The initial theme of this thread is self driving cars,, Though I doubt it will ever happen.
In todays news a driver slavishly following his GPS turned up a trainline. Silly but happens far too often. Self driving cars will rely totally on GPS, any computer 'brain' in the car will still be controlled by GPS. Topography however changes by the hour, roadworks, simple accidents [ roads are often closed for hours for many reasons] inclement conditions, making any real time upgrades near impossible. So either the car crashes, or more likely just grinds to a halt as it is effectivly lost. Which in turns cauuses chaos with all the other self drivers. The human brain is often very flawed but its ability [normally] to think for itself at least resolves the majority of these issues.
Watching air disaster shows on TV also scares me, planes get lost, planes do all sorts of silly things because of the computers, though the pilots often have a real problem deciphering the problem and or then taking control. And airspace has about one millionth of the traffic per km.
As for public transport? How many of you have met or ridden with bus drivers? Or almost worse cab drivers. Most scare the hell out of me. How they get a drivers liscence often defies any logic. And the number of them involved in accidents is very high.