If you've ever been stuck in traffic, you know turn signals are a vital part of safe driving (though not everyone seems to think so). But where did these nifty little blinking lights come from? Why didn't they come along until years after the invention of the automobile? Join Ben, Max and Noel as they explore the strange evolution of signaling, from the early days of on-the-road hand gestures all the way to modern, electronic turn signals.