Live Chat I-77 Community Nearby Traffic US 78 SC 2024-05-04 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US 78 SC Mount Pleasant, SC 8.12 Sullivans Island, SC 9.30 North Charleston, SC 9.67 Interstate highway exits close to US 78 SC Exit 221, i26 2.56 Exit 221b, i26 3.04 Exit 221a, i26 3.15 Interstate highways close to US 78 SC i26 map 2.56 i526sc map 8.94 i95 map 72.51 State roads close to US 78 SC SC 30 map 1.46 US 17 SC map 1.77 US 78 SC map 1.90