OSMTransport
From OpenStreetMap Wiki
OSMTransport is a web site showing the public transportation systems in many locations worldwide. You can find it here : http://3liz.fr/public/osmtransport/
It is developped by the French Open GIS solutions company 3Liz (team: René-Luc d'Hont, Nicolas Bozon, Michael Douchin).
The data is updated approximately every two days and coverage is worldwide.
COMPARE: http://openmap.lt (other great transport views) and the interactive http://TapTapMap.org for Haiti, increasingly documented for all to contribute!