Polite and intelligent drivers do exist, and when we encounter them, doesn't it just brighten your whole mood? This morning, as I approached a left-turn at a four-way stop, the driver behind me stayed well behind me in anticipation of my move. I looked back, and signaled. In a nice response, the driver blinked his/her headlights. Aww! Such a little thing, but it made me smile. I wish there was a universal hand signal for "Thank you!", because I wanted to reinforce this good behavior. Anyone know one?