Orbit South Carolina Interstate speed limits
The posted limits on every Interstate in South Carolina, measured along each road: the limit you'll see most, and the range from the slowest stretch to the fastest. The highest Interstate limit in South Carolina is 70 mph.
| Interstate | Usually | Range |
|---|---|---|
| I-20 | 70 mph | 60 to 70 mph |
| I-26 | 70 mph | 55 to 70 mph |
| I-77 | 70 mph | 60 to 70 mph |
| I-85 | 65 mph | 60 to 70 mph |
| I-95 | 70 mph | 60 to 70 mph |
| I-126 | 60 mph | 35 to 60 mph |
| I-185 | 70 mph | 40 to 70 mph |
| I-385 | 70 mph | 55 to 70 mph |
| I-520 | 60 mph | 55 to 60 mph |
| I-526 | 60 mph | 55 to 65 mph |
| I-585 | 55 mph | 55 mph |
Posted limits as of October 2026, from state and federal road data and © OpenStreetMap contributors, measured by length of road. Work zones, weather and signs can set a lower limit; always follow the posted sign.
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