Grog makes a good point--take the lane. I read somehwere, and I believe it was actually on the Wisconsin Department of Motor Vehicles site, not just a defensive bicyling site, that if you are travelling "close" to the speed of traffic (and, on a small rural road 30 is pretty close to 35) you should take the full lane. The reasoning was that if you are travelling that fast, drivers need to really treat you like a car when they pass, not just as a slow moving vehicle. By taking the lane, you're telling them, "hey, I'm moving pretty close to your speed. Pass me as if I'm a car."

Oh, and the hand-wave, "STOP". Yeah, that works. I have a stretch of road where I like to go fast (OK, fast for *me* ). There is one intersection where cars turn onto the road. I watch that intersection closely and always insist on eye contact (or I hit the brakes). One guy was on his cell and didn't acknowledge me. I raised on waved my right hand--a great big, full arm wave. He looked up. He stopped. I liken it to the puffer fish--sometimes swimming along in bright colors isn't enough--a big arm wave makes me look bigger.