We don't have them either. Our trailers are so old and raggedy that they may have been there once but have fallen off.
You can tell how much more time John has on the road than I do. You tend to think about things while driving, or at least I do. My runs are on the short end of the Fedex spectrum, and his are on the looonnnnggg end. I spend too much time in the office in front of a computer, spending money I'm not making, and of course, watching fail videos on Youtube.