Live Chat I-77 Community Nearby Traffic US 21 SC 2024-06-03 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US 21 SC Liberty Hill, SC 15.85 Blythewood, SC 16.98 Winnsboro, SC 18.44 Interstate highway exits close to US 21 SC Exit 34, i77 10.58 Exit 41, i77 12.99 Exit 27, i77 15.52 Interstate highways close to US 21 SC i77 map 10.58 i20 map 24.08 i26 map 36.78 State roads close to US 21 SC SC 34 map 5.16 US 21 SC map 6.73 SC 97 map 15.68