I feel your pain. I only ride for pleasure, but sometimes it sure doesn't feel like it. Due to the rampant corruption and misappropriation of funds here in IL, the roads are oftentimes horrible, and when they do fix them they take 2 weeks to fill in a small pothole. And don't get me started on the drivers. I lived in southern IL for some time, and the people were great, but up here, they are truly awful. It's like every a-hole's goal to get as close to you as possible.

I've been thinking about getting a Delta Airzound bike air horn. 105db I believe. I've heard some great stories of these things saving people and making for an overall safer ride.
http://www.amazon.com/Delta-Airzound...=15H5OABL3NL9T