My mother -- who does insurance for a living -- sent me an ultra-high-vis vest a few months ago and I in my totally biased, anecdotal opinion, think drivers have been slightly better about giving me room when they pass and not just buzzing me. That said, high visibility does nothing for me when dinguses lay the horn on and tell me to move over and get out of their lane. When I'm all the way in the right lane, just about in the gutter, there's only so much moving over I can do. In those cases, though, I usually just yell something about my legal right to take the whole lane if I want. Not that it helps...