Neal, I try the flashing brake lights, then I raise my fist up in the air like the hand signal for stopping (which by the average uneducated motorist who has completely forgot handsignals can also be construed as "I'm going to punch your lights out"), and usually the movement catches their eye enough that they wake up. If not, I keep going till I can put enough distance between us to find a place to turn off, then follow it with a hand gesture. My only fear is that if I don't find a place to give myself enough room, and start to slow down to turn off, the dipstick behind me won't be paying attention and will rear end me! It's almost happened once when turning in my drive way, and the woman behind me showed no signs of slowing down, so I floored it, and got enough room between us and pulled over
