You guys have better eyes than me. A bus going the opposite way on the interstate needs more than a POG sticker for me to recognize.
So here is my suggestion............Since most of us have those roof mounted Satellites of domes, I suggest we paint them some distinctive color like this so we could identify another POG member.
Just to head off any debate, that color is not volunteer orange or Ohio State (oops, I meant OSU the other Ohio state) color. It is just plain orange, although a bright yellow, or fluorescent green would work just as well.