Rivers --- That's the point of this thread -- reasonable discussion of prioritization, funding options and desireability of things which the community and / or the T has done some preliminaries and which unlike the N/S tunnel are potentially fundable in the next 20 years
I would certainly agree that because of the benefits to more than one entity that electrification of the Worcester route is a "Reasonable" and then depending on the rail usage the DMU options could be likewise
Cool.
But I still don't understand why the 9 mile Fairmount DMU Line is reasonable, while the 10/11 mile Newton/Waltham DMU Lines are not because of the "distance", especially when the D line runs almost 12 miles.
I thought that the JP community DID want the E line restored, but the MBTA won't do it because they want to get rid of all in-traffic rail (note that they tried to start phasing out E past Brigham during the funding crisis, but didn't get away with it). I don't think it's a matter of support, it's a matter of the T not wanted to deal with traffic-running trolleys. I'm not sure about Allston/Brighton's thoughts on the A Line, but I anecdotally know a lot of people who live around Oak Square and would rather have Green Line service than the 57 Bus. Street running is very annoying for drivers, I'm not fond of it myself and if this were crazy transit pitches, I'd say tunnel the whole damn thing. I'm not aware of any studies on A line restoration, but it's a big hole in the system.
I have talked with a couple of people who live in JP and they were definitely
not on-board (haha, a pun) with the restoration of the trolley. I can't quite remember their reasoning, but I think it was along the lines of, "If the trolley breaks down, you're screwed. If the bus breaks, you reroute," with the implication that they don't see a need for further development of the area. These people were not "old guard" JPers, so I wonder what the results would be if there was a poll taken in all of JP about the restoration of the E.
As for Allston/Brighton, I think, assuming the T could get funding for the creation of the maintenance facilities, DMU's along the Worcester Line, with infill stops at, say, Boston University, Cambridge Street, Market Street and Newton Corner, would be more likely to happen than a restoration of the A, even if only to Oak Square. The DMU solution still leaves the Oak Square area without much, but nothing really seems to be that likely to go there.
The only thing I can think of, purely from a routing perspective, would be to extend the B line up Lake Street, turn left on Washington Street and loop at Oak Square. The problems with this are obvious: Only serves a small part of Brighton, Lake Street is a very residential-looking street that is currently one-way, and, of course, the B line is in awful shape as is. The plus to this is that it would get service to Oak Square in the middle of a "transit desert" between the Newton Line and the B Line with only 1.1 miles of new track (as opposed to 2.3 with the traditional A Line routing).