Dan says his interest was piqued by an article about the abandoned Inner Belt/I-695 project (which is how the abandoned I-95 link would have gotten from 128 in the south to 128 in the north).
And so he started Google Viewing it. And came across something interesting on that stub ramp off the Deck that was built before the whole project was canceled, the one that you see as you get on I-93 north from Storrow Drive. Now he wonders: "What RedWings fan did this. And when."
According to aerial images at OLIVER, the state mapping system, the Wings backers struck sometime between 2015 and 2019.