Signs play a very significant role in the purpose in our purpose in everyday life. On the way to services today you may have depended on a traffic sign to get you here safely, whether it was a stop sign, speed limit sign. I hate them but no. But they do direct and guide our travels. A traffic sign can indicate a hazard ahead on the road that may be not readily apparent to the driver. We depend on signs to warn us of pending danger, don't we? I brought it with me a visual example of that today. I think it shows up on your screen there, but this is a sign that would find on an escalator at a shopping mall or at an airport. ...