When using public transit, keep an eye on the driver.Any time you have someone else driving, you should keep an eye on them.

Driving while tired or sleepy is said to be as dangerous, if not even more dangerous, than drunk driving. A recent study by the AAA found that one in six fatal car accidents were the result of driver fatigue.

If you see your driver's eyes getting heavy or his head starting to nod, do something. Switch with them if you can.  If you can't, make them pull over, talk to them, crank the radio, do something.

There is no telling how many lives you may save.