▁on ▁the ▁north bound ▁( NB ) ▁and ▁south bound ▁( SB ) ▁sides ▁of ▁the ▁highway ▁at ▁the ▁following ▁locations : ▁N B ▁and ▁S B ▁in ▁Att le bor o ▁between ▁ex its ▁ 2 ▁and ▁ 3 . ▁N B ▁and ▁S B ▁in ▁Row ley ▁between ▁ex its ▁ 5 3 ▁and ▁ 5 4 . ▁ ▁Speed ▁limits ▁Between ▁the ▁Rh ode ▁Island ▁state ▁line ▁and ▁I - 9 3 ▁in ▁C anton , ▁and ▁again ▁between ▁the ▁northern ▁end ▁of ▁the ▁bel t way ▁and ▁the ▁New ▁Ham pshire ▁state ▁line , ▁the ▁speed ▁limit ▁is ▁ 6 5 ▁MP H . ▁The ▁sharp ▁transition ▁curve ▁from ▁I - 9 5 ▁north ▁onto ▁the ▁Route ▁ 1 2 8 ▁bel t way ▁in ▁C anton ▁is ▁posted ▁for ▁ 2 5   MP H . ▁Al ong ▁the ▁bel t way ▁the ▁speed ▁limit ▁is ▁ 5 5 ▁MP H , ▁and ▁the ▁speed ▁limit ▁on ▁the ▁transition ▁ram ps ▁at ▁Exit ▁ 4 5 ▁at ▁the ▁I - 9 5 / Route ▁ 1 2 8 ▁split ▁in ▁Pe ab ody ▁is ▁ 4 5   MP H . ▁ ▁References ▁ ▁External ▁links ▁ ▁Massachusetts ▁ 9 5 ▁Category : Transport ation ▁in ▁Br istol ▁County , ▁Massachusetts ▁Category : Transport ation ▁in ▁Es sex ▁County , ▁Massachusetts ▁Category : Transport ation ▁in ▁M idd les ex ▁County , ▁Massachusetts ▁Category : Transport ation ▁in ▁Nor folk ▁County , ▁Massachusetts ▁Category : H istor ic