We have had self driving vehicles for a long time - they're called busses, taxis and trains, and can take many people at once who don't need to drive or own the transport. We're just automating that last one human who needs to hold the wheel of the bus/taxi/train and extending the reach of the network.

I'm a little bit worried about self driving cars being used for auto-detaining people and delivering them to police/terrorists. When you get into a sdc, you lose your ability to get off anywhere you want, it might lock up the doors and deliver you to the mafia or police for all you know.

Remember "auto-detention" I invented it here and now. :-)