http://Carpooling.com it the #1 carpooling service in Europe with more than 3.5 Million registered users. There are about 170.000 rides per week with a total distance of 40.000.000 km.
This visualization shows a week in December 2011. Every colored dot represents the current position of a single lift at a specific time. At peak times (eg. Friday afternoon) more than ten thousand are active at the same time.
Read more on our website: http://www.ubilabs.net/projekt/carpoolingcom-visualisierung