They put a couple of these in Austin a few years ago ... but they hid them in some strange neighborhoods ... tiny little circles.

The first time I saw one it looked like a dead end street from half a block away. Even after I figured out what it was, I was too baffled to actually drive through it. I had this mental picture of some road crew guys hitting the bottle a little too hard before starting their work, and winding up with these whirly-doos or whatever.

Greg