The first system to use this class of driverless electric multiple units was the Copenhagen Metro which was opened in 2002.

The trains used on the Princess Nora bint Abdul Rahman University system are 2-car units.

Trains are fully compatible with platform screen doors, which are found at all stations in Brescia, Rome and Milan, Copenhagen, Honolulu, and Thessaloniki.

The ATP is responsible for managing the trains' speed, ensuring that doors are closed before departure and that switches are correctly set.

Although the trains are not equipped with drivers, there can be stewards that help passengers, perform ticket controls and assist in emergency situations.

[11][12] The Copenhagen Metro, Denmark, consists of four lines, M1, M2, M3 and M4 that run 38.2 kilometers (23.7 mi) serving 37 stations.

The first lines connects the city center to the areas of Frederiksberg and Amager, and Copenhagen Airport.

Metroselskabet took delivery of 34 three-car units between 2002 and 2007, and operates with a headway of between two and twenty minutes, including an all-night service.

[16] The Milan Metro's Line 5 first section between Bignami and the interconnection with M3 at Zara opened on 10 February 2013.

[18][19] Milan Metro's fourth line is currently under construction and will run from Linate Airport to San Cristoforo.

[20] The first section, running from Linate to Dateo, opened on 26 November 2022, while the completion of the line is expected to be in 2024.

[21] An 11·5 km metro serving the Princess Nora Bint Abdulrahman University on the outskirts of Riyadh opened in 2012.

Metropolitana di Roma has ordered thirty six-car units, which are 20 centimeters (7.9 in) wider than the other systems' vehicles, and capable of carrying 1,200 passengers per train.

[6] 18 driverless Hitachi Rail Italy (AnsaldoBreda) units are currently operating on line 1 with 15 more coming with the opening of the Kalamaria extension.