This undated conceptual design rendering provided by SpaceX shows a Hyperloop passenger transport capsule, at a station ready to take on passengers. Three Southern California companies plan to build tracks to test how well the speed-of-sound transportation concept known as the "hyperloop" works in the real world.

This undated conceptual design rendering provided by SpaceX shows a Hyperloop passenger transport capsule, at a station ready to take on passengers. Three Southern California companies plan to build tracks to test how well the speed-of-sound transportation concept known as the “hyperloop” works in the real world.