There wouldn't really be a strong need for integrating to Keolis/the MBTA Commuter Rail anyway, on an operational level. BOS-WOR stopping services (e.g. anything the T currently runs except for Heart-to-Hub) are extremely unlikely to run west of Worcester, at least not on the B&A itself. Density drops off sharply on the B&A after Worcester and doesn't pick up again until Palmer, at which point you are in Springfield commuter territory. There is no "Wachusett", "Plaistow" or "TF Green" one-stop extension that would see enough demand to Boston to make the one-seat ride worth it (in my opinion).
There might be "super commuter" demand from Palmer, but you'd need those services to run mostly express east of Worcester to make a reasonable travel time. That points back to Amtrak, who has intercity equipment and would be running an intercity schedule that skips the Southboros of the world. The stretch between Palmer and Worcester is very unlikely to ever warrant commuter rail as we know it today.
There
are potential commuter rail corridors that center on Worcester:
- Auburn-Webster-Danielson-Norwich-New London
- Milbury-Woonsocket-Providence
- Clinton-Ayer-Lowell
- Leominster-Fitchburg via commuter bus on 190
But all those routes currently don't exist, so there's no particular impetus to integrate into Keolis/MBTA Commuter Rail. And indeed, the Woonsocket line would probably get operated by RIDOT's contractor, and the New London one would potentially be operated by CTRail (both via duplicates of the Attleboro Agreement). And anyway, they are all more or less independent of what gets done on the B&A -- the only major impact being a small potential ridership increase if more express (i.e. intercity) services start running WOR-BOS, enabling a two-seat ride to Boston (e.g. Webster-WOR>WOR-BOS).
It'll be extremely important to have
schedule coordination between all these different services. But that can be done between agencies without full-on integration.
The first step is to get Downeaster-style supercommuter service going between Springfield and Boston. Once that is in place, you can look at occasional commuter+supercommuter service patterns, e.g. train leaves Greenfield at 7:15, runs local and arrives in Springfield at 8:15, before running express to Boston to arrive by 10:30 (supplementing a few additional Greenfield-Springfield commuter runs). But even in that universe, the commuter rail in the Knowledge Corridor is going to be much more aligned operationally (and potentially structurally) with Hartford than with Boston. The Greenfield-Springfield-Boston service will almost certainly be run by Amtrak and not a commuter rail provider.
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That all being said: to the riding public, what they'll notice the most is what's painted on the side of train. For the next 10 years, I'm guessing it'll likely still be Amtrak livery. But, like I said earlier, it's possible that at some point the Powers That Be will decide to rebrand. Assuming this operation gets large enough to have a dedicated fleet, then sure -- they might paint over the Amtrak logo with something else. Maybe it'll be something à la "Amtrak California" and maybe they'll slap a T logo on there and roll with it. (Unlikely, but.) In that case, the riding public might think of it as "extending the T to Springfield," but it'll still be Amtrak for all practical purposes.