10 Years of London Underground Ridership Data in One Map

Even the London Underground, one of the most widely used transit networks in the world, has seen something of a ridership boom in the past decade. The system now gives more than a billion rides a year, a figure nudged up in the latest data from 2012 with the help of the Olympics.

Scan over Transport for London's ridership stats over all this time, and you can watch some Tube stops swell in popularity, and whole neighborhoods seem to expand. Oliver O'Brien, a researcher at the University College London's Center for Advanced Spatial Analysis (and the developer behind an equally entrancing global bikeshare visualization), has just put all of these Tube stats online in an in-depth interactive map. From 2003-2012, you can visualize the annual entries and exits from each stop in the system, or break those numbers down by weekday or rush hour.