If I could add to that a little, I think really the best thing to do is to try to make sure drivers don't become fatigued in the first place. We've done a lot of research that has looked at biorhythms. We actually have a software program we use that keeps track of people's roster time and tries to advise us when someone might be in a situation where they have not had the amount of sleep they might need to perform alertly.
On June 12th, 2012. See this statement in context.