An MBTA bus (Boston public transit) passed my on the left within less than a foot of me this morning. Usually the buses are pretty good around bicycles, IMO. When he stopped to pick up some passengers further ahead, I passed him on the left and yelled "Too close!" as I passed the driver's window. I'm sure he didn't hear me though. Sigh...

It only just now dawned on me that I could have gotten the bus number.