Allegedly, this video shows boarding time on a subway in Caracas. Is it typical? I don't know, but Jalopnik commenter rafaelgonz2099 thinks so:
As a guy who lives in Caracas, Venezuela I must say, that's just the tip of the iceberg. That same thing happens at almost all the subway stations we have in the city. This video shows the train that goes from a nearby suburb to the city itself.
Wherever these people are going must be awesome or wherever they're leaving must be terrible.