2006_05_subwaywaiting.jpggraphpaper has an informal look at the demographics of people on his morning subway commute, depending on the hour. Here are some of them:

3:00-4:00 AM
Drunks of all sorts, club kids, and winos. Late night workers, busboys, getting off their shifts. Only a handful of people per car. 6:1 male/female ratio.

9:00 AM - 10:00 AM
Early-career yuppies running a little late, creative industry workers, all sorts of professionals. 100% occupied. 1:1 male/female ratio.

10:00 AM - 11:00 AM
Hung over office workers, some seats available. 2:1 male/female ratio.

We pretty much agree, except one for thing: Between 7AM-9AM, there are school kids. Lots of them. This reminded us of a fun graphic from two years ago when the subway system turned 100 - the NY Times charted the crowds in a subway during the day.

Photograph of biker waiting for subway from umbo on Flickr