Somewhere on the board (maybe in the TransitMatters proposal thread?), the conversation turned briefly to what options would open up with an rehabilitated Framingham Secondary (the ROW that runs Framingham-Walpole-Foxboro-Mansfield). Someone suggested a Providence-centered commuter rail service running Framingham-TF Green, an idea I like, though only after a Worcester-Providence service has succeeded.
Rehabbing the full Framingham Secondary (though an idea I like) up to competitive passenger rail standards seems like it might not fall into "Reasonable Transit Pitches," but it did leave me thinking. With a fully rehabbed segment between Walpole and Mansfield (note that the current studies only focus on improving Walpole to Gillette), what other options open up?
Particularly if fares were lowered due to the lengthier journey, is there any viability using this corridor to create supplemental service?
For example: a service that runs down the Midland Corridor (through Fairmount-- maybe local, maybe semi-express, maybe express?), semi-expressing down the Franklin Line (maybe with stops only at Dedham, one of the Norwoods and Walpole? or just running express), turning and heading south through Foxboro and then running some or all of the way to Providence.
This would avoid the chokepoints on the Southeast Corridor, Canton Junction and the future chokepoint at the Canton Viaduct, once tri/quad-tracking extends north of Attleboro. Additionally, since it bypasses the Stoughton Line's territory entirely, it would take advantage of the extra capacity on the Shore Line south of Canton.
I see two obvious downsides.
First, lengthier travel time. The journey to Providence already exceeds 1 hour. I believe TransitMatters has proposed a slightly more compact timetable due to using EMUs, but even under the best circumstances, my back-of-the-napkin estimate would put Boston-Fairmount-Walpole-Providence in the neighborhood of 90+ minutes, competing against 70-minute express service, plus Amtrak's superexpress, which is actually not much more expensive than the T if you get a monthly pass. Offset the lengthier trip with a lower fare and perhaps somewhat more frequent service, and maybe it could competitive, but it'd be tough.
Second, the Fairmount-Franklin Line isn't amazing as a supplemental corridor. It has single track segments (including the bridge at Readville) that heretofore have not been a priority to address. And even if you expressed through all of the stops between Walpole and Readville (which seems neither logistically nor politically feasible), I definitely do not think expressing through the Fairmount Line stops is compatible with the more immediately-feasible goal of Rapid Transit frequencies on that corridor. So that's a half-hour ride before you even get out of Boston.
What I'm left with is that the BOS-PVD via FOX corridor might, someday, be a worst-case relief valve for when the Canton Viaduct chokepoint becomes more pressing. Maybe a couple of short-turns from Attleboro or Mansfield (where there is space to build a platform exclusively for the branch-- so short-turns wouldn't block the main line) could use it, like the Wildcat Branch up north.
(On the other hand, PVD-FOX commuter rail service, treating Gillette as a park-n-ride, with additional TOD-focused stops in Foxboro and Mansfield, is something I've long been a fan of.)
Anyone able to convince me to be more optimistic? Or other ideas about options that open up with a fully rehabbed Walpole-Mansfield link?