I have mixed feelings about Boston. On one hand there are actually a decent number of MUPs and the like that make it a little easier to get around. The Mayor has made making Boston a cycling friendly city a priority lately and it seems to actually be having an effect. That being said... a lot of the drivers are complete dinks. I generally don't have a problem but I'm 6' 2" and don't look like I would take well to being harassed. My girlfriend who is 5' 2" and fairly petite gets honked at and harassed on a fairly regular basis, although we've both noticed this pretty much doesn't happen when we ride together (only when we get slightly separated and are not obviously riding together.)
Glad I'm moving outside the city soon.
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2009 Bike Friday Season Tikit (commuting folder)
2007 Rivendell Atlantis (touring, general riding, errand runner, stuff hauler)
2007 IRO Mark V (SS)
2006 Rockhopper Comp Disc (Icebike)