In a sense, the problem is that from SPG south there are multiple ways to handle that Vermonter...and as such, multiple ways for VT to offload capital costs and/or reduce the operating subsidy. For example, it may make more sense to run the train NYP-MTR with Massachusetts running a connecting train BOS-SPG...but if MA wants to kick in some, I could see the train running BOS-MTR with the "stub" (be it a Regional or something CT would nominally sponsor) running NYP-SPG. Or the train might get split/combined at SPG (which is probably a viable proposition since the route is not excessively long and while there may be delays, it's not like NYP-SPG is the Hi Line).