Incorrect. It's not "essentially impossible" as it's very far from a vacuum, or even a near-vacuum. The Hyperloop paper explains why it doesn't require high cos

Incorrect. It's not "essentially impossible" as it's very far from a vacuum, or even a near-vacuum. The Hyperloop paper explains why it doesn't require high cost to build the tube or maintain the vacuum within with only pumps at the two ends of the tube.