A small piece of tape was all it took for a Tesla self-driving program to misread a speed limit sign and think it should be going 85 mph instead of 35 mph.

Crucial bits of data were omitted from a corpus used to train self-driving car models. The work in progress offers some insight into how AI technology is being developed.

A "discussion draft" would prohibit automakers from selling self-driving cars unless they develop, maintain, and execute "cybersecurity practices and processes to minimize cybersecurity risks to motor vehicle safety."