As you’re driving along a busy road, assuming you’re not overly aggressive, there is a lot of give and take with other vehicles. Sometimes you’re letting them in, sometimes they’re letting you in. Wouldn’t it be nice if there was a conventional way to signal, “Hey, thanks, friend!” that was a little bit more visible (and common) than a wave?

In Japan there is…

(via Digg)

Now… How do we get this trend started here in the states?