It seems to be an epidemic where I am. Lawn guys with slow moving vehicle (SMV) signs on the back of their trailer gates. Some have one, some have two, one on each side. To those who don't know, this is a misuse of signs. They are intended for use on slow moving vehicles, those that do not normally reach speeds of 25mph. Farm equipment, Gators and other utility vehicles etc. If it's on a trailer being towed by your truck it doesn't belong there and you can actually be cited for it. If you want to put one on the back of your mower seat, fine, but if you do it's supposed to be covered while you're trailering it. Sorry for the rant...no I'm not, it drives me nuts, lol.