And if it could be done using OpenStreetMap. Here in Germany the local transportation body has information regarding BUS / Tram / Trains available easily through an android or iOS app and uses OSM to display them.
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Bibek Shrestha
bibekshrestha at gmail dot com
Twitter:
http://twitter.com/bibstha"You mustn't be afraid to dream a little bigger, darling.", Eames to Arthur, Inception 2010