Fairly certain we have had this discussion, and, no, one worker is not killed yearly in NYC during track work. And, sure, power rework and crossovers. The point is, it's possible and significantly less disruptive to passenger service as called out by the head of the MBTA himself.
Edit on the previous discussion of this:
Sadly, asking for something so basic in project management may be asking too much of the MBTA right now. Yes. The management complained about the FMCB meeting frequency, and how it made it a full time job generating PowerPoint presentations.
archboston.com