For Elon Musk’s very difficult year, there’s a light at the end of the tunnel.

Specifically, it’s a 1.14-mile tunnel the inventor and beleaguered CEO of Tesla Motors says is a first step in solving “soul-destroying” urban traffic. In 2016, Musk — already busy running two high-profile companies — founded a construction firm called the Boring Company to tackle gridlock by drilling underground. Some thought it was a joke. Two years of big promises and $40 million later, his just-in-time innovation machine delivered a functioning test tunnel late Tuesday.

What’s it like to ride through Elon’s tunnel? Bumpy, but that’s all part of the ride on a Musk enterprise.