I am immensely impressed at the degree to which Boston and Cambridge have improved their bicycling infrastructure in only the past few years. It's not Dutch-level, but relative to the US it's a dream. Get on street view and check out the new bike lane around the Common, which when paired with the footbridge over Storrow and the car-free Washington Street means you can get from the Charles River Path nearly all the way to Haymarket without sharing a lane with cars: https://maps.app.goo.gl/LXHJaEcaqnWbzt9E9

Or see the lovely separated lanes running past BU: https://maps.app.goo.gl/B6n5JyKd783wZjSv9

Or the new Harvard Square intersection: https://maps.app.goo.gl/CPxaadsJnqfskyNs7