Dear Diego,
thanks for the link. I did not remember that post. It is good to see that you get a nearly identical distribution of times of crashes as this data set gets. An interesting question would be: what are the differences, e.g. most accidents happen at crossings, but are the statistically significant differences between NYC and Atlanta in terms of where accidents happen.
It is obvious from your post, and also what we would expect, that larger crossings with more people passing have a higher accident rate. I thought about combining this with TravelDirections, similar to Bernat’s post or Sander’s . One would have to look at paths between any (or as many as possible) pairs of points and see which roads/crossings are taken most frequently. Of course, observed/measured traffic flow data might even be better.
Thanks,
Marco
PS: Are you aware of any other cities in the US that have similar data sets?