subway-street maps

Why is it so hard to find subway-street maps?

i.e. a cross between

and


You used to be able to buy such maps of Central London from vending machines in tube stations, for 1 pound.


http://www.mvv-muenchen.de/de/mvv-info-service/plaene/netzplaene/index.html

What about http://www.mvv-muenchen.de/web4archiv/objects/download/1/schnellbahnnetz_051211.pdf ? (I can't see PDFs from here)

football(soccer) found the most exciting sport

via MR
<A HREF="http://www.newscientist.com/article.ns?id=dn8531 football(soccer) found the most exciting sport</A>