The main problem with driverless cars is trolleys, if you read the more excitable tech press.
There’s something called the Trolley Problem and it goes like this: A runaway train is thundering down the tracks. Ahead of it, tied to the rails, are five people.
There’s also a lever and, as chance would happen, you’re standing right next to it. If you pull it, the tracks will switch to a section where a single poor, unfortunate soul lies, trussed up.
The question is, do you do nothing, and let five people die? Or pull the lever, and deliberately kill one person?
This moral dilemma dates back to the turn of the 20th century. Driverless cars have given it a shiny update.