The Wave

I've only encountered this in Lincoln County, Kansas. Perhaps it exists elsewhere, but for me, it indicates that I'm in my ancestral home. If you want to bring a little north-central Kansas to your roadways, here are instructions for The Wave.

1. While driving on a two-lane road, rest one hand at 12:00 on the wheel.
2. As a vehicle approaches from the other direction, raise one or two fingers as you are close enough to see the other driver's face.
3. Return fingers to rest position as soon as the other vehicle passes.
4. Do not smile.
5. Repeat as often as necessary.