Musk recently started a new project named The Boring Company, which will hopefully, solve the problem of traffic in LA, and possibly later in other cities. Elon's idea is to build tunnels underneath the city which would allow you to skip the traffic and get from point A to point B much faster.
At a recent TED conference in Vancouver, Musk showed a video of his futuristic underground transportation tunnels. The video shows a Tesla car getting on a platform called a car skate which then lowers into the underground tunnel. The car then travels at a speed of up to 130 mph (around 210 km/h) in a single vehicle lane. Other cars can also be seen traveling through the tunnel in the same and opposite direction.
Although Musk said that he's treating The Boring Company as a side project, the company is progressing, and Musk has revealed the first working car elevator which should lower the cars into underground tunnels.
Musk also recently announced that he got a verbal government approval to build an underground Hyperloop which will connect New York and Washington D.C. The proposed route would include stops in Philadelphia and Baltimore, while the entire trip from New York to Washington DC would take 29 minutes.