The Copenhagen Metro is a rapid transit system serving the city of Copenhagen, Denmark. It began operations in 2002 and has since expanded to include four lines, connecting various neighborhoods and key locations, including the city center and Copenhagen Airport. The system is known for its efficiency, modern design, and driverless trains. The metro operates on an automated system, allowing for frequent service and quick travel times. It features 39 stations, many of which are underground, and is integrated with other public transport options like buses and trains. The Copenhagen Metro is a vital part of the city's public transportation network.