▁Park way . ▁ ▁Route ▁ 3 ▁ex its ▁west ▁at ▁Massachusetts ▁Avenue , ▁while ▁Route ▁ 1 6 ▁continues ▁north ▁on ▁the ▁park way ▁into ▁Som er ville , ▁meeting ▁up ▁with ▁the ▁Myst ic ▁Valley ▁Park way ▁just ▁south ▁of ▁the ▁Myst ic ▁River . ▁ ▁Route ▁ 1 6 ▁follows ▁the ▁Myst ic ▁Valley ▁Park way ▁generally ▁east ward , ▁travel ing ▁beside ▁the ▁Myst ic ▁River ▁down stream ▁and ▁eventually ▁crossing ▁it ▁into ▁Med ford . ▁ ▁It ▁soon ▁is ▁joined ▁from ▁the ▁north ▁by ▁Massachusetts ▁Route ▁ 3 8 , ▁and ▁passes ▁near ▁Med ford ▁Square ▁( after ▁rec ross ing ▁the ▁river ), ▁where ▁Route ▁ 3 8 ▁ex its ▁to ▁the ▁south ▁on ▁Main ▁Street . ▁ ▁Route ▁ 1 6 ▁then ▁cross es ▁Inter state ▁ 9 3 ▁in ▁a ▁series ▁of ▁ram ps ▁that ▁include ▁on ram ps ▁to ▁the ▁north ▁and ▁south ▁of ▁I - 9 3 ▁from ▁Route ▁ 1 6 ' s ▁east bound ▁lan es , ▁and ▁a ▁r amp ▁from ▁I - 9 3 ▁south bound ▁to ▁Route ▁ 1 6 ▁east . ▁ ▁Route ▁ 1 6 ▁then ▁cross es ▁the ▁Myst ic ▁River ▁again , ▁reaching ▁the ▁Well ington ▁Circle ▁j unction ▁with ▁Massachusetts ▁Route ▁ 2 8 ▁in ▁Med ford . ▁ ▁This ▁j unction ▁marks ▁the ▁end ▁of ▁the ▁Myst ic ▁Valley ▁Park way ▁and ▁the ▁beginning ▁of ▁the ▁Re vere ▁Beach ▁Park way , ▁on ▁which ▁Route ▁ 1 6 ▁continues ▁east ward ,