Interstate 91 between exits 7 and 8
The Vermont State Police has several good hiding spots throughout this area. Coming southbound—one is buried in a grove of trees (you can’t even see them before you get to the actual u-turn). There is also one (further south) that is difficult to see coming south (it’s down a hill and across a long straightaway, and they can see you every step of the way) and impossible to see coming north (view blocked by large rocks).
Be careful through here. I’ve seen as many as two within these two exits (which is pretty nasty because I usually only see one cop, if that, on between the state line and Norwich). But they let me go (and several others) at about 78-ish.