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Re: North-South Rail Link If I recall, TransitMatters was suggesting saving money by making the NSRL an EMU-only facility with grades even steeper than 3%. This is obviously a trade-off, but it would preclude through service on the Downeaster until the whole route up to Portland can be...

Re: North-South Rail Link I think the provisions made in the big dig mean that you can dig out whatever you want from under the Central Artery tunnels without worrying about what happens to the soil above, since the roadways are all supported by the slurry walls on the side, rather than by the...

Re: North-South Rail Link Baltimore is looking at building a new rail tunnel through town, and it seems pretty likely to happen. So I don't see why it's so unlikely that Boston's can happen too. Of course, comparing the B&P Tunnel project to the NSRL is not quite apples-to-apples but they are...

Re: North-South Rail Link To what extent is poor ridership on some of the lesser commuter rail branches an inevitable product of development patterns, where greater frequency wouldn't really help that much, and to what extent is the poor ridership on some branches simply a product of poor...

Re: North-South Rail Link A lot of folks here seem to have the idea that a four-track NSRL should allocate two of its tracks for the Red Line. I do see the motivation, since the Red Line is basically a four-track system south of JFK/UMass and effectively there is a bottleneck at that point...

Re: North-South Rail Link F-Line, This is the meat of the answer I was looking for. For some reason, I thought the tunnels and station caverns for NSRL were going to be basically just below the floor of the big dig highway tunnels. Given that metro lines where tunnels are excavated by TBM and...

Re: North-South Rail Link Have they already worked out how the underground portion of South Station will tie into the existing SS and SSX? ie, systems such as escalators, elevators, utilities, ventilation, emergency egress, etc. Would hate to wind up in a situation where they have to un-build a...

Re: North-South Rail Link Hi all, new here but wanted to add 2 more cents to the discussion. I would not dispute anything that F-line says about South Station and North Station both needing above-ground expansion in addition to the NSRL. However, descriptions of the South Station project...