[pro-duct]

This sounds comically obvious, but WOW that was fast. Really impressed that they are delivering on some of their promises, given Musk's history of over-optimism. Sincerely wishing them the best of luck, because if they can pull this off, there will be other cities making deals with them (please San Francisco I'm begging you)

[jeltz]

They just used an off-the-shelf machine from another company. Modern tunnel boring machines are this fast.

[wyxuan]

they are doing San Jose for their grade separation project