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Hyperloop is thus an incorrect — indeed, a highly misleading — term for the means for rapidly transporting people enclosed in pods inside a very low-pressure and overwhelmingly straight metallic tube.

We have no idea what we’re doing,” declared Elon Musk, standing beside a yawning “test trench” in Southern California in 2017. A crowd of engineering students and tech reporters hooted and hollered, ...

Two centuries after George Medhurst first imagined moving people through vacuum tubes, India is proving that sometimes, the future takes longer to arrive than the hype suggests—but when it does, it’s ...