"Take a cycle, ride it where you like, then return it, ready for the next person. Available 24 hours a day, all year round. It's self-service and there's no booking. Just turn up and go." Barclays Cycle Hire is certainly popular in London. Every time a bike is been hired or returned the time and the location is recorded into the system.
Here is a simple visualization in processing, showing the starting and end point of each bike's journey per minute. Each yellow point, illustrates the starting point of the journey, while the dark blue points are the final destinations. The direction of the bikes is also animated, showing intentions of travel paths.