The London metropolitan area is the largest in the EU with a population of 13,614,409 I felt like making a visualization of the daily cycle of the city. Unfortunately the frame rates and resolutions available mean its still very crude. The Journey information is approximately correct but at a scale of 1 pixel = 4 Journeys. Each day is compressed into 3 seconds each with with a set of Journeys divided into morning journeys (predominantly ingress) and PM journeys (generally people going home). because of compressing the whole days travel into such a short number of frames the temporal spacing of journeys is distorted however the speed of travel of each passenger is to scale. The visualization was programmed in Perl in a day or two and consumes data derived from the TFL oyster card usage data feeds and so is "Powered by TfL Open Data". I hope you Enjoy it.
Music: krishnaji's request by Gorowski