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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

Interstate 26 marker

Interstate 385 marker

Interstate 20 Business marker

Highway shields for I-26, I-385, and I-20 Bus. Spur
Map
Interstate Highways highlighted in red; future sections in blue; unbuilt sections in orange
System information
Maintained by SCDOT
Length862.60 mi (1,388.22 km)
FormedJune 29, 1956 (1956-06-29)[1]
Highway names
InterstatesInterstate XX (I-XX)
Business Loop:Interstate XX Business Loop (I-XX Bus.)
Business Spur:Interstate XX Business Spur (I-XX Bus.)
System links

Primary Interstates

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NumberLength (mi)[3]Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-20141.51227.74I-20 at the GA state lineI-95 / I-20 Bus. in Florence01964-01-011964current
I-26220.95355.58I-26 at the NC state lineUS 17 in Charleston01960-01-011960current
I-73——US 17 in Briarcliffe AcresFuture I-73 at the NC state lineproposed—Future designation along SC 22
I-74——Future I-74 at the NC state lineUS 17 in Garden Cityproposed—Future designation along SC 31
I-7791.05146.53I-26 in CayceI-77 / US 21 at the NC state line01975-01-011975current
I-85106.28171.04I-85 at the GA state lineI-85 at the NC state line01959-01-011959current
I-95198.76319.87I-95 at the GA state lineI-95 at the NC state line01968-01-011968current
  •       Proposed and unbuilt

Auxiliary Interstates

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NumberLength (mi)[4]Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-1263.6805.922I-26 / US 76 in ColumbiaUS 21 / US 76 / US 176 / US 321 in Columbia01961-01-011961current
I-18517.728.5I-385 in MauldinUS 29 in Greenville01961-01-011961currentToll road between I-385 and I-85.
I-3265.248.43I-26 in CayceSC 48 in Columbia01976-01-01197601995-01-011995[5]Was an unsigned designated route, replaced by I-77.
I-38542.1667.85I-26 near ClintonUS 276 in Greenville01962-01-011962current
I-5207.7212.42I-520 at the GA state lineI-20 in North Augusta02004-01-012004current
I-52619.2631.00US 17 / SC 7 in CharlestonI-526 Bus. / US 17 in Mount Pleasant01989-01-011989current
I-5852.253.62US 176 / US 221 / SC 9 in SpartanburgI-85 Bus. / US 176 near Spartanburg01959-01-011959current
  •       Former

Business routes

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NumberLength (mi)Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-20 BS2.1103.396I-20 / I-95 in FlorenceUS 76 Conn. / West Evans Street in Florence01970-01-011970current
I-85 BL8.77014.114I-85 northwest of FairforestI-85 east of Valley Falls01995-01-011995currentFreeway-grade business loop
I-126 BS0.600.97I-126 / US 21 / US 76 / US 176 / US 321 in ColumbiaUS 21 / US 76 / US 176 / US 321 in Columbia01980-01-011980—
I-385 BS0.4900.789I-385 / US 276 in GreenvilleUS 29 / SC 183 in Greenville01962-01-011962currentUnsigned business spur
I-526 BS1.5702.527I-526 / US 17 in Mount PleasantSC 703 in Mount Pleasant01992-01-011992current
I-585 BS1.602.57US 29 / US 176 / SC 9 in SpartanburgI-585 / US 176 / US 221 / SC 9 in Spartanburg01959-01-011959—
  •       Former

See also

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References

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  1. ^ Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Vol. 60, no. 1. Washington, DC: Federal Highway Administration. ISSN 0033-3735. Retrieved March 16, 2012.
  2. ^ Starks, Edward (January 27, 2022). "Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved January 23, 2023.
  3. ^ 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". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved January 23, 2023.
  4. ^ Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2021". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved January 23, 2023.
  5. ^ Special Committee on U.S. Route Numbering (April 23, 1995). "Report of the Special Committee on U.S. Route Numbering to the Standing Committee on Highways" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original (PDF) on October 16, 2017. Retrieved May 19, 2013.
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