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Tesla braces for its first trial involving Autopilot fatality
(www.reuters.com)
This is a most excellent place for technology news and articles.
It seems like an obvious flaw that's pretty simple to explain. Car is learnt to operate the infromation about collisions on a set height. The opening between the wheels of a truck's trailer thus could be treated by it as a free space. It's a rare situation, but if it's confirmed and reproduceable, that, at least, raises concerns, how many other glitches would drivers learn by surprise.
In most countries trucks have bars between the trailer wheels, precisely because too many car drivers got an unwelcome haircut by not paying attention.