Earlier quoted context omitted.
If we had autonomous planes it wouldn't significantly reduce cost or increase usage. But there is a lot of investment in autonomous drones. Planes also have a very high safety bar to begin with, which cars do not. Same thing about trains, there's very little value in doing so, and resistance in the form of unions in some locations. Some trains are fully automated though, here's an article with some more info: https:/…
With software, it's always easy to make something appear to work. All the corner cases make something take 10-100x longer than the functional prototype. This became painfully obvious with the article floating around where a car misread a stop sign with a small amount of marking as a 45MPH speed limit sign. It's pretty clear that if a car is mistaking a red sign for a white sign, we have a very long time to go before…
a) Humans can be fooled by vandalising a stop sign too. The difference here is that the change is imperceptible to humans... but does this matter?
b) A lot of self-driving work leans heavily on maps which will know to expect a stop sign.