[b_ttercup]

I recall reading the plan was to make electric sleds for cars (vaguely akin to car wash tracks) rather than hyper loops.

[hanklazard]

Correct. Here's a clip with a nice visual aid for what he's talking about: https://youtu.be/hpDHwfXbpfg?t=1m18s

[tyingq]

Perhaps. That's not what's said in the first two paragraphs of the article though.

"That superfast train, known as the hyperloop"

Edit: Ah, perhaps the article structure is just confusing to me. It's hard to map which "Tunnel Plan" they mean in the article.

[edraferi]

That would be awesome, especially if you can keep the engine running for climate control, etc.