The interchange in the northeast I'd most be interested in hearing about is the proposed reconstruction of the northern Interstates 93/95 in Woburn. It was supposed to start in 2017, but the community won't allow it. Does anyone have any updates on when/if this project will go forward, or is it likely to remain as-is until the ramps collapse?
Actually, I doubt the ramps would collapse. It's a cloverleaf, so there's no overpasses, bridge structures, flyovers within the interchange structure itself. The only bridge in that interchange is the I-93 overpass over 128/95.
As far as the "next big" project goes...
In CT, it's probably the I-91/CT 15/I-691 interchange in Meriden. See preliminary plans here:
https://portal.ct.gov/DOT79-240Though I wish it would be the CT 9 "remove the lights" project in Middletown. Maybe it will. It may be small on the scale of interchange projects, but big in the realm of finally making CT 9 limited access for its entire 40 mile length.
As far as I-84/CT 8, that is currently a rehabilitation project that is keeping the existing interchange intact in the end. While a full-scale reconstruction would be nice to get rid of the double-decked bridges and all the left exits/entrances and such, we're probably going to be stuck with it for the next 10+ years.
Perhaps the I-84/Aetna Viaduct project in Hartford will get off and running, but with new alternatives being discussed, it'll be awhile before that one grows legs. I'd be more concerned with the "ramps collapse" theory there, vs the I-93/I-95 in Woburn.
In New Hampshire, you have two big multi-year projects wrapping up... the Spaulding Tpke in Portsmouth/Dover and I-93 from Salem to Manchester. Next for NH will probably be attacking the Concord project on I-93, which will add another lane and deal with multiple interchanges, individually not as big as 10/6 in RI, but collectively bigger.