Since my house is not far from the Interstate, and we have a great system running throughout Omaha, I tend to spend a lot of time on the road with trucks. Many times it can get a little hairy when those massive vehicles decide to change lanes and you are in the lane already.
But it turns out that there is a bad side to be on when passing a truck. If you approach, pass, or drive on the passenger side of the truck you are most likely in their blind spot and quickly going to become a part of the truck if you do not move. I know this from personal experience. If I can find the photos, I may tell that story and you can see just what a truck can do when it changes lanes onto you.
In the meantime I shall return to my tale. As I was driving the wife to a play we were passed by a flatbed truck that had come up with a novel way to remind drivers which side is NOT the correct side to pass them.
Needless to say, the point is very clear.