In the style of many others who have used the subway map concept to understand a certain subject, I now present the Milky Way Transit Authority, a map of our own galaxy in the style of a subway map. I need lots of feedback so please be unstinting in your criticism.
Michael Frumin has a great blog, Frumination, chock full of information about public transportation, mainly the NYC Subway. There are graphs, maps, pictures, and much more, with lots of data and links to data. A few interesting posts: