Let's say you're driving around in unfamiliar territory and you're having trouble managing all of the traffic. Someone is nice enough to let you in their lane, but how do you say thank you? I wave, but I also have tinted windows, so they might not see it. Here's what drivers in Japan do. It's probably something I'll adopt for myself, too.

They burst their hazards for a couple of clicks.

Just a simple couple of flashes of their hazard lights, as if it were saying thank you is all they do. I like it!

Perhaps it's something we should do here, too.