Interstate 20 in South Carolina
J. Strom Thurmond Freeway | ||||
Route information | ||||
Maintained by SCDOT | ||||
Length | 141.51 mi[1][2] (227.74 km) | |||
Existed | 1964–present | |||
NHS | Entire route | |||
Major junctions | ||||
West end | I-20 at Georgia state line | |||
East end | I-20 BS in Florence | |||
Location | ||||
Country | United States | |||
State | South Carolina | |||
Counties | Aiken, Lexington, Richland, Kershaw, Lee, Darlington, Florence | |||
Highway system | ||||
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Interstate 20 (I-20) is the main east–west
The Interstate parallels US 1 closely from the state line to Camden where US 1 diverts away from the route and head northeast towards North Carolina while I-20 turns and heads eastward towards Florence.
Route description
I-20 enters the Palmetto State after crossing the
At Columbia, I-20 crosses the Saluda and Broad rivers and travels through the northern part of the city and turns eastward, bypassing Fort Jackson and Camden before reaching Florence. It is at Florence where I-20 sees its eastern terminus at I-95. However, for about two miles (3.2 km), the roadway continues to downtown Florence as I-20 Bus.
Services
The
The
History
I-20 first appeared between 1964 and 1967; its first section was completed from
Also in the same year, exit numbers were installed.In the late 1980s, I-20 was widened to six lanes between
Proposed extensions
The first proposal to extend I-20 was at the time of its designation in the state, and consisted of plans to extend it east from Florence to
In 2003, North Carolina Governor
If built, I-20 will have a concurrency with I-95 about 12 miles (19 km) through Florence, meet I-73 near Marion, have concurrency with a I-74 about 20 miles (32 km) from Whiteville to east of its future interchange with North Carolina Highway 211 (NC 211), and have future interchanges with I-140/US 17/US 74 east/US 421/NC 133 in Wilmington where I-20 will terminate at bridge crossing over the Cape Fear River where US 17/US 76/US 421/NC 133 crosses into downtown. However, it will not have a direct interchange with I-40 in Wilmington for this extension. While this extension has considerable support among towns in southeastern North Carolina, the South Carolina Department of Transportation has stated that they have no interest in upgrading their portion of US 76 to an Interstate. Instead, South Carolina is focusing on plans to build I-73 that will terminate near Myrtle Beach.[10]
While the extension had support in North Carolina, with justification that a direct route from
Future
I-26/I-126 interchange
SCDOT, in cooperation with the FHWA, is proposing improvements to a corridor along I-20, I-26, and I-126, including the system interchanges at I-20/I-26 and I-26/I-126 in Lexington and Richland counties. These improvements are proposed to increase mobility and enhance traffic operations by reducing existing traffic congestion within the corridor, while accommodating future traffic needs. The corridor's approximately 14 miles (23 km) of mainline Interstate include I-26 from exit 101 (Broad River Road, US 176) to east of the Saluda River, I-20 from the west of the Saluda River to west of the Broad River, and I-126 from I-26 to east of the interchange with Colonial Life Boulevard.[12]
Widening projects
This project represents the first bistate agreement between the Georgia Department of Transportation and SCDOT for a design–build project. This design–build project is for the widening of I-20 with an additional lane in each direction. The widening begins just west of Georgia State Route 104 (SR 104) interchange (I-20 GA exit 200) and it will terminate at SC 230 interchange (I-20 SC exit 1). The project will widen 1.8 miles (2.9 km) of I-20, replace four bridges over the Augusta Canal and Savannah River, and make intersection improvements at the West Martintown Road interchange in South Carolina. This project will cost $72 million and is scheduled to be completed in 2022.[13]
Another design–build project is for the widening of I-20 with an additional lane in each direction. The widening will begin just east of US 378 where the roadway transitions from a six lane section to a four lane section and terminate west of the Longs Pond Road interchange near milemarker 49 in Lexington County. The I-20 eastbound and westbound bridges over Norfolk Southern Railroad will be replaced. The pavement for the project will consist of both concrete and asphalt and the existing concrete pavement section will require reconstruction. The widening has since been completed as of June 2022.[14]
Exit list
County | Location | mi[2] | km | Exit | Destinations | Notes |
---|---|---|---|---|---|---|
Atlanta | Continuation into Georgia | |||||
1.2 | 1.9 | 1 | SC 230 – North Augusta | |||
4.9 | 7.9 | 5 | US 25 / SC 121 – Edgefield, Johnston | |||
5.6 | 9.0 | 6 | I-520 west (Palmetto Parkway) – North Augusta, Augusta | Eastern terminus of I-520 and Palmetto Parkway | ||
| 11.1 | 17.9 | 11 | Bettis Academy Road – Graniteville | ||
Aiken | 17.7 | 28.5 | 18 | SC 19 – Aiken, Johnston, Edgefield | ||
21.9 | 35.2 | 22 | US 1 – Aiken, Ridge Spring | |||
| 29.3 | 47.2 | 29 | Wire Road | ||
| 32.4 | 52.1 | 33 | SC 39 – Wagener, Monetta, Ridge Spring | ||
Lexington | | 38.7 | 62.3 | 39 | US 178 – Pelion, Batesburg-Leesville | |
| 44.1 | 71.0 | 44 | Road 34 – Gilbert | ||
| 50.8 | 81.8 | 51 | Longs Pond Road | ||
Lexington | 54.8 | 88.2 | 55 | SC 6 – Swansea, Pelion, Lexington | Signed as exits 55A (east) and 55B (west) westbound | |
57.5 | 92.5 | 58 | US 1 – Lexington, West Columbia | To Columbia Airport | ||
61.1 | 98.3 | 61 | US 378 – West Columbia, Lexington | |||
Richland | Columbia | 63.2 | 101.7 | 63 | Bush River Road | |
64.0 | 103.0 | 64 | I-26 (US 76 / James F. Byrnes Memorial Freeway) – Spartanburg, Columbia, Charleston | Signed as exits 64A (east) and 64B (west); I-26/US 76 exit 107 | ||
65.0 | 104.6 | 65 | US 176 (Broad River Road) | |||
68.2 | 109.8 | 68 | SC 215 (Monticello Road) – Jenkinsville | |||
69.6 | 112.0 | 70 | US 321 (Fairfield Road) – Winnsboro | |||
71.0 | 114.3 | 71 | US 21 (North Main Street) | |||
72.1 | 116.0 | 72 | SC 555 (Farrow Road) | |||
72.7 | 117.0 | 73 | SC 277 to I-77 north – Columbia, Charlotte | I-20 westbound has no access to SC 277 northbound; SC 277 southbound has no access to I-20 eastbound; signed as exits 73A (south) and 73B (north) | ||
73.9 | 118.9 | 74 | US 1 (Two Notch Road) | |||
75.5 | 121.5 | 76 | I-77 / Alpine Road – Charleston, Charlotte | Signed as exits 76A (I-77) and exit 76B (Alpine Road) westbound; I-77 exit 16; I-20 eastbound has no direct access to I-77 northbound; eastbound exit Alpine Road to I-77 north | ||
| 79.8 | 128.4 | 80 | Clemson Road | ||
| 81.5 | 131.2 | 82 | Spears Creek Church Road – Pontiac | ||
Kershaw | | 86.7 | 139.5 | 87 | White Pond Road – Elgin | |
Lugoff | 91.5 | 147.3 | 92 | US 601 (SC 12 west) – Lugoff, Camden, St. Matthews | Eastern terminus of SC 12 | |
Camden | 97.5 | 156.9 | 98 | US 521 – Camden, Sumter, Rembert | To Camden Military Academy | |
| 101.2 | 162.9 | 101 | Road 329 | ||
Lee | | 107.5 | 173.0 | 108 | Jamestown Road – Manville | |
Bishopville | 115.8 | 186.4 | 116 | US 15 – Sumter, Bishopville | ||
119.7 | 192.6 | 120 | SC 341 – Bishopville, Lynchburg, Elliott | |||
| 122.4 | 197.0 | 123 | Road 22 – Lamar | To Lee State Park | |
Darlington | | 130.6 | 210.2 | 131 | US 401 to SC 403 – Timmonsville, Darlington, Hartsville, Sumter | |
| 137.0 | 220.5 | 137 | SC 340 – Darlington, Timmonsville | ||
I-20 BS east – Florence | Eastern terminus of I-20; signed as exits 141A (north) and 141B (south); I-95 exit 160; to Myrtle Beach via I-95 north; roadway continues as I-20 BS eastbound | |||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
Related routes
I-20 has one
Interstate 20 Business
David H. McLeod Boulevard | |
Location | Florence, South Carolina |
Length | 2.244 mi[15] (3.611 km) |
Existed | 1970–present |
Interstate 20 Business (I-20 Bus) is a 2.244-mile (3.611 km) four-lane
The entire route is in Florence, Florence County.
mi[15] | km | Destinations | Notes | ||
---|---|---|---|---|---|
0.000 | 0.000 | I-20 west – Columbia I-95 – Fayetteville, Savannah | Interchange; western terminus of I-20 Bus.; signed as exits 141A (north) and 141B (south) using I-20 exit numbering; I-95 exit 160; roadway continues as I-20 westbound | ||
2.110 | 3.396 | West Evans Street to US 76 Conn. | |||
2.244 | 3.611 | US 76 (West Palmetto Street) – Timmonsville, Florence, Myrtle Beach | Official eastern terminus; SCDOT marks this intersection as the eastern terminus of unsigned US 76 Conn.; to Francis Marion University | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
See also
References
- ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2021". Route Log and Finder List. Federal Highway Administration. Retrieved May 9, 2022.
- ^ a b Google (June 5, 2014). "Interstate 20 in South Carolina" (Map). Google Maps. Google. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1963). General Highway Map, Richland County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1967). General Highway Map, Richland County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1967). General Highway Map, Aiken County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1970). General Highway Map, Richland County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1973). General Highway Map, Aiken County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ South Carolina State Highway Department (1976). General Highway Map, Florence County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina State Highway Department. Retrieved June 5, 2014.
- ^ Grainger, Kyle (February 19, 2009). "Why Interstate 73 and not I-20 to Myrtle Beach?". Myrtle Beach, South Carolina: WMBF-TV. Retrieved June 5, 2014.
- ^ "Strategic Highway Corridors Vision Plan, Southeastern NC" (PDF). Strategic Highway Corridors. NCDOT. September 2, 2004. Archived (PDF) from the original on October 9, 2022. Retrieved July 7, 2009.
- ^ "My Reporter Column Question on I-20 Going to Wilmington". StarNewsOnline.com. Retrieved October 4, 2014.
- ^ "Construction Phasing". Archived from the original on March 10, 2021. Retrieved March 4, 2021.
- ^ "I-20 @ Savannah River Bridge Replacements". Georgia Department of Transportation. Archived from the original on February 5, 2021. Retrieved March 5, 2021.
- ^ "I-20 Widening (Mile Markers 49–60)". South Carolina Department of Transportation.
- ^ a b "Highway Logmile Report". South Carolina Department of Transportation. Retrieved December 14, 2020.
- ^ Google (December 14, 2020). "Overview Map of I-20 Bus. (Florence, South Carolina)" (Map). Google Maps. Google. Retrieved December 14, 2020.
- ^ South Carolina Department of Transportation (July 2020). Florence Urban Area (PDF) (Map). 1:28,160. Columbia: South Carolina Department of Transportation. Sheet 4. §§ D5–D6. Retrieved December 14, 2020.
- ^ South Carolina Department of Transportation (1970). General Highway Map, Florence County, South Carolina (PDF) (Map). Scale not given. Columbia: South Carolina Department of Transportation. Retrieved June 5, 2014.
External links
- Media related to Interstate 20 in South Carolina at Wikimedia Commons
- Mapmikey's South Carolina Highways Page: I-20
- South Carolina @ Southeast Roads.com - Interstate 20
- I-20 in NC discussion on I-74 in North Carolina Progress Page, accessed October 4, 2005.