In my decades of driving (and riding), I've never had a collision. So for me, it would eliminate 0 car crashes. (Funny how most of the careful drivers never do, and reckless drivers frequently do.) You could also eliminate a significant percentage of accidents if you put breathalyzers on all car ignitions, but is it politically feasible to do? That's the question.

"reducing stress"

I for one do not think that it would be less stressful being inside a car outside of my own control. Most psychologists seem to say that being happy is directly related to being in control yourself. Are automobile passengers notably less stressed than drivers? Even when it's convenient, people tend to avoid carpooling. I certainly don't see people ever choosing to be passengers, when they are capable of driving.

In 1971, total number of dead people by traffic accident in South Korea was 26. The number of death increased up to 10,000+ in 1991. Four hundred times more death than 40 years ago.

A country that only allows cars on highway become the number one country of traffic accident in the world. How can it be? South Korea is worst place of driving out of 40 OECD countries for years.

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Sure, for the vast, empty distances of the middle of the USA, a self-driving vehicle would do just fine. But if you've ever come to the UK and seen our incredibly complicated road network – especially the roads in our cities who's street plans are over 2000 years old – and there's not a snowball's chance in hell that modern AI could navigate our roads safely.

Although I think that 'self directed' vehicles will eventually be banned on public roads in 15-20 years I think there will still be a space for riders to use racetracks, national parks and deserts.

We still use horses 100 years after no longer needing them, surely we will still be riding 100 years from now?
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