  5 6 ▁is ▁generally ▁a ▁two - lane ▁rural ▁highway ▁that ▁exp ands ▁to ▁a ▁four - lane ▁urban ▁highway ▁in ▁Cl inton ▁and ▁Spart an burg . ▁ ▁It ▁travel s ▁ ▁in ▁a ▁north - s outh ▁direction , ▁though ▁it ▁is ▁signed ▁east - west ; ▁to ▁make ▁it ▁more ▁confusing , ▁sign age ▁in ▁Spart an burg ▁reverse ▁the ▁directions . ▁SC   5 6 ▁has ▁a ▁round about ▁inter change , ▁known ▁as ▁H ear on ▁Circle , ▁with ▁I - 8 5 ▁Business . ▁In ▁Cl inton , ▁sign age ▁that ▁by pass es ▁the ▁dow nt own ▁area ▁use ▁" TR U CK " ▁instead ▁of ▁normal ▁or ▁by pass ▁b ann ers ; ▁though ▁SC   5 6 ▁Business ▁is ▁signed ▁through ▁the ▁dow nt own ▁area . ▁ ▁History ▁SC   5 6 ▁was ▁established ▁in ▁ 1 9 2 8 ▁as ▁a ▁new ▁primary ▁route ▁from ▁SC   3 9 2 ▁( today ▁SC   3 9 ) ▁to ▁U . S . ▁Route   1 7 6 ▁( US   1 7 6 ) ▁in ▁Paul ine . ▁ ▁In ▁ 1 9 4 9 , ▁SC   5 6 ▁was ▁extended ▁north , ▁replacing ▁US   1 7 6 ▁to ▁US   2 9 ▁in ▁Spart an burg . ▁In ▁ 1 9 5 9 , ▁SC   5 6 ▁was ▁extended ▁north , ▁replacing ▁US   1 7 6 ▁along ▁As he ville ▁Highway ▁to ▁its ▁current ▁termin us