  4 3 0 , ▁which ▁( al ong ▁with ▁NY   3 9 4 ) ▁carried ▁NY   1 7 ▁to ▁West field ▁before ▁the ▁ 1 9 8 0 s ▁extension . ▁From ▁B em us ▁Point ▁to ▁Jam est own ▁( exit   1 2 ), ▁I - 8 6 ▁par alle ls ▁the ▁old ▁NY   1 7   – ▁now ▁NY   4 3 0   – ▁along ▁the ▁n ortheast ▁shore ▁of ▁Ch aut au qua ▁Lake . ▁The ▁Er ie ▁Rail road ▁extension ▁to ▁Chicago ▁( built ▁as ▁the ▁Atlantic ▁and ▁Great ▁Western ▁Rail road ) ▁comes ▁into ▁Jam est own ▁from ▁the ▁south west , ▁and ▁par alle ls ▁I - 8 6 ▁to ▁its ▁j unction ▁with ▁the ▁Er ie ' s ▁original ▁main ▁line ▁to ▁D unk irk ▁at ▁Sal aman ca . ▁ ▁From ▁Jam est own ▁to ▁Sal aman ca , ▁the ▁old ▁NY   1 7 ▁( now ▁mostly ▁NY   3 9 4 ), ▁the ▁new ▁I - 8 6 ▁and ▁the ▁rail road ▁run ▁generally ▁parallel ▁through ▁river ▁valle ys . ▁The ▁transport ation ▁routes ▁run ▁along ▁the ▁Ch ad ako in ▁River , ▁C one w ango ▁Creek ▁and ▁Little ▁C one w ango ▁Creek ▁to ▁Ste amb urg ▁( exit   1 7 ), ▁cutting ▁east ▁to ▁the ▁Al leg hen y ▁River ▁at ▁C olds pring ▁there . ▁The ▁valley ▁of ▁the ▁Al leg hen y ▁takes ▁the ▁routes ▁to ▁Sal aman ca ▁( exit