List of Interstate Highways in South Carolina

There are 11 Interstate Highways—5 primary and 6 auxiliary—that exist entirely or partially in the U.S. state of South Carolina. As of December 31, 2013, the state had a total of 850.80 miles (1,369.23 km) of interstate and 11.80 miles (18.99 km) of interstate business, all maintained by the South Carolina Department of Transportation (SCDOT).[2]

Interstate Highways of South Carolina
Highway shields for Interstate 26, Interstate 385, and Interstate 85 Business Spur
System information
Maintained by SCDOT
Length862.60 mi (1,388.22 km)
FormedJune 29, 1956 (1956-06-29)[1]
Highway names
InterstatesInterstate nn (I-nn)
Business Loop:Interstate nn Business Loop
(I-nn Bus.)
Business Spur:Interstate nn Business Spur
(I-nn Bus.)
System links

Primary Interstates
Number Length (mi)[3] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-20 141.51227.74 I-20 at the GA state lineI-95/I-20 Bus. in Florence 01964-01-011964current
I-26 220.95355.58 I-26 at the NC state lineUS 17 in Charleston 01960-01-011960current
I-73 —— US 17 in Briarcliffe AcresFuture I-73 at the NC state line proposed— Future designated along SC 22.
I-74 —— US 17 in Garden CityFuture I-74 at the NC state line proposed— Future designated along SC 31.
I-77 91.05146.53 I-26 in CayceI-77/US 21 at the NC state line 01975-01-011975current
I-85 106.28171.04 I-85 at the GA state lineI-85 at the NC state line 01959-01-011959current
I-95 198.76319.87 I-95 at the GA state lineI-95 at the NC state line 01968-01-011968current
  •       Future

Auxiliary Interstates
Number Length (mi)[4] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-126 3.685.92 I-26/US 76 in ColumbiaUS 21/US 76/US 176/US 321 in Columbia 01961-01-011961current
I-185 17.7028.49 I-385 in MauldinUS 29 in Greenville 01961-01-011961current Toll road between I-385 and I-85.
I-326 5.248.43 I-26 in CayceSC 48 in Columbia 01976-01-01197601995-01-011995[5] Was an unsigned designated route, replaced by I-77.
I-385 42.1667.85 I-26 near ClintonUS 276 in Greenville 01962-01-011962current
I-520 7.2011.59 I-520 at the GA state lineI-20 in North Augusta 02004-01-012004current
I-526 19.2631.00 US 17/SC 7 in CharlestonI-526 Bus./US 17 in Mount Pleasant 01989-01-011989current
I-585 2.253.62 US 176/US 221/SC 9 in SpartanburgI-85 Bus./US 76 near Spartanburg 01959-01-011959current
  •       Former

Business Routes
Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-20 Bus. 2.003.22 I-20/I-95 in FlorenceUS 76 in Florence 01970-01-011970current Boulevard grade business spur.
I-85 Bus. 8.012.9 I-85 near WellfordI-85 near Spartanburg 01995-01-011995current Freeway grade business loop.
I-95 Bus. 5.79.2 I-95 near WalterboroI-95 near Walterboro proposed— Proposed boulevard grade business loop.
I-126 Bus. 0.600.97 I-126/US 21/US 76/US 176/US 321 in ColumbiaUS 21/US 76/US 176/US 321 in Columbia 01980-01-011980— Was a boulevard grade business spur.
I-385 Bus. 0.701.13 I-385/US 276 in GreenvilleUS 29 in Greenville 01962-01-011962current Unsigned boulevard grade business spur.
I-526 Bus. 1.802.90 I-526/US 17 in Mount PleasantSC 703 in Mount Pleasant 01992-01-011992current Boulevard grade business spur.
I-585 Bus. 1.602.57 US 29/US 176/SC 9 in SpartanburgI-585/US 176/US 221/SC 9 in Spartanburg 01959-01-011959— Was a boulevard grade business spur.
  •       Former
  •       Future

See also
  •  United States portal
  •  U.S. Roads portal

References
  1. Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Washington, DC: Federal Highway Administration. 60 (1). ISSN 0033-3735. Retrieved March 16, 2012.
  2. "Federal Highway Administration (FHWA) Route Log and Finder List: Table 3 - Interstate Routes". FHWA. Retrieved March 10, 2014.
  3. "Federal Highway Administration (FHWA) Route Log and Finder List: Table 1 - Main Routes". FHWA. Retrieved March 10, 2014.
  4. "Federal Highway Administration (FHWA) Route Log and Finder List: Table 2 - Auxiliary Routes". FHWA. Retrieved March 10, 2014.
  5. "AASHTO Route Numbering Committee Agenda (1995-04-22)" (PDF). North Carolina Department of Transportation. July 28, 1995. Retrieved May 19, 2013.
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