Latin American election and demographic maps

[homelycooking]

Seems like the level of NBI is very dependent on the quality of transportation infrastructure. I've perused at some highway maps of Colombia and it looks like whole departments are inaccessible by good roads. Is that the case? I wonder about the connectivity and cohesiveness (transportation, communication, culture) of a vast country so enormously riven by geography.

I'm not sure what is meant by "critical overcrowding". Is that just a measure of population density? That dimension doesn't seem to have much of an effect on the overall NBI.