Waymo said it will offer “specially-trained Rider Support agents” during rides hailed by teens and loop in parents if needed.

Waymo has introduced an option for teen accounts, allowing young passengers to take rides in its driverless robotaxis without adult supervision. The program is only available in metropolitan Phoenix for now, but the company said it plans to offer the service in other cities down the line.

High schoolers are getting a healthy dose of newfound freedom—no adults (or humans) allowed—starting in Phoenix.