https://www.transitwiki.org/TransitWiki/index.php?title=Rrrr&feed=atom&action=historyRrrr - Revision history2024-03-29T08:14:53ZRevision history for this page on the wikiMediaWiki 1.35.1https://www.transitwiki.org/TransitWiki/index.php?title=Rrrr&diff=2832&oldid=prevSkinkie at 01:46, 4 February 20162016-02-04T01:46:43Z<p></p>
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</table>Skinkiehttps://www.transitwiki.org/TransitWiki/index.php?title=Rrrr&diff=2831&oldid=prevSkinkie at 01:45, 4 February 20162016-02-04T01:45:17Z<p></p>
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</table>Skinkiehttps://www.transitwiki.org/TransitWiki/index.php?title=Rrrr&diff=2827&oldid=prevSkinkie: Bliksem Router initial page2016-02-03T22:22:32Z<p>Bliksem Router initial page</p>
<p><b>New page</b></p><div>RRRR, or R4, or rapid real-time routing is an open source computer program written in C that has implemented multiple public transport journey planning algorithms. The software accepts [[General Transit Feed Specification|GTFS]], as input, and compiles this to an intermediate timetable format. Additionally [[GTFS-realtime]] is supported for updating the journey planner in realtime. The output of the program complies to the JSON format found in [[OpenTripPlanner]]. The program can be used in simple A-B routing, and directly supports A to all, and all to B at the same operating cost. The software supports advanced routing features such as wait-time compression. Additionally an API for the Python programming language is available allowing scripted batch processing. The source code is available under a BSD license on [https://github.com/bliksemlabs/rrrr/tree/python-bindings Github].<br />
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== Background ==<br />
In The Netherlands a pre-commercial public procurement for ITS project was organised by [https://www.brabant.nl/ Province of Noord-Brabant] as part of the national Dutch project [http://www.beterbenutten.nl/en Optimising Use]. The project Multimodal Travel Information (MMRI) would host five consortia bridging the gap between realtime public transport data in national Dutch interfaces and journey planners. The Bliksem Consortium (now: Bliksem Labs B.V.) was formed to build a journey planner small enough to run on a mobile device without an internet connection. The initial pitch contained demo of static information running on iOS and Android. During the project a mobile journey planner, server program and data integration platform were created. The high quality input data Bliksem Integration provided in GTFS and GTFS-RT was used by all other consortia, and includes accessibility features for all trips and stops in the network.<br />
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== Key people involved == <br />
* Andrew Byrd, initial implementation and interpretation of the [http://research.microsoft.com/pubs/156567/raptor_alenex.pdf RAPTOR paper] paper by Daniel Delling, Thomas Pajor and Renato F. Werneck.<br />
* Stefan de Konink, the current project lead and responsible for the initial time-dependent file structure and realtime updates. Furthermore the conversion of all code to ANSI-C and interpretation and implementation of the [http://tpajor.com/assets/paper/dpsw-isftr-13.pdf|Connection Scan Algorithm paper].<br />
* Thomas Koch, the Java bridge to Android and further development of timetable integration in the side project: [[Bliksem Integration]] and Bliksem Integration Realtime.<br />
* Joel Haasnoot, the initial Windows Phone implementation.<br />
* Edwin Bosveld, the initial iOS implementation.</div>Skinkie