Take a look at this video:
I understand the principle behind how this video was created. A static camera was used, and thus by using temporal analysis you can get a static full-screen background. Against this background we also track and isolate all moving objects, and then finally we merge moving objects on top of the background to create a much shorter fluid shot that appears to be the intersection from hell.
I've seen similar software that can take a days worth of surveillance footage and condense it automatically, but of course now that I want to take a look at such a program I cannot find it. I understand that any such program that does it automatically will not be able to match the quality of the video linked above. Just consider the video an example of what I am looking for.
The question is, does any such software packages exists on the open market? Open source, closed source, free, non-free, doesn't really matter.