Tag: #UndergroundTunnelMaps

  Trans-Planetary Subway Systems “Describes a subway concept called “Planetran” comprising electromagnetically supported and propelled cars traveling in underground evacuated tubes, able to cross the United States in one hour.”…

  The Very High Speed Transit System Related Topics: Surface Transportation, Transportation Technology “Description of a very high speed transit (VHST) system operating in its own rarefied atmosphere in evacuated…