Tony Woodlief has some great ones. I particularly like numero dos–it’s my top peeve.

When I’m made Lord Emperor of the Universe, one of my first acts will be to remove all signs that say “Slower Traffic Keep Right,” and replace them with the more accurate “Left Lane For Passing Only.”

No one thinks that they’re slower traffic, so the first version isn’t effective. The second should be the rule, and it should be a hefty fine, perhaps even prison time, if you’re passed on the right by three consecutive cars. I kvetch about the Europeans a lot, but there are a few things they get right, and lane discipline (particularly in Germany) is one of them.

Of course, if you’re poking along down the autobahn at a mere 130 kph or so, you’re likely to get a Lamborghini or M3 rammed up your tailpipe…