The state uses various signage on their trucks and equipment that goes vary slow when on the road. They are usually working on that road or parts of it. Some of them now have the light up signs say something like "SLOW. pass with care" or "use caution when passing".

 Since farmers are not working on the road, but simply transporting using the road, what do you suppose would be the legalities of using such signage or language on a light sign?

 I will ask a lawyer monday, but lawyers dont work weekends and I may forget about it if I dont ask here now and keep looking at it over the weekend.