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

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 would work perfectly within the tunnel, it wouldn’t need a track. If there was elevators on both ends, then multiple Tesla’s could go in and be queued at the destination end for the elevator back to surface. It wouldn’t be 12 minutes but it’d still be way faster than rush hour. The electric skate version of the tunnel I think is the idealized version.