I was watching this video of a live chicken trapped on a moving truck and thought it was strange that it's not possible to say anything to them even when circumstances might warrant it. All we got is honking and waving. There could be a touchscreen interface with a map of nearby vehicles. It could be voice controllable or the passenger could do it for safety.
Because they're fucking everywhere, something like 90% of the US population lives within 10 miles of one.
It's basically shorthand for "this is a common and readily available thing that you can acquire anywhere in the country for cheap even if megacorps have driven all of the local specialty retailers out of business in your areas"
As opposed to something like a HF ham radio which is a specialty item that no big retailers like walmart, to the best of my knowledge, carry, and so you're probably not going to be able to find it locally.