thats the way I am in my wrangler, most people will wave (well the raise a hand or tip the hat kinda thing) and if I see em in time I’ll wave too. usually the only ones who don’t wave out here are young ladies who’ve clearly not been told about the jeep wave and get this look of “why’s that creep waving at me?”
if everyone waits for the other guy to wave, no one’ll wave. and then we’d all just be silly and complain “those jerks, they never wave”
I’d wave when it’s safe, nod when it’s prudent, and if I’m in a situation where I can’t do either, chances are the other guy is too.