List of Interstate Highways in South Carolina
From Wikipedia, the free encyclopedia
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]
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Length862.60 mi (1,388.22 km)
FormedJune 29, 1956[1]
InterstatesInterstate XX (I-XX)
Business Loop:Interstate XX Business Loop (I-XX Bus.)
| Interstate Highways of South Carolina | |
|---|---|
.svg)  Highway shields for I-26, I-385, and I-20 Bus. Spur | |
 Interstate Highways highlighted in red; future sections in blue; unbuilt sections in orange | |
| 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 | |
Primary Interstates
| 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 | ||
| ||||||||
Auxiliary Interstates
| 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 | 1995[5] | Was 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 | ||
| ||||||||
Business routes
| 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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