We had a driver here in So Cal, who dozed off for just a few seconds and struck farming equipment and flipped the UPS truck and rolled. Fortunately, He walked away, albeit with injuries. Driver fatigue, is what caused the accident, according to UPS and I assume the driver said the same. I've never heard of such a thing, but we can say, that drivers make mental mistakes because of feeling fatigued that lead to him or her to have an accident, either bodily injury or a vehicle accident while on route. Besides UPS, telling a person to get rest and take proper nutrition, what else can they possibly tell a driver. The subsequent ride-along, could not possibly train a person to avoid fatigue. Some days, we feel better than other, we might have more energy and a higher level of alertness, thou we got the same amount of sleep as the previous night. Has anyone been charged with an accident because of fatigue?