Sydney Metro is a fully automated rapid transit system in Sydney, New South Wales, Australia. The first component, the Metro North West Line, opened on 26 May 2019, running between Tallawong and Chatswood. It currently consists of 13 stations and 36 km (22.4 mi) of twin tracks, mostly underground. Work is progressing to extend this line from Chatswood to Bankstown as part of the City & Southwest project, which will run under Sydney Harbour and the Sydney Central Business District (CBD), with a scheduled 2025 completion. When completed, the entire line from Tallawong to Bankstown will have 66 km (41.0 mi) of twin tracks and 31 stations.

Automatic train operation (ATO) is a method of operating trains automatically where the driver is not required or required for supervision at most. Alternatively, ATO can be defined as a subsystem within the automatic train control, which performs any or all of functions like programmed stopping, speed adjusting, door operation, and similar otherwise assigned to the train operator.