NORTH LAS VEGAS, NV - MAY 11:  Hyperloop tubes are displayed during the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020.  (Photo by David Becker/Getty Images,)

Hyperloop One

Hyperloop One, the Los Angeles-based start-up founded in 2014, aims to make Elon Musk's white paper on a super-fast mode of transportation a reality.