Interstate 77 in South Carolina
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| Route information | ||||
| Maintained by SCDOT | ||||
| Length: | 91.2 mi (146.8 km) | |||
| Existed: | 1975 – present | |||
| Major junctions | ||||
| South end: |
 I-26 in Cayce
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 I-20 in Columbia
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| North end: |
  I‑77 / US 21 at the NC state line |
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| Location | ||||
| Counties: | Lexington, Richland, Fairfield, Chester, York | |||
| Highway system | ||||
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| Location: | Cayce-Columbia, South Carolina |
| Length: | 20.0 mi (32.2 km) |
| Existed: | 1986–1995 |
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| Location: | Cayce-Columbia, South Carolina |
| Length: | 5.24 mi (8.43 km) |
| Existed: | 1976–1995 |
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| Location: | Cayce-Columbia, South Carolina |
| Length: | 8.5 mi (13.7 km) |
| Existed: | 1989–1995 |
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Interstate 77 (I-77) is a south–north interstate highway, extending 91.2 miles (146.8 km) in the state of South Carolina, extending from the national southern terminus at an interchange with I-26 near Columbia, north to the North Carolina state line near Rock Hill and Charlotte, NC.
I-77 is designated a Blue Star Memorial Highway for its entire length in South Carolina. The highway also has a trio of designations in the Columbia area. I-77 is named the Veterans Memorial Freeway from I-26 to the Congaree River, the William Earle Berne Beltway from the river to I-20, and the Charles F. Bolden Freeway from I-20 to the Richland–Fairfield county line.
I-77 begins at a semi-directional T interchange with I-26 in the city of Cayce. The interchange includes a pair of ramps between I-77 and Charleston Highway, which carries US 21, US 176, and US 321. I-77 heads east as a six-lane freeway that crosses over CSX's Columbia Subdivision and has a diamond interchange with SC 35 (12th Street Extension). The Interstate crosses the Lexington–Richland county line on its bridge across the Congaree River. I-77 has a partial cloverleaf interchange with SC 48 (Bluff Road), crosses Gills Creek, and meets SC 768 (Shop Road) at a cloverleaf interchange.
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Wikipedia