Anyone who knows me can confirm that I am a nervous pedestrian; they have the fingerprint-shaped bruises on their upper arms to prove it. I'm of the opinion that crossing on the red man is not just fool-hardy, it's likely to put your blood pressure up to a point where ultimately it will shave years off your life (if you make it to the other side without being flattened first). Naturally, I appreciate anything that makes a pedestrian's life easier. So I was surprised to read