Not sure about other places.
But in georgia, they have something called "implied consent". If you get a drivers license, one of the caveats is that by accepting the license, you give implied consent for a breathalizer test in case of a dui stop and you also give implied consent to be video recorded in any traffic stop.
"When it crosses my mind to do something, I don't ask why, I ask why not. And usually there's no reason not to, so I just go ahead. It's given me the strangest collection of hats"