ved ▁Transport ation ▁Fac ilities ▁further ▁considered ▁this ▁conversion ▁( and ▁a ▁connection ▁to ▁the ▁East ▁Boston ▁T unnel ) ▁as ▁well ▁as ▁running ▁rapid ▁trans it ▁lines ▁along ▁existing ▁main line ▁rail ro ads ▁to ▁replace ▁inner ▁sub urb ▁local ▁stops . ▁ ▁The ▁conversion ▁proposal — which ▁would ▁have ▁involved ▁a ▁continuous ▁tunnel ▁running ▁from ▁Lake ▁Street ▁in ▁Bright on ▁to ▁Ma ver ick ▁Square ▁in ▁East ▁Boston , ▁plus ▁a ▁second ▁through ▁route ▁from ▁ ▁to ▁T rem ont ▁Street ▁in ▁Ro x bury — was ▁never ▁implemented ▁except ▁for ▁the ▁partial ▁completion ▁of ▁the ▁Hun ting ton ▁Avenue ▁Sub way ▁in ▁ 1 9 4 1 . ▁However , ▁many ▁of ▁the ▁other ▁extension ▁propos als ▁were ▁partially ▁or ▁wh olly ▁completed , ▁with ▁the ▁opening ▁of ▁the ▁Blue ▁Line ▁to ▁ ▁in ▁ 1 9 5 4 , ▁the ▁High land ▁Branch ▁conversion ▁to ▁light ▁rail ▁in ▁ 1 9 5 9 , ▁the ▁partial ▁conversion ▁of ▁the ▁Reading ▁Hill ▁Line ▁to ▁the ▁Hay market ▁North ▁Ext ension ▁in ▁ 1 9 7 7 , ▁the ▁extension ▁of ▁the ▁Red ▁Line ▁to ▁ ▁in ▁ 1 9 8 0 , ▁and ▁the ▁re location ▁of ▁the ▁Orange ▁Line ▁to ▁the ▁South west ▁Cor rid or ▁in ▁ 1 9 8 7 . ▁Two ▁additional ▁projects ▁were ▁considered ▁in ▁the ▁report ▁but ▁not ▁recommended ▁for ▁immediate ▁work : ▁a ▁circum fer ential ▁route ▁which ▁would ▁re app ear ▁years ▁later ▁as ▁the ▁Urban ▁Ring , ▁and ▁an ▁extension ▁of