well, I am the dustee more than the duster. That's why I'm looking at upgrading my hybrid bike, a 1998 specialized crossroads. My speeds on my recumbent bike, a Cycle genius ALX are improving, but still a bit slow.

I'll use "passing left" as an announcement, although I just got bells for my bikes. I'm in an area with plenty of ethnic groups and I think sometimes they don't fully understand what I am saying. I'm not going to get an airhorn - that's just going to spook people - just like cars who get RIGHT behind you and BEEP. I prefer a subtler approach. Usually, there is enough room so that it is not a problem. One time, though, I crested a bridge on a 2-lane bike path and some birdbrain was passing in slow motion on the other side heading up. I yelled "TRACK" and geared up. He got the message.