z ▁Field ▁and ▁west ▁of ▁P NC ▁Park . ▁While ▁limited - access , ▁the ▁road ▁becomes ▁Ohio ▁River ▁Bou lev ard , ▁named ▁for ▁the ▁river ▁that ▁PA   6 5 ▁par alle ls ▁for ▁ ▁between ▁the ▁city ▁of ▁Pitts burgh ▁and ▁the ▁bor ough ▁of ▁Ro chester . ▁Out side ▁of ▁the ▁city , ▁the ▁road ▁becomes ▁a ▁four - lane ▁at - grade ▁road way ▁to ▁Ro chester , ▁with ▁some ▁port ions ▁featuring ▁a ▁divided ▁highway . ▁North ▁of ▁Ro chester , ▁PA   6 5 ▁narrow s ▁to ▁two ▁lan es ▁and ▁passes ▁through ▁pre domin antly ▁rural ▁land , ▁running ▁concurrent ▁with ▁PA   1 8 ▁and ▁PA   2 8 8 ▁as ▁it ▁heads ▁north . ▁ ▁In ▁Pitts burgh , ▁the ▁bou lev ard ▁was ▁one ▁of ▁the ▁dead liest ▁roads ▁in ▁the ▁city ▁from ▁the ▁ 1 9 7 0 s ▁to ▁the ▁early ▁ 1 9 8 0 s . ▁ ▁Route ▁description ▁ ▁Al leg hen y ▁County ▁PA   6 5 ▁origin ates ▁at ▁a ▁tri angular - sh aped ▁inter change ▁at ▁the ▁I - 2 7 9 / US   1 9 ▁T ruck ▁conc urrency ▁near ▁dow nt own ▁Pitts burgh . ▁Long ▁ram ps ▁stretch ▁from ▁exit   7 A ▁on ▁I - 2 7 9 ▁north ▁of ▁the ▁Fort ▁Du ques ne ▁Bridge . ▁PA   6 5 ▁starts ▁as ▁a ▁limited - access ▁highway ▁known ▁as ▁the ▁" Oh io ▁River ▁Bou lev ard