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Started in 2004 by MIT Researcher Bradley Martin-Anderson, GraphServer is an Open Source multi-modal public transport trip router, written in Python.
One of the uses of GraphServer was providing the back-end computations as part of the Transit Time Maps visual application on the Walk Score website.
Much of the core capability of Graphserver was also ported into the OpenTripPlanner tool.
- http://graphserver.github.com/graphserver - project homepage
- https://groups.google.com/forum/#!forum/graphserver - Google group, including some example uses
- Regarding Walk Score usage: