Driving home after taking Millie to work a few minutes ago, I was sitting at a stop light and saw one of the lanes ahead closed by traffic cones. There was a sign that said:
And I thought, as I'm sure you did, "Ah, the slow-down machine! THAT'S why things proceed at such a leisurely pace around here."
Couple of months ago I saw one similar. It said
You can guess what I mentally did with that one.