Hi Son

Brian has some good points. But I'm going to look into the whistle a bit more, when I get back on my bike (not there yet for commuting).

Brian, I've now caught up with you on number of posts. Keep up the good information though.

The problems of communication, rather than just sound, probably should be expanded for bicyclists. There are problems with any body motion, as it can be destabalizing (something I'm pretty acutely aware of right now), depending upon where you are on the bike (going downhill, for instance).

I've felt that looking at motorists was an important part of the equation, but am re-analyzing this in light of my recent accident. It seems that we don't want to do anything which keeps us from knowing about everything around us, and so it is hard to concentrate on one single situation developing either head or behind us. To do so neglects other situations which can be just as hazardous.

John