OpenStreetMap contributor, Ed Hillsman, was the senior research
associate on a multi-modal trip planner study. In it the authors
implement a multi-modal trip planner using transit feeds,
OpenStreetMap data and a variety of Open Source tools. Join me in
reading this weighty tome. My quick first glance suggests that it
will be well worth reading the full report.
It is definitely a good read, I would encourage OSM contributors and transit agencies alike to take the time to go over the report.