dj-- maybe, maybe, maybe that was 1.5 billion for the n-s tunnel (a provision for which exists underneath the central artery tunnel), but electrification, figuring out how to get trains from South Statation into the tunnel and an addition station, you're talking the tens of billions today.
There's a thread on the New Bedford proposal over at the MBTA forum, but I'll say here what I said there: it's a needed expansion but it just isn't going to happen in the next decade (barring a miraculous new funding mechanism for public transporation)....the money isn't there. This is the governor paying lip service to public transit.
A phantom ship, with each mast and spar
Across the moon like a prison bar...