It would be interesting to see what will happen if the times of the trains are moved to random other times within the hour. In might well be that short transfer times is just statistical consequence of having many scheduled trains. There are probably some trains that are intentionally synchronized, but I don't think there's too many of them, because synchronizing all trains is simply impossible. For instance if you h…
Author here: it would be a good point of comparison, to generate a random network and look at the same statistics. I will do this maybe in a future article.
Just to clarify, not another network, just shift all trains by a random number of minutes.