Earlier quoted context omitted.
In Boston cars are required to yield to pedestrians on turns, and many intersections have signs to remind them of this. That said, it's always a good idea to look and see what cars are actually doing, regardless of what laws and signals say.
Boston also has more "pedestrian scramble" all-way walk lights, a configuration less common in the rest of the US.
I have to cross a fairly wide, busy road to get to work. I wish it had a scramble with no-turn-on-red signage. That would make my commute massively safer.