▁it ▁meets ▁the ▁south ▁end ▁of ▁I - 3 9 0 ▁( exit   3 6 ) ▁near ▁Av oca ▁and ▁turns ▁sout heast ▁through ▁that ▁valley , ▁parallel ▁to ▁the ▁Er ie ' s ▁Ro chester – Paint ed ▁Post ▁line ▁( B uff alo , ▁New ▁York ▁and ▁Er ie ▁Rail road ). ▁ ▁I - 8 6 , ▁NY   4 1 5 ▁( old ▁US   1 5 ) ▁and ▁the ▁Er ie ▁branch ▁all ▁run ▁sout heast ▁along ▁the ▁C oh oct on ▁River ▁past ▁Bath ▁( exit   3 8 ) ▁to ▁P aint ed ▁Post ▁( exit   4 4 ), ▁now ▁the ▁north ▁end ▁of ▁Inter state ▁ 9 9 ▁and ▁US   1 5 . ▁NY   4 1 7   – ▁old ▁NY   1 7   – ▁also ▁ends ▁at ▁exit   4 4 , ▁while ▁NY   4 1 5 ▁continues ▁east ▁into ▁Cor ning ▁( ex its   4 5 – 4 6 ). ▁From ▁P aint ed ▁Post ▁through ▁Cor ning ▁to ▁Big ▁Fl ats ▁( exit   4 9 ), ▁I - 8 6 , ▁NY   3 5 2 ▁( old ▁NY   1 7 ) ▁and ▁the ▁Er ie ▁Rail road ▁run ▁through ▁the ▁Chem ung ▁River ▁valley . ▁NY   3 5 2 ▁begins ▁at ▁exit   4 5 , ▁west ▁of ▁dow nt own ▁Cor ning , ▁and ▁is ▁a ▁recently ▁by pass ed ▁four - lane ▁road ▁through ▁Cor ning . ▁East ▁of