Take I-77 S To Us-21 S/Cherry Rd In Rock Hill. Take Exit 82B-A-82C From I-77 S, Head South On I-77 S, Use The Right 2 Lanes To Take Exit 82B-A-82C Toward Us-21 S/Cherry Rd, Use The Left Lane To Merge Onto Us-21 S/Cherry Rd Via The Ramp To Rock Hill.