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I didn't realize the cars had drivers - I presumed they had long been replaced with self-driving.

Does anybody know why not? Surely the Tesla autopilot software is well capable (the routes are very simple after all). Some regulatory problem holding them back?

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It's a single track design with no fallback. If one of the vehicles has a malfunction with the software it's stuck there and blocks the entire tunnel. Not even staff can get past without climbing over the cars. They have to have a person in the car because if they didn't then it would be a safety disaster in the event of a fire.

My guess is simply no. No it’s not.

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