According to
this article there is one second of CG to join two sections.
The 606 takes doesn't make sense to me. It was filmed over 4 days, that would mean one take every 9.5 minutes. Doesn't that seem way too fast for such a complex set-up?
Also, it would have been much cooler if the car at the end ran into a cog on a board.
For film geeks, the movie Russian Ark is one continuous 96-minute shot. The trailer is
here.
Adam