Information on metro systems
UrbanRail.net
The site for metro systems worldwide. Truly comprehensive site with details on metro systems the world around.
www.nycsubway.org
Photo surveys and information about many of the world's subways.
Subways/Transport
Links to large assortment of worldwide metro information.
Information on public and alternative transit
Canadian Urban Transit Association (CUTA)
A Canadian public transit lobby group.
carfree.com
All about designing car-free cities.