. ▁was ▁de comm ission ed . ▁By ▁the ▁middle ▁of ▁ 1 9 5 4 , ▁SR   8 ▁Altern ate ▁was ▁red es ign ated ▁as ▁SR   1 6 6 ▁from ▁the ▁Alabama ▁state ▁line ▁to ▁n ortheast ▁of ▁Car roll ton ) ▁and ▁SR   6 1 ▁from ▁there ▁to ▁Villa ▁Rica . ▁ ▁Georgia ▁ ▁Ath ens ▁business ▁loop ▁ ▁U . S . ▁Route   7 8 ▁Business ▁( US   7 8 ▁Bus .) ▁in ▁the ▁Ath ens ▁– ▁Clar ke ▁County ▁metropol itan ▁area ▁is ▁a ▁B anner ed ▁U . S . ▁Highway ▁that ▁is ▁concurrent ▁with ▁Georgia ▁State ▁Route   1 0 ▁( SR   1 0 ) ▁for ▁its ▁entire ▁length . ▁Its ▁western ▁termin us ▁is ▁at ▁an ▁inter change ▁with ▁US   2 9 / SR   8 / SR   3 1 6 ▁and ▁US   7 8 / SR   1 0 , ▁sout heast ▁of ▁Bog art ▁in ▁O con ee ▁County . ▁Its ▁eastern ▁termin us ▁is ▁at ▁US   2 9 / US   7 8 / US   1 2 9 / US   4 4 1 / SR   8 / SR   1 0 ▁Loop / SR   1 5 . ▁The ▁road way ▁continues ▁as ▁US   7 8 / SR   1 0 . ▁ ▁All ▁of ▁US   7 8 ▁Bus . ▁in ▁Clar ke ▁County ▁is ▁included ▁as ▁part ▁of ▁the ▁National ▁Highway ▁System , ▁a ▁system ▁of