There are in my knowledge at least 2 metro lines in europe entirely automated. Line 14 in Paris, France and M2 Metro in Lausanne, Switzerland. There are probably a lot more that I have never heard of. But these metro lines are singletracks, without any road crossing and stations are made so that nobody can end up on the lines. I guess the hardest part is introduces safety features that would deal with unexpected parameters.

Well there wouldn't be any lawsuit. It's up to redhat, suse, debian or ubuntu to deliver secure distros, not Linus Torvalds. Replace with mobile vendors when it comes to mobiles.

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