I disagree. His original vision for these types of projects was an elevator from surface to tunnel for a vehicle(likely a Tesla). So with that in mind as kind of a barebones version, even if he was to build a 17 mile tunnel that was effectively a walkway I would consider that a success. But a 17 mile tunnel that can accommodate autonomous Tesla 3, just as an extreme example, that’d also be a success. The autonomy wou…
Sounds like it would scale horribly compared to actual mass transit, though. The amount of space taken up per passenger would be huge if you use cars.