trainhq wrote:Well, I think the real question about South Station expansion is, how much more can actually
be done without FR/NB CR added in? I mean, what else is really important here; can they
get in a few more Worcester trains without it? Could they put in a wye (not cheap, obviously,
but still doable) and have some Indigo line trains turn at Back Bay? The point of it is, if FR/NB
is the driving element here,that's another $800 million on top of $2 billion, which is like, not
going to happen.
FR/NB is most definitely not the driving element. The schedule today has so many conflicting movements in and out on the lead tracks that many trains have to hog the platforms as de facto layovers between runs. It puts a very low ceiling on non-revenue moves in/out of Widett Circle during peak hours, the potential Fairmount schedule, the minor branch schedules, and even Worcester when Amtrak and Providence/Stoughton have to fan out into other lines' usual platform slots. They won't be able to realize full >2020 Amtrak, Providence/points-south, Worcester, and Fairmount service levels without it. The expanded station and additional crossovers help things the most by eliminating conflicting movements. I don't know how many simultaneous moves that allows...the proposed track charts will tell that story...but you can pretty much have an Old Colony or Fairmount in-transit from a platform at the same time as a Widett equipment move, an NEC, and a Worcester without any of them ever having to use the same track or pause for a conflicting movement. 4-6 simultaneous unimpeded movements or something like that where they'd be hard-pressed to have half that today.
The capacity increase will future-proof for full-blast Cape service, FR/NB, Foxboro, increased Franklin service if it went to Milford...and up to 1 more TBD branchline (Northboro-via-Framingham?). But the design isn't predicated on that because those are all branchlines. All the spoils could go to the existing alpha dog routes for dizzyingly frequent schedules. The goal of the expansion is realizing the theoretical max capacity of all the mainlines feeding the station--NEC, Worcester, Fairmount, Old Colony--and de-clogging the layover situation so equipment moves can shuttle at-will out of Widett/Southampton without having to lay over on the platforms because of conflicts on the lead tracks. Where the traffic fans out on the mains, what % gets allocated to the branches or Amtrak...that has nothing to do with SS. This just allows them to throw all the traffic at the mains (including restored tri/quad-tracking on the NEC out to Canton Jct., restored full double-track on the OC main, etc.) that those mains can truly handle...something SS was originally designed to do but hasn't been able to since it was chopped in half.