Trinnau wrote: ↑Fri Dec 10, 2021 8:57 am
Pre-COVID MBTA ran a round-trip Worcester express train so the demand is certainly there. More infrastructure is needed Worcester-Boston to make the service work though with reasonable arrival and departure times. The commuter trains take up nearly all the available capacity. MBTA has a a few projects in the works already that east/west service would benefit from including the Worcester Station which is about to start construction and Worcester Third Track which is in design. They've already rebuilt a couple bridges and Natick Center station to allow for a new track. Still close to 2030 until all this will be ready for a new service though.
These upgrades are long overdue and will certainly help commuter ops. There's two or three (depending on how you think of it) inherent issues with the line.
1. No room for expansion inside 128 because of The Pike. This means you have to schedule any East-West trains to be able to slip past the heavy local traffic on the planned 3rd track while not disrupting the west of Framingham MBTA express trains.
2. Low speeds along the 3rd track segment. MAS varies between 50 and 70mph on the current track(slower in Weston/Wellesley, faster in Natick), so you're limited on how many trains you can squeeze past on that 3rd track segment.
3. Double track only between Worcester and Framingham. Again, you're dealing with the west of Framingham express trains that make all the stops between Worcester and Framingham.
2 and 3 are the more easily solvable problems than 1. There's enough space at all of the stations west of Framingham to add a passing track through the stations without encountering insurmountable issues(Southborough might be the exception). Speed could be addressed with some combination of track geometry improvements, and also maybe a different choice in rolling stock(Talgos anyone?)
I'm honestly not sure how 1 is solvable though, and that's the biggest bottleneck by far.