The Tube handles up to 5 million passenger journeys per day. At peak times, there are more than 543 trains whizzing around the Capital.
London Underground became part of TfL in 2003 - by 2010 we had full responsibility.
We're in charge of all aspects of the Tube's operations including:
We are also responsible for the maintenance and renewal of most of the infrastructure used by the Tube, although some services run over track that is the responsibility of Network Rail.
More people than ever are using the Tube, with more trains running than at any time in its history.
A multi-billion pound programme we are carrying out will increase capacity and accessibility and help us to run services more reliably and more frequently.
It includes introducing new trains, signalling and track, and rebuilding some of the busiest and most complex stations.
Learn more about our work to improve the Tube.