Are cars gonna have bathrooms in them now? Because if not, you're now talking about rest areas, many of which are closed at night. And if I wake up having to

Are cars gonna have bathrooms in them now? Because if not, you're now talking about rest areas, many of which are closed at night. And if I wake up having to pee, and the nearest rest stop isn't for an hour, what then? I can't go back to sleep. The nice thing about a plane/train/coach is that the bathroom is right there -- no need to interrupt your travel. It's all kind of academic anyway because I don't own a car, nor does owning one here make sense anyway as I'd never use it except on road trips, so the plane/train/coach is the only option.