Autonomous car specialist Waymo has said it's expanding its robotaxi service in Los Angeles less than a year after launching there.

Waymo on Tuesday opened its robotaxi service to anyone who wants a ride around Los Angeles, marking another milestone in the evolution of self-driving car technology since the company began as a secret project at Google 15 years ago.

Waymo One, the driverless ride-hailing app, is now fully available to much of greater Los Angeles after the robotaxi service previously started offering rides in LA to a limited number of people on a waiting list.