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Underground and DLR

Opened in 1863, the London Underground, commonly referred to as the Tube or just the Underground, is the oldest and third longest metro system in the world. The system serves 272 stations, and was formed from several private companies, including the world's first underground electric line, the City and South London Railway, which opened in 1890.

Over four million journeys are made every day on the Underground network, over 1 billion each year. An investment programme is attempting to reduce congestion and improve reliability, including £6.5 billion (€7.7 billion) spent before the 2012 Summer Olympics. The Docklands Light Railway (DLR), which opened in 1987, is a second, more local metro system using smaller and lighter tram-type vehicles that serve the Docklands, Greenwich and Lewisham.