They came in at #13 on that list. While traffic's bad in Boston, commuting via public transit is actually a viable alternative. It's very dense and has a solid commuter rail system in addition to an expansive (if aging) subway system. It's also very bike / pedestrian friendly.

Yea I lived in Boston and now Seattle. Boston was much worse and my commute a shorter distance in Boston took longer (not downtown)

That’s true, but Boston has a huge public transit network. My commute, 14 miles from a suburb to downtown, is a 14 minute train ride. Seattle is getting there with the link but it’s still decades away from being even close to what Boston has