List of automated train systems

The list of automated train systems is ordered in descending order of the degree of automation. It uses the Grade of Automation classifications specified by the standard IEC 62290‐1. These are explained diagrammatically by the UITP.
This list focuses heavily on trains in the classical sense used for large-scale railways for passengers and freight but does include a few people mover systems.
History of metro train automation.
The first line to be operated with Automatic Train Operation (ATO) was London Underground's Victoria line, which opened in 1967, although a driver is present in the cabin. Many lines now operate using an ATO system, with the aim of improving the frequency of service. Since then, ATO technology has been developed to enable trains to operate even without a driver in a cab: either with an attendant roaming within the train, or with no staff on board. The first fully automated driverless mass-transit rail network is the Port Island Line in Kobe, Japan. The second in the world (and the first such driverless system in Europe) is the Lille Metro in northern France. 
Degrees of automation.
The list is ordered in descending order of the degree of automation. It uses the Grade of Automation classifications specified by the standard IEC 62290‐1. These are explained diagrammatically by the UITP.
Grade-of-Automation 4 (GoA4).
In this system, trains are capable of operating automatically at all times, including door closing, obstacle detection and emergency situations. On-board staff may be provided for other purposes, e.g. customer service, but are not required for safe operation. Controls are often provided to drive the train manually in the event of a computer failure.
Examples include the Paris Metro Line 14, Barcelona Metro line 9, Sydney Metro, and the Copenhagen Metro.
Grade-of-Automation 3 (GoA3).
In this system, trains run automatically from station to station but a staff member is always in the train, with responsibility for handling of emergency situations. In a GoA3 system, the train cannot operate safely without the staff member on board.
Examples include the Docklands Light Railway.
Grade-of-Automation 2 (GoA2).
In this system, trains run automatically from station to station but a driver is in the cab, with responsibility for door closing, obstacle detection on the track in front of the train and handling of emergency situations. As in a GoA3 system, the GoA2 train cannot operate safely without the staff member on board.
Examples include the London Underground Victoria line.
Grade-of-Automation 4 systems.
These systems are capable of unattended train operation (UTO), although some operators may choose to staff trains anyway.