▁including ▁the ▁traffic ▁light - control led ▁inter sections ▁in ▁West chester ▁County , ▁have ▁inter change ▁numbers . ▁The ▁term ▁" B ron x ▁River ▁Park way " ▁originally ▁referred ▁to ▁the ▁Bron x ▁River ▁Res ervation , ▁New ▁York ' s ▁first ▁linear ▁park , ▁of ▁which ▁the ▁road ▁is ▁a ▁portion , ▁from ▁the ▁Bron x – West chester ▁county ▁line ▁to ▁K ens ico ▁Dam ▁Pla za . ▁ ▁Current ▁usage ▁of ▁the ▁term ▁is ▁conf ined ▁to ▁the ▁road way , ▁but ▁extends ▁it ▁to ▁the ▁portion ▁which ▁now ▁continues ▁south ward ▁beyond ▁the ▁Res ervation . ▁ ▁Route ▁description ▁The ▁southern ▁third ▁of ▁the ▁park way , ▁in ▁the ▁Bron x , ▁is ▁exclus ively ▁limited - access . ▁It ▁serves ▁as ▁a ▁comm uter ▁route , ▁intersect ing ▁several ▁major ▁east – west ▁routes . ▁Half way ▁through ▁the ▁bor ough ▁it ▁begins ▁to ▁closely ▁parallel ▁the ▁Har lem ▁Line ▁of ▁Metro - N orth ▁Rail road , ▁a ▁pair ing ▁which ▁continues ▁to ▁the ▁road ' s ▁northern ▁termin us . ▁ ▁In ▁West chester ▁County , ▁the ▁road ▁continues ▁to ▁have ▁the ▁same ▁character ▁until ▁the ▁Sp rain ▁Brook ▁Park way ▁spl its ▁off ▁at ▁Bron x ville , ▁allowing ▁most ▁through ▁traffic ▁to ▁by pass ▁White ▁Pla ins . ▁The ▁st ret ches ▁north ▁of ▁that ▁j unction ▁have ▁more ▁of ▁the ▁original ▁park ▁character , ▁and ▁are ▁still ▁used ▁that ▁way . ▁North ▁of ▁White ▁Pla ins ▁the ▁ex its ▁are ▁at