Open Source Routing Machine

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Open Source Routing Machine
Authors: Dennis Luxen, Mapbox
License: BSD
Platforms: Linux, macOS, and FreeBSD
Language: English
Source code:
Programming language: C++

High-performance routing and map-matching server


The Open Source Routing Machine (OSRM) is an open-source router designed for use with data from the OpenStreetMap project.


In contrast to most routing servers, OSRM does not use an A* variant to compute the shortest path, but instead uses contraction hierarchies or multilevel Dijkstra's. This results in very fast query times, usually below 1 millisecond for data sets like Europe, making OSRM a good candidate for responsive, web-based routing applications and websites.

Besides chronological routing, OSRM also provides additional functionality, such as map matching, traveling salesman problem solving, and generating vector tiles that contain routing metadata.

Services and applications powered by OSRM

See the full list of websites and projects using OSRM.


The OSRM project began with an initial public release on July 9, 2010, by Dennis Luxen.[2] The next year, Luxen presented on OSRM at the ACM GIS '11 conference along with Christian Vetter.[3] In 2015, Luxen stepped back from leading active development on OSRM.[4] Mapbox's Directions team continues to maintain and contribute to the project. In early 2018, Mapbox hired the developers of the Valhalla routing engine[5] which previously developed by Mapzen, and stopped its work on OSRM [6]. After a period of development being nearly stalled, work on the project is slowly continued by new maintainers[7][8].

See also


  1. “Biking Directions With OSRM’s New External Data Support”. 2013-10-22. Retrieved 2015-03-04. 
  2. Luxen, Dennis (July 9, 2010). “Announcing the immediate availability of the Open Source Routing Machine”. OSM-dev mailing list. Retrieved July 4, 2017. 
  3. Luxen, Dennis; Vetter, Christian (November 1–4, 2011). “Real-time routing with OpenStreetMap data”. Proceedings of the 19th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems. Chicago, Illinois: Association for Computing Machinery. pp. 513–516. ISBN 978-1-4503-1031-4. 
  4. Luxen, Dennis (April 7, 2015). “Taking a break ...”. OSRM-talk mailing list. Retrieved July 4, 2017. 
  5. Gundersen, Eric (January 5, 2018). “Mapbox ❤️ Valhalla”. Mapbox Blog. Retrieved August 27, 2021. 
  6. Zverev, Ilya (2019). “Ничей OSRM”. Retrieved August 27, 2021. 
  7. Doctor_Fegg (April 4, 2020). “PSA: Open Source Routing Machine (OSRM) was largely abandoned by its maintainers”. HackerNews. Retrieved August 27, 2021. 
  8. “Project status?”. OSRM GitHub issues. Retrieved August 27, 2021. 

External links