, ▁More head , ▁past ▁Carter ▁C aves ▁State ▁Res ort ▁Park , ▁on ▁to ▁Gray son ▁and ▁finally ▁to ▁Ash land . ▁US   2 3 ▁south bound ▁follows ▁US   6 0 ▁east bound ▁into ▁Cat lett s burg , ▁where ▁they ▁split ▁at ▁ 3 5 th ▁Street . ▁US   2 3 ▁south bound ▁continues ▁straight ▁as ▁a ▁four - lane ▁highway , ▁while ▁US   6 0 ▁east bound ▁turns ▁onto ▁ 3 5 th ▁Street , ▁passes ▁Oak land ▁Avenue , ▁and ▁enters ▁Ken ova , ▁West ▁Virginia ▁via ▁the ▁Billy ▁C . ▁Clark ▁Bridge . ▁ ▁History ▁When ▁the ▁first ▁final ized ▁proposal ▁for ▁the ▁U . S . ▁Highway ▁System ▁was ▁presented ▁by ▁the ▁Bureau ▁of ▁Public ▁Ro ads ▁in ▁December ▁ 1 9 2 5 , ▁the ▁route ▁between ▁O z ark , ▁Missouri ▁and ▁what ▁would ▁become ▁U . S . ▁Route ▁ 5 2 ▁( US   5 2 ) ▁in ▁West ▁Virginia ▁near ▁Ash land , ▁Kentucky ▁was ▁originally ▁proposed ▁as ▁US   6 2 . ▁The ▁US   6 0 ▁design ation ▁was ▁proposed ▁along ▁a ▁different ▁highway ▁from ▁Los ▁Angeles , ▁California ▁to ▁Chicago , ▁Illinois ▁via ▁Tul sa , ▁Oklahoma . ▁On ▁December ▁ 8 , ▁ 1 9 2 5 , ▁a ▁compla int ▁was ▁registered ▁by ▁Kentucky ▁governor ▁William ▁J . ▁Field s ▁over ▁the ▁pla cement ▁of ▁the ▁US   6 0 ▁design ation , ▁being ▁unh appy ▁no ▁major ▁U . S . ▁High