Stuck in notoriously bad Los Angeles traffic in December last year, Elon Musk tweeted that it was time to start digging tunnels under the city. What began as a joke, is now becoming a serious plan. Musk even has a name for his new tunnel company: Boring. Musk is a big fan of tunnels and even prefers them over flying cars. “Car tunnels can alleviate congestion completely. You would not need a flying car. And it would always work, even if the weather is bad. It would never ice up, and it would never fall on your head.”