Over on environmental blog WorldChanging, Jeremy Faludi calls for open-source public transit mapping services, on the basis that online mapping services are focused on driving directions rather than transit, and that transit services aren’t as useful or user-friendly, and lack the budget to do the job properly.

What people need is to be able to type in their start address and end address and have the website show them a map with directions, just like driving directions except for transit, with the route on the map showing where to pick up, where to get off, and where to walk between stations or destinations.

He and some of the commenters give some almost-there examples.