Driverless/autonomous cars are a whole 'nother kettle of fish. Despite the hype they're a very long way from being a thing and quite a few of the start up companies have already jacked it in as being too difficult from a safety perspective. There is the odd, very small, trial going on in a couple of places but everywhere else the vehicles have a 'safety driver' and often an engineer in them as well.
They would work fine if there were no other human drivers on the same road. The problem is human drivers behaving in unexpected ways (doing stupid things) and poor road maintenance. Fix those and autonomous automobiles are ready to go.