[stale2002]

Self driving trucks on the highway are already legal in some states. EX: Arizona.

Yeah, city driving is hard. That might be a long ways away. But highway driving? Thats easy. You can even buy a highway driving, consumer self driving vehicle right NOW. Tesla sells them.

[kstoneman]

Self-driving is not the same as autonomous, though. There is always a human present, and sometimes that's not enough to make up for the fact that a Tesla apparently can't "see" a 75 foot long, 13 1/2 foot high truck in front of it while driving down the highway.

And while highway driving generally has fewer decision points per mile than city driving, the speeds are much higher and so the effects of errors are much greater on the highway. The worst wrecks I've seen have all been on the highway, not in cities.