Not a map, but things I've seen on the roads in Boston:
- Left turn only from left lane, straight or left from 2nd lane, straight or left from 3rd lane
- Green light and perpendicular traffic coming to me on the cross street, also going, because they also have a green light
- Two lanes, surprise! Lane markers go away it's one lane, not defined who yields, you guys can work it out
Pew pew pew