One time, back when I had HA"s and they were not giving me a lot of benefit, I was pulled over for going 40 in a 30. I had no idea what the speed limit was, it was a 4 lane road. The police officer said something that I did not understand at first and then followed up with "from the look on your face, I can tell you didn't know". He asked me if I knew what the speed limit was on the road. The look on my face was because I didn't understand what he was saying :). I got off with a warning.