I understand the ecological benefits, but there are plenty of snags in the woods that aren’t 5 feet from roads. And absolutely, all dead trees near roads and power lines are cut here, and much of this area is heavily wooded. In fact every dead tree within a certain distance of a roadway is required to be removed within a specified timeframe (don’t remember exactly what it is).
The importance of that became all too clear after the ash borers tore through a decade ago, lining the roadways with snags that inevitably dropped on cars and people. By the end of 2018 all of them that weren’t cut down had dropped naturally except in the most sheltered locations, it was ~2yrs at most.