In the animation (see below) the least travelled routes begin to fade out after about 15 seconds – “like a graphic equaliser,” says collaborator Andrew Huddart, also at City University. Around the 1-minute mark, structure emerges from the chaos and three major systems become clear: routes around, and through, the lozenge-shaped Hyde Park in the west, and commutes in and out of King’s Cross St Pancras in the north and between Waterloo and the City in the east.
In the animation, the curve of a route indicates the most frequent direction of travel: trajectories leave a station in a straight line and then hook into their destination. We can see that more people cycle to King’s Cross, for example, than from it. Similarly, more people cycle from Waterloo – typically to destinations around the City – than towards it. It’s not yet clear why this is, says Huddart. (via Short Sharp Science: Tron-like map of bike journeys reveals London’s hubs)