Can Tesla's Elon Musk revolutionize tunneling?

An image released by Tesla Motors, is a conceptual design rendering of the Hyperloop passenger transport capsule. If it were anyone else, the notion of digging hundreds of miles of tunnels to create a new subterranean transportation network under congested cities would seem like pure science fiction. But the dreamer behind this vision is Elon Musk, the billionaire innovator who has already shown with his Tesla electric cars and SpaceX rockets that he thinks big and doesn't wait for others to transform fantasy into reality. Once again, Musk is aiming to shake up an arcane industry not used to outside-the-box thinking and yet potentially ripe for disruption: the underground world of tunneling. He could use tunneling to achieve his moonshot goal of clearing up Los Angeles traffic.