I thought this article was interesting.

Self-driving cars get closer every day, but won't hit you

I was thinking about all the accidents that happen because people fall asleep at the wheel. If you had a system that could wake you up because it detected you weren't driving correctly that could save a lot of lives. I've also seen commercials for cars that have systems that alert you if your eyes close for too long.

I talked once to a truck driver that fell asleep at the wheel and said that he woke up with the clutch pedal stuck in his face. There were a bunch of accidents near where I live caused by people falling asleep at the wheel. Cal Trans redid the shoulders of the highway not too long ago and put bumps in the shoulder so that when you start to drive on the shoulder there is the bumping sensation that will hopefully wake up drivers falling asleep.