The signs work very simply. They provide some type of message to the reader. It might alert them to danger, work ahead, or of a detour. It might even tell them that they are not allowed to enter a certain area. Others might tell you to slow down, or warn you about an open trench ahead. The signs can inform people of just about anything at all, and they are easy to use. Just place the stand and the sign in a location and then let it do the work for you.