Sleep driving story: I have a really good friend who used to commute about an hour to see his girlfriend. She was the VERY demanding type and would insist he visit her after he got off work - he was in the military, and often got out at 2 am, 3 am, sometimes later.

One time after coming back from her place at 4:30 am, he woke up to find himself hitting tons of those orange construction barrels. They had closed off a lane to take its surface off and re-asphault it, and he hit about three dozen of those orange and white barrels before swerving back into a real lane. His car, a 1992 Celica GT, was totally undamaged. He said he could see in his rearview mirror that the barrels were littered all over the highway - yikes!

After that, he took up books-on-tape.