Boston-Cambridge
For the last three months I've been commuting part-way using Bluebikes bikeshare and public trans, but yesterday started doing the full commute using my own bike. Haven't done it in years. I'm thankful so much of the route has bike lanes. 20+ years ago, when I last did a full year of commuting, it was much different.
However the area around Berklee Music School / Symphony Hall is a disaster. Sure there are pylon-protected bike lanes, but that doesn't stop traffic from making sudden turns into the path plus a whole lot of construction and delivery vehicles in the way.
But for now that's my route until I get my legs and lungs back in shape to take a less busy route that has hills.