I know this has been in the works for years but is it ever going to happen? They could follow the old narrow gauge ROW (whats left of it). Anyone hearing anything??
This was studied several years ago. The old narrow guage route was not considered feasible; any line extension would cut over to the CR line, then run up there to Lynn/Salem. The line was sent to FTA for funding; I think it's still in the queue.
As for when, well, that's a ways off. Green Line to West Medford and CR to Fall River/New Bedford are in front of it, and those are years away from construction, if ever. I'd say 2015 at the very earliest, and even that
would be hard to do. Don't hold your breath.