Idea: Fedex has a hub in Memphis where 100s of planes land a night and travel to their destination with packages at 500 miles a hour. Imagine this hub and airplanes being replaced by these tubes that travel at 4,000 miles an hour. The express package delivery market. Reduce air travel traffic and CO2 emissions.
A massive vacuum tube — mounted either above ground or even under water — would be combined with a magnetic levitation system used on conventional bullet trains. That means no friction, no wind resistance, no chance of collisions, and insanely high speeds. -- Musk described the Hyperloop as "a cross between a Concorde, a railgun and an air hockey table," at AllThingsD's D11 conference earlier this year. And in an interview with PandoDaily, Musk said the Hyperloop could form a fifth tent pole of modern transportation, joining cars, planes, trains, and boats, adding that because of its low energy usage and ability to get juice from solar power, it could generate more power than it would consume. -- ET3, a company based in Longmont, Colorado, is working on a Evacuated Tube Transport (ETT) system, which it describes as "space travel on Earth." It uses two tubes — one for each direction — with 400-pound, passenger car-sized capsules that could house six people, each accelerated by linear electric motors. According to ET3, state trips would average speeds of around 370 mph, while international trips would hit that insane 4,000 mph mark.