I admit that I've been out of the loop for a couple of decades. But, during the last couple of months since I've been back up on two wheels, I've noticed something I'd like to ask about. Most of the time when I meet another bike (or bikes) going the opposite direction on the highway, I get a one fingered gesture. No...not that one! It's like they point (forefinger) at the center divider. Like they wanna make sure I know where it is or something. My assumption is that it is an acknowledgment of some sort. Now, this may be a regional thing, but can anyone enlighten me?