I think all the grade crossings between Boston and PVD were eliminated when the NEC was electrified. In the town I grew up in, one near my best friend's house in the second grade, was just blocked off. It was a dead end street, and to reach the two or three houses on the other side of the tracks, they extended the road to another street not far away through the woods.
That 2nd street had the other grade crossing, a hundred feet from where it ended at a major street parallel to the tracks. They blocked that street as well, making it a dead end with a turn-around area just before the tracks, and built a whole new street through a hilly wooded area to place where the natural elevation made it easier to build a bridge over the tracks, connecting to the major street. Then they built a bunch of McMansions and several new local streets in the woods. I think some developer made a lot of money because the original street went through a swampy area that was probably not buildable, but the new street gave access to dozens of buildable lots.
The only remaining grade crossings on the NEC are in Eastern Connecticut, near New London, and maybe one or two in southwest RI.