I've trying to specify the "body" language we use while stuck in traffic. I'm hoping for a word ending in -al.
At work we use professional body language, at home we use social body language, while stuck in traffic we use _______ body language.
At first I thought "automotive" or "vehicular." I think this conveys a sense of being in a car, but without the context of being on the road with other cars, jostling for position. To convey the interactive component, I thought maybe "vehiculo-social" but it's a bit contrived, and still leaves out that we are moving slowly on a crowded road rather than zipping down the freeway doing 80mph. "Traffical" just sounds silly.
So is there a word for this? Am I stuck with "vehicular"?