I live in a smaller, rural community with few bike lanes and no bike paths (that I know of). When I ride, I do try to ride the few roads that actually do have a marked lane, but there is no way for me to get to those roads without traveling unmarked roads.

So when I'm on my bike and a vehicle makes a noticeable effort to give me room as they pass, I always try to give them a "thank you" wave. I figure it's just good karma and helps dispell the jack*** cyclist stereotype.

So do wave or otherwise acknowledge courteous drivers? Do you do anything for those drivers that "buzz" you?