Elon Musk’s Boring Company has finished excavating the second of two tunnels planned for the Las Vegas Convention Center’s underground loop transit system, according to The Verge. The city’s Convention Center (the LVCC) enlisted the company last year to develop the mile-long system, which could cost up to $52.5 million and is slated for completion in January 2021. It’ll be the Boring Company’s first foray into commercial transit.

The project — officially called the Convention Center Loop — will ferry people around underneath the venue via Tesla’s autonomous electric vehicles. It’s designed to move more than 4,000 people per hour across the facility, turning what is at least a 15-minute walk into a quick hop of less than two minutes. A future expansion linking the Strip, McCarran International Airport and Las Vegas Stadium is also on the cards, although a roadmap for that is yet to be announced.