Now playing: Watch this: Elon Musk's Boring Company wants to build a 'weird little.
The Boring Company initially started off as a joke on Twitter while Musk was stuck in a traffic jam in Los Angeles.More news: 'Role model' Cristiano Ronaldo is still defiant
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The Boring Company produced a concept video for the service earlier this year which shows passengers entering an open-space concept on street level and being taken to an underground system of railways.
Musk also added that the top speed in the test tunnel would reach 250 km/h (155 mph) and that following the opening event there would be a whole day of free rides. It originates at a property owned by SpaceX, one of Musk's other ventures, and runs about two miles under city streets. Existing Chicago trains take about 40-45 minutes to travel that same route.
While Musk is known for his towering ambition and zealous breakthroughs, the tech billionaire also has a reputation for over promising on meeting benchmarks.
Dubbed "Elon time" critics of Musk have pointed to his history of missing deadlines or setting unrealistic timelines, most notably with the slow production of Tesla's mass market Model 3. Musk replied, "I think real".