List of Interstate Highways in South Carolina

Interstate Highways of South Carolina

Interstate 26 markerInterstate 85 Business markerInterstate 385 marker

Highway shields for Interstate 26, Interstate 85 Business Spur, and Interstate 385
System information
Maintained by SCDOT
Length: 862.60 mi (1,388.22 km)
Formed: June 29, 1956 (1956-06-29)[1]
Highway names
Interstates: Interstate nn (I-nn)
Business Loop: Interstate nn Business Loop
(I-nn Bus.)
Business Spur: Interstate nn Business Spur
(I-nn Bus.)
System links
  • South Carolina Highways

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]

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 1964current
I-26 220.95355.58 I-26 at the NC state lineUS 17 in Charleston 1960current
Future I-73 —— US 17 in Briarcliffe AcresFuture I-73 at the NC state line proposed— Future designated along SC 22.
Future 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 1975current
I-85 106.28171.04 I-85 at the GA state lineI-85 at the NC state line 1959current
I-95 198.76319.87 I-95 at the GA state lineI-95 at the NC state line 1968current
  •       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 1961current
I-185 17.7028.49 I-385 in MauldinUS 29 in Greenville 1961current Toll road between I-385 and I-85.
I-326 5.248.43 I-26 in CayceSC 48 in Columbia 19761995[5] Was an unsigned designated route, replaced by I-77.
I-385 42.1667.85 I-26 near ClintonUS 276 in Greenville 1962current
I-520 7.2011.59 I-520 at the GA state lineI-20 in North Augusta 2004current
I-526 19.2631.00 US 17/SC 7 in CharlestonI-526 Bus./US 17 in Mount Pleasant 1989current
I-585 2.253.62 US 176/US 221/SC 9 in SpartanburgI-85 Bus./US 76 near Spartanburg 1959current
  •       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 1970current Boulevard grade business spur.
I-85 Bus. 8.012.9 I-85 near WellfordI-85 near Spartanburg 1995current Freeway 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 1980— Was a boulevard grade business spur.
I-385 Bus. 0.701.13 I-385/US 276 in GreenvilleUS 29 in Greenville 1962current Unsigned boulevard grade business spur.
I-526 Bus. 1.802.90 I-526/US 17 in Mount PleasantSC 703 in Mount Pleasant 1992current 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 1959— Was a boulevard grade business spur.
  •       Former

See also

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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