The Boring Company will attempt to build a high-speed, and still theoretical, hyperloop in the coming years, according to Musk.

The idea of a transport system that could send passengers and cargo through a low-pressure tube at 700 miles per hour was outlined in a white paper by Musk. He didn't take on the project. Musk encouraged others to develop the concept by sharing basic engineering plans. Several companies and researchers have been working on hyperloop for nearly a decade, but there is not a working example of the system in the world.

The Boring Company was founded by Musk in December 2016 to find ways to dig tunnels for cars and high-speed trains that would end traffic congestion. The Boring Company has contracts with some cities, but not hyperloop or high-speed transport. It is the most mature project in Las Vegas, and it uses cars from the electric car company,Tesla, to shuttle people through underground tunnels. The company received initial approval for a special use permit and franchise agreement that will allow the Boring Company to expand its Vegas loop system to a 29-mile route with 51 stations that will include stops at casinos along the Las Vegas Strip, the city's football stadium and UNLV. It would reach the airport eventually.

Less than a week after The Boring Company raised $675 million in a Series C funding round that pushed its valuation to $5.7 billion, Musk responded to a list of cities with the worst traffic in the world.

Cities with the worst traffic in the world:

1. London 🇬🇧

2. Paris 🇫🇷

3. Brussels 🇧🇪

4. Moscow 🇷🇺

5. New York City 🇺🇸

6. Chicago 🇺🇸

7. Rome 🇮🇹

8. Bogota 🇨🇴

9. Palermo 🇮🇹

10. Istanbul 🇹🇷