Elon Musk's vision for transport is a 3D network of tunnels for autonomous electric vehicles

Billionaire entrepreneur Elon Musk's vision of an "entirely new system of transport," which he unveiled Wednesday night at a splashy event in Hawthorne, California, wasn't a reusable rocket like the ones he's building at his nearby SpaceX headquarters. Tonight, Musk showed off a 1.14-mile test tunnel — that snakes its way underneath 120th Street in the city of Hawthorne — that his other business, The Boring Company, dug for about $10 million using a modified boring machine called Godot. Musk estimates he's spent about $40 million of his own money funding The Boring Company.