Responding to comments on Twitter, Musk said there would be an opening event that night and “free rides for the public next day.”
Musk’s venture, The Boring Company, has been pushing the underground system as a futuristic concept that could radically speed transport within and between cities.
In another tweeted response, Musk said the test tunnel has a top speed of 250km/h.
A hyperloop is a shuttle that travels on magnetic rails, somewhat like a train, but which runs in a tube with little or no air. In theory, hyperloops could allow travel faster than the speed of sound.