What ever driver should know:
The job I currently hold down might fall into the last category: Big Truck Driver. I drive a Big Truck for a living now, and while lots of people might consider that a fairly mundane way to spend 70-hour work weeks, I can attest that there is a lot that goes on that most people are simply not aware of. I know this personally, because driving a Big Truck exposes me to people every day, in every part of the country, who not only are not aware of what is going on with a Big Truck nearby, but are also unaware of how close they come to death by making bad decisions in its vicinity. Driving 400-plus miles a day for weeks at a time, I see the bodies on the roadside under the sheets often enough to know that some of them came too close.