9 5 5 . ▁To ▁the ▁west , ▁a ▁section ▁of ▁the ▁highway ▁through ▁S ull ivan ▁and ▁Del aware ▁Count ies ▁was ▁built ▁over ▁the ▁right - of - way ▁of ▁the ▁def unct ▁New ▁York , ▁Ontario ▁& ▁Western ▁Railway . ▁Most ▁of ▁the ▁S ull ivan ▁County ▁section ▁of ▁the ▁Quick way ▁was ▁completed ▁during ▁the ▁ 1 9 5 0 s , ▁with ▁the ▁first ▁section ▁within ▁the ▁county — between ▁Rock ▁Hill ▁( exit   1 0 8 ) ▁and ▁W ur ts bor o ▁( exit   1 1 4 ) — open ing ▁in ▁December ▁ 1 9 5 6 . ▁A ▁second ▁section , ▁from ▁Fer nd ale ▁( exit   1 0 1 ) ▁to ▁north ▁of ▁Liber ty ▁( exit   9 8 ), ▁was ▁completed ▁in ▁July ▁ 1 9 5 8 . ▁The ▁gap ▁between ▁W ur ts bor o ▁and ▁Fair ▁O aks ▁in ▁Orange ▁County ▁was ▁filled ▁on ▁October ▁ 2 3 , ▁ 1 9 5 8 , ▁while ▁the ▁section ▁between ▁Fer nd ale ▁and ▁Rock ▁Hill ▁was ▁completed ▁in ▁two ▁stages . ▁The ▁section ▁east ▁of ▁modern ▁exit   1 0 4 ▁in ▁Mont ic ello ▁was ▁opened ▁in ▁July ▁ 1 9 5 9 ; ▁the ▁part ▁north ▁of ▁that ▁point ▁opened ▁in ▁December ▁ 1 9 6 0 . ▁ ▁By ▁ 1 9 6 9 , ▁with ▁the ▁assistance ▁of ▁federal ▁fund ing ▁from ▁the ▁App al ach ian ▁Regional ▁Commission ▁proc ured