-20 travel, though no major route realignments have occurred since 2000.[60]Related routes
Auxiliary Interstates
Interstate 20 is served by four auxiliary routes designated with three-digit numbers, all functioning primarily as urban bypasses or beltways to alleviate congestion in major metropolitan areas along the mainline. These routes include I-820 in Texas, two separate I-220 designations in Louisiana and Mississippi, and I-520 in Georgia. No other three-digit auxiliary Interstates branch from or connect to I-20. I-820 in Texas forms a 35.6-mile (57.3 km) beltway encircling Fort Worth, providing relief for through traffic by diverting vehicles around the city's core.[61] It connects directly to I-20 on the southeast side, linking up with I-35W to the north and US 287 to the east, facilitating commuter and freight movement across the Dallas–Fort Worth metroplex.[62] Construction occurred in stages from the late 1960s through the 1980s, with the west loop finalized between 1969 and 1982 to address growing suburban development and interstate traffic demands.[63] I-220 in Louisiana spans 17.6 miles (28.3 km) as a northern bypass of Shreveport, reconnecting with I-20 on both its western and eastern ends while providing an alternate path for traffic avoiding the urban center.[64] The route intersects I-49 near the midpoint, enhancing connectivity to northern Louisiana and Arkansas for both local and regional travel.[64] Constructed in stages from 1971, with the full route completed in 1991, it was developed to support economic growth in the Shreveport–Bossier City area by improving access to industrial zones and reducing downtown congestion.[64] I-220 in Mississippi is a 12-mile (19 km) western loop around Jackson, branching from I-20 on the southwest side and terminating at I-55 to the north, offering a shorter path for west-side suburban and freight traffic.[65] This auxiliary route bypasses the city's northwestern quadrant, connecting key industrial areas and easing pressure on the mainline I-20 through the capital.[65] Opened to traffic in 1981, it was constructed as part of broader efforts to manage urban expansion and improve north-south linkages in central Mississippi.[65] I-520 covers 15.8 miles (25.4 km) through Augusta, Georgia, serving as an eastern beltway segment that briefly cosigns with I-20 before looping northeast to cross into South Carolina.[66] It connects I-20's eastern approach to local arterials like US 25 and provides a southern bypass for traffic heading toward the Savannah River region.[66] In South Carolina, the continuation is unsigned as SR 520 but maintains Interstate standards, linking to North Augusta. Built during the 1970s, the route was established to promote regional commerce and relieve pressure on Augusta's central corridors.[67]Business routes
Interstate 20 (I-20) features several business routes, also known as business loops or spurs, that provide access to local business districts and downtown areas along the mainline freeway. These routes typically follow former alignments of U.S. Route 80 or other pre-interstate paths, allowing through traffic to bypass urban cores while maintaining connectivity for commercial and residential areas. Most are short segments, ranging from 2 to 32 miles, and serve economic hubs by directing local traffic away from the high-speed mainline.[9] In Texas, I-20 has the highest concentration of business routes, with 15 loops concentrated in West Texas to support rural and small-city economies spaced along the corridor. These routes, maintained by the Texas Department of Transportation (TxDOT), generally parallel the original U.S. 80 path through town centers, facilitating access to services and reducing congestion on the interstate. Notable examples include the Pecos–Barstow business loop (approximately 20 miles), which connects Pecos and Barstow via former U.S. 80; the Odessa–Midland business loop (32 miles), serving the Permian Basin oil region by linking the two cities through commercial districts; and the Abilene business loop (10 miles), routing traffic through downtown Abilene along old alignments. Other loops, such as those in Monahans (7.2 miles) and Sweetwater, follow similar patterns, emphasizing local commerce in oil, agriculture, and trade.[68][69] Louisiana has limited designated business routes for I-20, with elements of inner loops in Shreveport incorporating business access. The Shreveport inner loop, part of the local roadway network, functions similarly to a business route by providing downtown connectivity, though it is not formally signed as Business I-20. Near the state line, the Vicksburg business route (approximately 3 miles) primarily serves the Mississippi side but supports cross-river access to local businesses via alignments tied to U.S. 61 and former U.S. 80. These segments prioritize urban mobility in the Shreveport–Bossier City metro area.[17] In Mississippi, two primary business loops aid navigation to city centers. The Jackson business loop (5 miles) follows the pre-interstate alignment through downtown Jackson, connecting to U.S. 51 and local streets for access to government, retail, and hospitality districts. The Meridian business loop (4 miles) similarly routes traffic through the city's core along former U.S. 80, supporting commerce near the I-20/I-59 junction and aiding regional trade. Both are maintained by the Mississippi Department of Transportation (MDOT) to enhance economic vitality without overloading the mainline.[70] Alabama's business routes for I-20 include the Birmingham loop (14 miles), which utilizes U.S. 78 and U.S. 11 through the central business district, providing essential links to industrial and commercial zones in Alabama's largest city. A shorter spur in Heflin offers local access to businesses near the Georgia line. These routes, overseen by the Alabama Department of Transportation (ALDOT), focus on integrating interstate travel with urban revitalization efforts.[71] In Georgia, business routes are integrated into urban networks, with a 6-mile loop in Augusta following local alignments to downtown, supporting tourism and retail along the Savannah River corridor. In the Atlanta area, inner loops via city streets serve as de facto business paths, directing traffic to the central business district without formal interstate signage. The Georgia Department of Transportation (GDOT) maintains these for seamless connectivity in high-growth metro regions.[72] South Carolina concludes the eastern business routes with the Florence business loop (4 miles), extending from I-20/I-95 to downtown via David H. McLeod Boulevard and tying into U.S. 76. This spur, managed by the South Carolina Department of Transportation (SCDOT), serves retail centers and the city core, promoting economic access in the Pee Dee region.[73] Overall, I-20's business routes total around 20, predominantly short (2-10 miles) except for longer Texas loops, and are preserved to bolster local economies by preserving historic alignments for non-interstate traffic. Texas accounts for the majority due to the corridor's rural expanse and historical development patterns.[74]Exit list
Texas
The following table lists the exits for Interstate 20 in Texas, from the western terminus at I-10 near Kent to the Arkansas state line near Texarkana. Mileposts are based on the Texas Department of Transportation reference markers.[44]| Exit | Mile | Locations | Destinations | Notes |
|---|---|---|---|---|
| - | 0.00 | Scroggins Draw | I-10 west – El Paso | Western terminus; I-10 exit 186 westbound |
| - | 0.00 | - | I-10 east | Eastbound entrance only; I-10 exit 187 |
| 3 | 2.7 | - | Stocks Road | - |
| 7 | 7.0 | - | Johnson Road | - |
| 13 | 12.8 | - | McAlpine Road | - |
| 22 | 21.9 | Toyah | FM 2903 – Toyah | - |
| 29 | 29.0 | - | Shaw Road | - |
| 33 | 33.4 | - | FM 869 | - |
| 37 | 37.6 | Pecos | I-20 BL east – Pecos | Cosigned with US 80 |
| 39 | 39.9 | Pecos | SH 17 – Fort Davis, Balmorhea | - |
| 40 | 40.5 | Pecos | Country Club Drive | - |
| 42 | 41.9 | Pecos | US 285 – Fort Stockton, Carlsbad | - |
| 44 | 43.8 | - | Collie Road | - |
| 49 | 49.3 | Barstow | FM 516 – Barstow | - |
| 52 | 52.7 | Barstow | I-20 BL west – Barstow | Westbound exit and eastbound entrance |
| 58 | 58.8 | - | Frontage Road | - |
| 66 | 65.7 | Pyote | SH 115 / FM 1927 – Pyote, Kermit | - |
| 70 | 69.8 | Pyote | Spur 65 | - |
| 73 | 73.3 | Wickett | FM 1219 – Wickett | - |
| 76 | 75.5 | Thorntonville | I-20 BL east – Monahans | - |
| 77 | 77.0 | Monahans | South Colorado Street | Eastbound exit only |
| 79 | 78.5 | Monahans | Loop 464 | Eastbound entrance via exit 80 |
| 80 | 79.5 | Monahans | SH 18 – Kermit, Fort Stockton | - |
| 82 | 81.3 | Monahans | East Monahans Parkway | Westbound exit only |
| 83 | 83.2 | Monahans | I-20 BL west – Monahans | - |
| 86 | 85.2 | - | PR 41 – Monahans Sandhills State Park | - |
| 93 | 92.5 | - | FM 1053 – Fort Stockton | - |
| 101 | 100.7 | Penwell | FM 1601 – Penwell | - |
| 104 | 104.3 | Goldsmith | FM 866 – Goldsmith | - |
| 108 | 108.1 | Odessa | Moss Avenue – Meteor Crater | - |
| 112 | 111.9 | Odessa | I-20 BL east / FM 1936 – Odessa | - |
| 113 | 113.3 | Odessa | SH 302 / Loop 338 – Kermit | - |
| 115 | 114.7 | Odessa | FM 1882 (County Road West) | - |
| 116 | 116.5 | Odessa | US 385 – Andrews, Crane | Access to hospitals |
| 118 | 117.2 | Odessa | FM 3503 / Grandview Avenue | - |
| 120 | 119.3 | Odessa | JBS Parkway | - |
| 121 | 120.6 | Odessa | Loop 338 – Odessa | - |
| 126 | 126.5 | Midland | FM 1788 / SH 349 north – UT Permian Basin | Western end of SH 349 overlap |
| 131 | 131.5 | Midland | SH 158 west / Loop 250 – Midland | Western end of SH 158 overlap |
| 134 | 133.9 | Midland | Midkiff Road | - |
| 135 | 134.8 | Midland | Cotton Flat Road | - |
| 136 | 135.9 | Midland | Bus. SH 349 / SH 349 south – Rankin, Lamesa | Eastern end of SH 349 overlap |
| 137 | 136.8 | Midland | Old Lamesa Road | Signed as 137A eastbound |
| 138 | 137.9 | Midland | SH 158 east / FM 715 – Garden City, San Angelo | Eastern end of SH 158 overlap; signed as 137B eastbound |
| 140 | 139.5 | Greenwood | FM 307 – Greenwood | Eastbound exit and westbound entrance |
| 143 | 142.2 | Midland | Loop 250 | - |
| 144 | 144.4 | Midland | I-20 BL west / Loop 250 – Midland | No westbound entrance |
| 151 | 151.7 | - | FM 829 | Westbound exit and entrance |
| 154 | 153.7 | Stanton | I-20 BL east – Stanton | - |
| 156 | 155.9 | Stanton | SH 137 – Lamesa | Access to Martin County Hospital |
| 158 | 158.4 | Stanton | I-20 BL west – Stanton | - |
| 165 | 165.1 | - | FM 818 | - |
| 169 | 169.4 | - | FM 2599 | - |
| 171 | 170.9 | - | Moore Field Road | - |
| 172 | 172.1 | - | Cauble Road | Westbound exit signed at exit 173 |
| 173 | 172.7 | Big Spring | US 87 – Lamesa, San Angelo | Relief route for US 87 |
| 174 | 174.0 | Big Spring | I-20 BL east – Big Spring | - |
| 176 | 176.1 | Big Spring | SH 176 – Andrews | - |
| 177 | 177.0 | Big Spring | Bus. US 87 (Lamesa Highway) – San Angelo, Lamesa | Former US 87 alignment |
| 178 | 177.9 | Big Spring | SH 350 – Snyder | - |
| 179 | 179.8 | Big Spring | I-20 BL west – Big Spring | - |
| 181A | 180.5 | - | FM 700 | - |
| 181B | 181.3 | - | Refinery Road | - |
| 182 | 182.4 | - | Midway Road | - |
| 184 | 184.3 | - | Moss Lake Road – Sand Springs | - |
| 186 | 186.3 | - | Salem Road – Sand Springs | - |
| ... | ... | ... | ... | (Table truncated for brevity; full list continues through counties like Dawson, Borden, Scurry, Fisher, Jones, Taylor, Callahan, Eastland, Parker, Tarrant, Johnson, Ellis, Kaufman, Rockwall, Hunt, and Harrison, with key exits such as 283 Abilene, 325 Cisco, 349 Weatherford, 421 Arlington, 443 Fort Worth I-820, 467 Fort Worth I-30, 503 Terrell, 569 Longview, 632 Texarkana I-30. HOV lanes present in Dallas-Fort Worth area from exits 421 to 467. Cosigned with US 80 from exit 37 to exit 632.) |
Louisiana
The following table lists the exits for Interstate 20 in Louisiana, from the Texas state line to the Mississippi state line. Data compiled from highway records.[75]| Exit | Mile | Locations | Destinations | Notes |
|---|---|---|---|---|
| - | 0 | Texas state line | I-20 west – Dallas | Western terminus in Louisiana |
| - | 1 | - | Weigh Station | Both directions |
| - | 2 | - | Louisiana Welcome Center | Eastbound |
| 3 | 3 | Mooringsport | US 79 south / LA 169 – Carthage TX | - |
| 5 | 5 | Greenwood | US 79 north / US 80 – Greenwood | - |
| 8 | 8 | Waskom | US 80 / LA 526 east – Industrial Loop | - |
| 10 | 10 | Shreveport | Pines Road | - |
| 11 | 11 | Shreveport | LA 3132 east – I-49 south | Cloverleaf interchange |
| 13 | 13 | Shreveport | Monkhouse Drive – Airport | Shreveport Regional Airport |
| 14 | 14 | Shreveport | Jewella Avenue | - |
| 16A | 16 | Shreveport | US 171 – Hearne Avenue, County Fairgrounds | - |
| 16B | 16 | Shreveport | US 79 / US 80 – Greenwood Road | - |
| 17A | 17 | Shreveport | Linwood Avenue / Lakeshore Drive – Cross Lake | - |
| 17B | 17 | Shreveport | I-49 south – Alexandria | - |
| 18A | 18 | Shreveport | Common Street / Line Avenue | - |
| 18C | 18 | Shreveport | Fairfield Avenue | - |
| 18D | 18 | Shreveport | Common Street / Louisiana Avenue | - |
| 19A | 19 | Shreveport | US 71 north / Spring Street | - |
| 19B | 19 | Shreveport | Traffic Street | - |
| 20A | 20 | Bossier City | Isle of Capri Boulevard / Hamilton Road | - |
| 20B | 20 | Bossier City | LA 3 – Benton Road | - |
| 20C | 20 | Bossier City | US 71 south – Barksdale Boulevard | - |
| 21 | 21 | Bossier City | LA 72 – Old Minden Road | To US 71 south |
| 22 | 22 | Bossier City | Airline Drive – Barksdale AFB | - |
| 23 | 23 | Bossier City | Industrial Drive | - |
| 26 | 26 | Haughton | Louisiana Downs Racetrack | - |
| 33 | 33 | Haughton | LA 157 – Haughton, Fillmore | - |
| 38 | 38 | Doyline | Goodwill Road – Ammunition Plant | - |
| 44 | 44 | Minden | US 371 north / LA 7 – Cotton Valley, Springhill | - |
| 47 | 47 | Minden | US 371 south / LA 159 – Minden, Sibley | Access to Lake Bistineau State Park |
| 49 | 49 | Dubberly | LA 531 – Dubberly, Minden | - |
| 52 | 52 | Dubberly | LA 532 – Dubberly | To US 80 |
| 55 | 55 | Ada | US 80 – Ada, Taylor | - |
| 61 | 61 | Gibsland | LA 154 – Gibsland, Athens | Access to Lake Claiborne State Park |
| 67 | 67 | Arcadia | LA 9 – Arcadia, Homer | Access to Lake Claiborne State Park |
| 69 | 69 | Arcadia | LA 151 – Arcadia, Dubach | - |
| 77 | 77 | Simsboro | LA 507 – Simsboro | - |
| 78 | 78 | - | LA 563 – Industry | - |
| 81 | 81 | Grambling | LA 149 – Grambling State University | - |
| 84 | 84 | Ruston | LA 544 – Ruston | - |
| 85 | 85 | Ruston | US 167 – Ruston, Dubach | - |
| 86 | 86 | Ruston | LA 33 – Ruston, Farmerville | - |
| 93 | 93 | Choudrant | LA 145 – Choudrant, Sibley | - |
| 101 | 101 | Calhoun | LA 151 – Calhoun, Downsville | - |
| 103 | 103 | Calhoun | US 80 – Calhoun | - |
| 107 | 107 | - | Camp Road / Ouachita Parish Road 25 | - |
| 108 | 108 | Cheniere | LA 546 – Cheniere | To US 80 |
| 112 | 112 | - | Well Road | - |
| 114 | 114 | Monroe | LA 617 – Thomas Road | - |
| 115 | 115 | Monroe | LA 34 – Stella Street / Mill Street | - |
| 116A | 116 | Monroe | Fifth Street | - |
| 116B | 116 | Monroe | Bus. US 165 / LA 15 – Civic Center, Jackson Street | - |
| 117A | 117 | Monroe | Hall Street | - |
| 117B | 117 | Monroe | LA 594 – Texas Avenue | - |
| 117C | 117 | Monroe | Bus. US 165 / LA 15 – Civic Center | - |
| 118A-B | 118 | Bastrop | US 165 – Bastrop, Columbia | - |
| 120 | 120 | Monroe | Garrett Road – Monroe Airport | Monroe Regional Airport |
| 124 | 124 | Millhaven | LA 594 – Millhaven | Richland Sage Wildlife Area |
| 132 | 132 | Columbia | LA 133 – Columbia, Start | - |
| 138 | 138 | Rayville | LA 137 – Archibald, Rayville | - |
| 141 | 141 | - | LA 583 – Bee Bayou Road | - |
| 145 | 145 | Holly Ridge | LA 183 / Richland Parish Road 202 – Holly Ridge | - |
| 148 | 148 | Dunn | LA 609 – Dunn | - |
| 153 | 153 | Winnsboro | LA 17 – Winnsboro, Delhi | - |
| 157 | 157 | Waverly | LA 577 – Waverly | - |
| 171 | 171 | Tallulah | US 65 – Vidalia, Tallulah, Newellton | - |
| - | 189.84 | Mississippi state line | I-20 east – Vicksburg MS | Eastern terminus in Louisiana |
Mississippi
The following table lists the exits for Interstate 20 in Mississippi, from the Louisiana state line at Vicksburg to the Alabama state line near Meridian. Mileposts are approximate. Cosigned with I-59 from Meridian (after exit 121) to the state line.[76][77]| Exit | Mile | Locations | Destinations | Notes |
|---|---|---|---|---|
| 1A | 0 | Vicksburg | Washington Street / Warrenton Road (US 61 Bus.) | - |
| 1B | 0.5 | Vicksburg | US 61 south / US 65 south – Port Gibson, Natchez | - |
| 2B | 1.5 | Vicksburg | Spring Street / Clay Street | - |
| 4A | 3 | Vicksburg | I-20 BL / US 61 north / US 65 north / US 80 – Downtown Vicksburg | - |
| 4B | 3.5 | Vicksburg | US 61 Bus. north – Downtown Vicksburg | - |
| 5A | 4.5 | Vicksburg | I-20 BL / US 80 – Downtown Vicksburg | - |
| 5B | 5 | Vicksburg | Washington Street | - |
| 6 | 6 | Vicksburg | Halls Ferry Road | - |
| 11 | 11 | Bovina | Bovina Road | - |
| 15A | 15 | Edwards | US 80 east – Edwards | - |
| 15B | 15 | Edwards | US 80 west – Vicksburg | - |
| 19 | 19 | Clinton | Springhill Road / Old Jackson Road | - |
| 22 | 22 | Clinton | Madison Street | - |
| 27 | 27 | Clinton | US 80 – Clinton | Cosigned with I-20 |
| 33 | 33 | Jackson | I-220 east – I-55 north | - |
| 36 | 36 | Jackson | I-55 south / US 51 – Jackson, McComb | - |
| 40 | 40 | Jackson | US 80 / US 49 – Jackson | - |
| 43 | 43 | Jackson | I-220 west – I-55 north | - |
| 47 | 47 | Jackson | US 49 north – Yazoo City | - |
| 52 | 52 | Jackson | Terry Road | - |
| 56 | 56 | Pearl | I-55 north – Grenada | - |
| 60 | 60 | Pearl | MS 468 – Pearl | - |
| 64 | 64 | Pearl | MS 18 – Pearl | - |
| 68 | 68 | Brandon | MS 13 – Brandon | - |
| 72 | 72 | Morton | MS 13 – Morton | - |
| 77 | 77 | Forest | MS 21 – Forest | - |
| 81 | 81 | Lake | MS 489 – Lake | - |
| 85 | 85 | Newton | MS 15 – Newton | - |
| 88 | 88 | Newton | Decatur Street | - |
| 91 | 91 | Chunky | Chunky Road | - |
| 96 | 96 | Hickory | MS 19 – Hickory | - |
| 112 | 112 | Meridian | 22nd Avenue | - |
| 113 | 113 | Meridian | I-20 BL / US 11 – Downtown Meridian | Concurrency with I-59 begins east of here |
| 115 | 115 | Meridian | 16th Street | - |
| 118 | 118 | Meridian | St. Paul Street | - |
| 120 | 120 | Meridian | 8th Street | - |
| 121 | 121 | Meridian | Frontage Road | - |
| ... | ... | ... | ... | (Full list includes additional exits such as 124 Toomsuba US 11, 129 Meehan US 80, 136 Philadelphia MS 15, 149 Scooba US 45, 165 Toomsuba, 169 Kewanee US 11/US 80. Key example: Exit 43 in Jackson for I-220 loop. No end of I-20 concurrency in MS.) |
Alabama
The following table lists the exits for Interstate 20 in Alabama, from the Mississippi state line to the Georgia state line. Cosigned with I-59 from state line to exit 130 (Birmingham). Mileposts from ALDOT.[78][79]| Exit | Mile | Locations | Destinations | Notes |
|---|---|---|---|---|
| 1 | 0 | Cuba | To US 80 east (SR 8) – Cuba, Demopolis | - |
| 3 | 2 | - | SR 14 – Livingston | - |
| 17 | 17 | Livingston | SR 28 – Livingston, Boyd | - |
| 26 | 26 | Eutaw | US 11 / SR 7 – Eutaw | - |
| 40 | 40 | Tuscaloosa | I-359 north / US 11 north – Tuscaloosa | - |
| 52 | 52 | Tuscaloosa | US 82 / SR 6 – Northport, Tuscaloosa | - |
| 62 | 62 | Cottondale | US 11 / SR 7 – Cottondale | - |
| 71B | 71 | Tuscaloosa | I-359 north / US 11 north / SR 69 north – Tuscaloosa | - |
| 71A | 71 | Tuscaloosa | I-359 south / SR 69 south – Moundville | - |
| 75 | 75 | Holt | Skyland Boulevard | - |
| 79 | 79 | Coaling | US 11 / SR 7 – Coaling, Cottondale | - |
| 89 | 89 | McCalla | SR 119 – Montevallo, Bessemer | - |
| 100 | 100 | Bessemer | SR 150 – Bessemer | - |
| 108 | 108 | Fairfield | Gary Avenue | - |
| 120 | 120 | Birmingham | 20th Street / Ensley Avenue | Access to Alabama State Fair Complex |
| 121 | 121 | Birmingham | Bush Boulevard / Ensley | - |
| 123 | 123 | Birmingham | US 78 / SR 4 (Arkadelphia Road) / SR 79 | - |
| 124A | 124 | Birmingham | 41st Street North / 32nd Avenue North | - |
| 124B | 124 | Birmingham | 25th Street North / 19th Avenue North | - |
| 125 | 125 | Birmingham | 15th Street North | - |
| 126A | 126 | Birmingham | 6th Avenue South | - |
| 126B | 126 | Birmingham | 8th Avenue South / 13th Street South | - |
| 128 | 128 | Birmingham | US 78 / SR 4 / SR 3 – 25th Street South / 1st Avenue South | - |
| 130 | 130 | Birmingham | US 31 / SR 3 – 19th Street North | End of I-59 concurrency; I-59 north to Gadsden |
| 132 | 132 | Irondale | Gadsden Mall / Roebuck Plaza | - |
| 136 | 136 | Irondale | I-459 south – Montgomery | - |
| 140 | 140 | Leeds | US 78 / SR 4 – Leeds | - |
| 144 | 144 | Moody | US 411 / SR 25 – Moody, Odenville | - |
| 147 | 147 | Cook Springs | SR 174 – Cook Springs | - |
| 152 | 152 | Pell City | SR 93 – Chula Vista | - |
| 153 | 153 | Eden | SR 411 – Eden, Odenville | - |
| 156 | 156 | Pell City | US 78 / SR 4 – Pell City | - |
| 158 | 158 | Pell City | SR 93 – Ashville, Ragland | - |
| 162 | 162 | Riverside | US 78 / SR 4 – Riverside, Pell City | - |
| 165 | 165 | Lincoln | SR 77 – Lincoln | - |
| 168 | 168 | Lincoln | I-20 BL / US 78 / SR 4 – Talladega, Lincoln | - |
| 173 | 173 | Eastaboga | SR 204 – Eastaboga | - |
| 179 | 179 | Oxford | Quintard Avenue | - |
| 185 | 185 | Anniston | US 431 / SR 21 – Oxford, Anniston | - |
| 188 | 188 | Oxford | McClellan Boulevard | To US 78 |
| 191 | 191 | - | SR 9 – Cheaha State Park | - |
| 199 | 199 | Heflin | US 78 / SR 4 – Heflin | - |
| 205 | 205 | Ranburne | SR 46 – Ranburne | - |
| 210 | 210 | - | SR 5 – Abernathy Road | - |
| 212 | 212 | Alabama-Georgia state line | I-20 east – Atlanta GA | Eastern terminus in Alabama |
Eastern section (Georgia to South Carolina)
The eastern section of Interstate 20 traverses 427.6 miles from the Alabama–Georgia state line near Tallapoosa, Georgia, to its eastern terminus at Interstate 95 near Florence, South Carolina. This segment passes through major urban areas including Atlanta and Augusta in Georgia, and Columbia in South Carolina, with numerous interchanges connecting to other interstates and U.S. routes. The route features no toll facilities throughout Georgia and South Carolina. Truck restrictions, such as lane limitations or prohibitions on certain local roads, apply in dense urban zones like Atlanta and Columbia to manage congestion and enhance safety.[81]Georgia Exits
The Georgia portion covers 214.6 miles with exits numbered 1 to 205 from west to east. Below is a table of key exits, highlighting major interchanges and destinations.| Exit | Milepost | Locations | Destinations | Notes |
|---|---|---|---|---|
| 5 | 4.7 | Tallapoosa | SR 100 – Bowdon, Carrollton | First full interchange after state line.[82] |
| 24 | 23.8 | Villa Rica | SR 61/SR 101 – Dallas | Access to western Atlanta suburbs.[82] |
| 44 | 44.0 | Douglasville | SR 6 (Thornton Road) – Austell, Powder Springs | Serves Cobb County industrial areas.[82] |
| 46 | 46.6 | Austell | Riverside Parkway – Six Flags Over Georgia | Major amusement park access.[82] |
| 51 | 50.6 | Atlanta | I-285 – Airport, Chattanooga | Western Atlanta Bypass interchange.[82] |
| 57 | 57.0 | Atlanta | I-75/I-85 (Downtown Connector) – Macon, Greenville | Central Atlanta core access.[82] |
| 67 | 66.9 | Decatur | I-285 – Airport, Macon | Eastern Atlanta Bypass interchange.[82] |
| 82 | 81.9 | Conyers | SR 20/SR 138 – Monroe, Athens | Rockdale County hub.[82] |
| 90 | 90.2 | Covington | US 278/SR 12 – Oxford | Newton County access.[82] |
| 114 | 114.3 | Madison | US 129/US 441/SR 24 – Eatonton, Athens | Morgan County route.[82] |
| 148 | 147.5 | Crawfordville | SR 22 – Sparta, Washington | Taliaferro County interchange.[82] |
| 172 | 171.8 | Thomson | SR 17 – Washington, Lincolnton | McDuffie County access.[82] |
| 199 | 199.0 | Augusta | I-520 (Bobby Jones Expressway) – Savannah | Eastern Georgia auxiliary route.[82] |
| 200 | 200.0 | Augusta | US 25 – Belair Road | Richmond County urban access.[82] |
| 205 | 214.6 | North Augusta | South Carolina state line | End of Georgia mileage.[82] |
South Carolina Exits
The South Carolina portion spans 213.0 miles with exits numbered 1 to 141 from west to east. The table below lists key exits, focusing on principal connections.| Exit | Milepost | Locations | Destinations | Notes |
|---|---|---|---|---|
| 1 | 0.5 | North Augusta | SC 230 – Aiken | Welcome center nearby; first interchange.[83] |
| 5 | 4.0 | North Augusta | US 25 – Greenwood | Access to Augusta area.[83] |
| 18 | 17.5 | Aiken | SC 19 – Aiken | Serves Aiken County seat.[83] |
| 22 | 21.5 | Aiken | SC 4 – North Augusta | Local Aiken access.[83] |
| 29 | 28.0 | Belvedere | SC 118 – Beech Island | Edgefield County route.[83] |
| 39 | 38.5 | Lexington | US 1 – Batesburg-Leesville | Lexington County interchange.[83] |
| 51 | 50.5 | Gilbert | US 378 – Orangeburg | Rural access east of Columbia.[83] |
| 61 | 61.0 | West Columbia | I-26 – Spartanburg, Charleston | Major junction west of Columbia.[83] |
| 65 | 65.0 | Columbia | I-126/US 21 – Downtown Columbia | Direct city center access.[83] |
| 71 | 71.0 | Columbia | US 176 – St. Andrews | Serves Irmo and Columbia suburbs.[83] |
| 80 | 80.0 | Columbia | I-77 – Charlotte, Charleston | Northeastern Columbia bypass.[83] |
| 87 | 87.0 | Lugoff | US 601 – Camden | Kershaw County route.[83] |
| 92 | 92.0 | Camden | US 521 – Sumter | Access to historic Camden.[83] |
| 98 | 98.0 | Lugoff | SC 34 – Bishopville | Local eastern access.[83] |
| 137 | 137.0 | Florence | SC 151 – Darlington | Final major local exit.[83] |
| 141 | 213.0 | Florence | I-95 – Fayetteville, Savannah | Eastern terminus of I-20.[83] |