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 | |
---|---|
System information | |
Maintained by SCDOT | |
Length | 862.60 mi (1,388.22 km) |
Formed | June 29, 1956[1] |
Highway names | |
Interstates | Interstate XX (I-XX) |
Business Loop: | Interstate XX Business Loop (I-XX Bus.) |
Business Spur: | Interstate XX Business Spur (I-XX Bus.) |
System links | |
Number | Length (mi)[3] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
I-20 | 141.51 | 227.74 | I-20 at the GA state line | I-95 / I-20 Bus. in Florence | 1964 | current | ||
I-26 | 220.95 | 355.58 | I-26 at the NC state line | US 17 in Charleston | 1960 | current | ||
I-73 | — | — | US 17 in Briarcliffe Acres | Future I-73 at the NC state line | proposed | — | Future designation along SC 22 | |
I-74 | — | — | Future I-74 at the NC state line | US 17 in Garden City | proposed | — | Future designation along SC 31 | |
I-77 | 91.05 | 146.53 | I-26 in Cayce | I-77 / US 21 at the NC state line | 1975 | current | ||
I-85 | 106.28 | 171.04 | I-85 at the GA state line | I-85 at the NC state line | 1959 | current | ||
I-95 | 198.76 | 319.87 | I-95 at the GA state line | I-95 at the NC state line | 1968 | current | ||
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Number | Length (mi)[4] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
I-126 | 3.680 | 5.922 | I-26 / US 76 in Columbia | US 21 / US 76 / US 176 / US 321 in Columbia | 1961 | current | ||
I-185 | 17.7 | 28.5 | I-385 in Mauldin | US 29 in Greenville | 1961 | current | Toll road between I-385 and I-85. | |
I-326 | 5.24 | 8.43 | I-26 in Cayce | SC 48 in Columbia | 1976 | [5] | 1995Was an unsigned designated route, replaced by I-77. | |
I-385 | 42.16 | 67.85 | I-26 near Clinton | US 276 in Greenville | 1962 | current | ||
I-520 | 7.72 | 12.42 | I-520 at the GA state line | I-20 in North Augusta | 2004 | current | ||
I-526 | 19.26 | 31.00 | US 17 / SC 7 in Charleston | I-526 Bus. / US 17 in Mount Pleasant | 1989 | current | ||
I-585 | 2.25 | 3.62 | US 176 / US 221 / SC 9 in Spartanburg | I-85 Bus. / US 176 near Spartanburg | 1959 | current | ||
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Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
I-20 BS | 2.110 | 3.396 | I-20 / I-95 in Florence | US 76 Conn. / West Evans Street in Florence | 1970 | current | ||
I-85 BL | 8.770 | 14.114 | I-85 northwest of Fairforest | I-85 east of Valley Falls | 1995 | current | Freeway-grade business loop | |
I-126 BS | 0.60 | 0.97 | I-126 / US 21 / US 76 / US 176 / US 321 in Columbia | US 21 / US 76 / US 176 / US 321 in Columbia | 1980 | — | ||
I-385 BS | 0.490 | 0.789 | I-385 / US 276 in Greenville | US 29 / SC 183 in Greenville | 1962 | current | Unsigned business spur | |
I-526 BS | 1.570 | 2.527 | I-526 / US 17 in Mount Pleasant | SC 703 in Mount Pleasant | 1992 | current | ||
I-585 BS | 1.60 | 2.57 | US 29 / US 176 / SC 9 in Spartanburg | I-585 / US 176 / US 221 / SC 9 in Spartanburg | 1959 | — | ||
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