Force Graph of most popular bike journeys (see vimeo.com/27435772 and wp.me/p12bXy-2v for more details); this visualisation uses geographical positions as initial conditions and allows the system to find equilibrium. Smaller edges are ignored; any route with fewer than 90 journeys (~1 per day) is not used.
Using geographical starting points allows a crude inspection of the effect of space on the clustering present in the network.
For more explanation, visit: wp.me/p12bXy-2v
Animation by Martin Zaltz Austwick (@sociablephysics), data cleaning by Ollie O'Brien (@oobr) of UCL-CASA.