Even today there are driverless vehicles on public streets. Not many, but more than last year. E.g., Tesla’s “Smart Summon [sic]” feature is supposed to fetch y

Even today there are driverless vehicles on public streets. Not many, but more than last year. E.g., Tesla’s “Smart Summon [sic]” feature is supposed to fetch your car for you. So no, there isn’t always someone in the car. The linked thread doesn’t mention humans one way or the other; it’s all about the cars. It’s reasonable — obvious, even — to assume that all driverless cars are the context, not just human-occupied ones.