One of the problems I’ve read about driverless cars recently is merging into traffic...interpreting when another driver is signalling to let them in. And other cars rear-ending them because they don’t complete the merge when the human driver expects them to...the robot car is being too cautious.
All these are bugs that will eventually be worked out though. Human drivers don’t have a perfect safety record either, so the standard probably won’t be 100% perfection.
Driverless semis and every other idiot on the road texting while driving. What could possibly go wrong?