I-75 Highway Underground Very High Speed Hyperloop

"Description of a very high speed transit (VHST) system operating in its own rarefied atmosphere in evacuated tubes in underground tunnels. Most cases considered took less time to go coast-to-coast (e.g., 21 min) than it takes an aircraft to climb to an efficient operating altitude. VHST's tubecraft ride on, and are driven by, electromagnetic (EM) waves. In accelerating, it employs the energy of the surrounding EM field; in decelerating, it returns most of this energy to the system. Tunnel systems would be shared by oil, water, and gas pipelines; channels for laser and microwave waveguides; electric power lines including superconducting ones; and freight systems. Environmental and economic benefits are substantial, and the technology for building and operating the system exists."
https://www.rand.org/pubs/papers/P4874.html

"The Hyperloop is one of Tesla CEO Elon Musk’s many ambitious endeavors. Like a futuristic maglev train, the transportation system would shuttle freight and people quickly over long distances. In addition to installing Hyperloop routes for statewide travel, Musk thinks it would also be useful on Mars."
https://www.motorbiscuit.com/elon-musk-hyperloop-challenged-richard-branson-virgin-hyperloop/

"The network traverses the entire planet with tunnels connected with national highways. In between the the bases theyn are linked with super fast Magnetic Levitating Trains (MAGLEVS), capable of speed up to 17,000 mph that connect to all facilities & DUMBS throughout the world."
https://intothestorm.info/dumbs-deep-underground-military-bases/