In another blog post I was mentioning a public API to get coordinates of taxi cars in Bucharest (only the cars that run a specific taxi mobile app)
Since I am planning to learn Processing, I made a timelapse of the taxi cars movement on a Saturday night. Here it is:
About 10 real seconds in a frame, 30 FPS.
So a video second represents about 5 minutes of real time.
UPDATE: More timelapses:
Same night, but zoomed out to cover the entire city:
With some color (the taxi companies are color-coded):
The Processing sketch files can be found on my Github repository.