Haha, yeah. Entirely agreed. There is, within 15 miles of the continental United States, a Level 4 automated train, that has been running for over 30 years, w

Haha, yeah. Entirely agreed. There is, within 15 miles of the continental United States, a Level 4 automated train, that has been running for over 30 years, with 50 miles of track, and 300,000 passengers per day. And it works great. It's off-the-shelf technology backed by a moderately sizable 70-year-old company, so you can just go out and order a system like this yourself next year, if you want to (and you have a few billion dollars). That doesn't solve any of the self-driving car problems in the article, so it's totally a side point, but Level 4 trains are a solved problem, for over 30 years.