Tennessee Governor Bill Lee says the Nashville tunnels will come at “zero cost” to taxpayers, and will instead be “entirely privately funded” by The Boring Company and its partners. Once completed, the “Tesla in tunnels” system will ferry people from the airport to downtown in around eight minutes.

Nearly a decade ago, the billionaire said he’d build a hyperloop. Since then, he’s mostly built tunnels for Teslas and his own employees.

The Boring Company, Elon Musk’s tunnel-digging company, and Tennessee Governor Bill Lee have announced a plan to build a 10-mile “loop” that will connect Nashville’s downtown and its convention center to the area’s airport.