As a resident of the Springfield area, I've ridden the line SPG-NHV countless times through the years, most recently, Tuesday this week, both ways.
I've read about trackwork in Vermont delaying the SB Vermonter. In 'watching' its progress on Transitdocs.com almost every day, it's been anywhere from a few minutes to over an hour late arriving in Springfield in the past month or so. So be it. As one who has passed through track repair areas around the USA while listening to my scanner, any train through the area has to stop and contact the supervisor of the work area and await their permission to pass through at slow speeds account freshly laid/balasted/lined/<whatever> track. Whether the work crew can make a safe, clear path for the train in 1 minute or 1 hour depends on the situation.
As for between Springfield and New Haven, nearly all trains were bused from June through September 11 account major trackwork being done as well as a new platform 'shed' at the Hartford station. I also saw a rail train in July on Virtual Railfan Springfield arrive from the west, then reverse direction down the line towards New Haven. Riding the 5:55AM train from Springfield in late August, the train was spotted with some rails still on it. They completed their work, and FINALLY fixed, after 20 years or more, the horribly over-banked/superelevated curve at the south end of Springfield that had a 10mph speed limit on it. Everyone, including myself, expected the train to tip over it was banked so far. As of this past Thursday, while out taking pictures, there is still brand new rail dropped along the westernmost track through Longmeadow, just south of Springfield. So they are still working on the tracks, just not with the 'full track gang' of 15-20 machines (seen from #141 in the AM several times). As of Tuesday, I only spotted 5-6 track machines in various places in groups of 2s.
The good news is that they have smoothed out the track south of Hartford, especially the new/restored 2nd track installed maybe 5 years ago prior to the startup of CTRail between NHV and SPG. It was getting a bit bumpy, especially at speeds above 80.
Hopefully, they're get all the trackwork finished before the snow flies. As we've been having an 'early fall' with overnight temps in the low 50s and even low 40s a couple of times in the past couple of weeks, I wouldn't be suprised if we see snow sometime before Thanksgiving! About 10 years ago, we had a Halloween Eve snowstorm that was supposed to be mostly rain but they were totally wrong. It was sloppy, heavy, very wet snow for about 10-12 hours that took out electricity for 7-10 days for a lot of people.