How the crowd moves: a typical day on the London Underground
TfL publishes a 'typical day' of passenger flow for every Tube station, in 15-minute slices. I pulled it for 269 stations and asked whether you can watch the crowd move. You can: the morning rush reaches the centre last, stations split cleanly into home and work, and on the Central line you can see a train fill up across east London and empty out in the City.