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I do agree with @TheRatmeister that it shouldn't be a problem. The T is already planning for concrete, real-world goals of running 2-car Type 10 hyper trains on today's Green Line, so they'll have to consider the fact that they can't berth two trains on the same platform (even if they do now --...

I'd guess that's much more feasible than turning 25-40 tph at Park St, simply because the Seaport Transitway has a lot more options on the eastern end to terminate trains. Obviously I'm not a train operator myself, but AFAIK, a lot of the time-killers in terminal operations actually come from...

I'll get to the (excellent discussions of) SL Phase 3 engineering details at a future date, but just a quick nitpick on a particular point: An implicit assumption of your "4,000 vs. 7,800" is that you get the Marginal Rd subway for free (Back Bay - the Highway Interchange District), or that...

In response to @TheRatmeister's comment, I'll start here: The spirit of this plan seems identical to my 2x2 plan, in that both aim to enable all 4 connections between pairs of destinations: (Kenmore / Huntington) -- (Park St / Seaport). @Riverside also implied that while he didn't explicitly...

Something similar to this has been mentioned in my 2x2 plan (posted again here for convenience): Specifically, the N bullet (Magenta Line) basically does what you said -- except that I have N trains use Huntington Ave subway until Copley, then build flyovers for it to converge to the...

That's an interesting thought, but I would argue that Tripod can also do this if you feed the street-running segment into the Huntington end for through-running to downtown, as opposed to feeding into Kenmore and the Central Subway. (Of course, that requires you to get rid of the perfectionism...

I think the main point here that I didn't realize beforehand is: You're implicitly assuming some Huntington trains would regularly turn at Park St inner loop under Criss-Cross. Now with this detail, I'm fully onboard, and I do agree that Criss-Cross can still be a capacity boost even for...

For one thing, even under Tripod, the Tremont St subway (say, North Station to Bay Village) still sees much higher frequencies than the Seaport "branch". This is because Tremont will see supplemental trains from Nubian: in fact, most Tripod GLR proposals, including Riverside's and mine, have...

A couple comments on other topics being brought up: Engineering between Bay Village (Marginal St) and South Station (SL Transitway) I had previously raised some doubts about this segment in December 2023. At that time, the prevailing proposal -- before most people paid heavy attention to it --...

With that said, there is an alternative that lets you add supplemental service to Huntington under Criss-Cross. Presenting to you, a very quick and rough drawing of the 2x2 / "Full Criss-Cross" model: Disclaimer: The number of routes ("bullets") per branch matches my intentions. However, the...

Hey guys, I'm back! I've sadly been away from all the excellent discussions (both in this thread and elsewhere on archBoston) the last few months, as my IRL schedule simply didn't allow catching up on everything on this forum. I'll gradually dig through several months of archives, so you can...

A problem is that part of the T12's intention was probably to connect Seaport, as a destination (employment or otherwise), to residential areas of Roxbury and possibly further west. Stopping it at Andrew would break that, and in general, would make it a "neighborhood to neighborhood" route that...

Not surprising when access to the entire Inner Belt GLMF, where the E's fleet is primarily based out of, is cut off.

I have to disagree with this, especially #2, and agree with @samsongam's subsequent response here. The logic is essentially the same as "Fairmount Line definitely shouldn't be commuter rail, because it deserves HRT vehicles with ample standing room". Both are making perfection in mode choice be...

FWIW, the official name for the combined SL4/5 seems to be SL5.

While the 501 and 504 (not 503) will likely be much less necessary in a world with quality service at Newton Corner... I don't know why people are talking about scrapping the 57??? The 57 is the only bus route along most of its corridor, and even at places where it intersects with other bus...

Except that Nubian routes aren't competing with Riverside and Needham for frequency. Let's be handwavey and say any GL trunk can support 4 branches. Riverside and Needham only take up 2 of them, and chances are they won't both go to Tremont St (you probably want to send one of them to...

To clarify: Are the East Taunton short-turns operating all day or just during late night hours? The fact that both ideas (late night and East Taunton) are mashed together in the second paragraph doesn't help with the clarity.

IIRC, @F-Line to Dudley said before that the bottleneck after Bowdoin is gone would be the State St curve, but he also said it was modifiable.

I know there was a discussion a few months ago about why the T isn't running more Green Line trains to North Station. Interesting to see they were thinking of doing it at some point. Some Reddit users in that thread had speculated it was because turning trains around at North Station is more...