(Part of Open Source Transport Informatics tools listing, for the OSSTIP project, especially OSSTIP/WP2- Transit Informatics tools review.)

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.

External links

• http://graphserver.github.com/graphserver - project homepage
• https://groups.google.com/forum/#!forum/graphserver - Google group, including some example uses
• Regarding Walk Score usage:
  • Jarrett Walker discusses the use of Graphserver in Walkscore.com's Transit Maps
  • http://blog.walkscore.com/2009/03/transit-and-real-estate/
  • Walkscore.com "technology preview" using Graphserver in their archive