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OpenTripPlanner 2

OpenTripPlanner (OTP) is an open source multi-modal trip planner, focusing on travel by scheduled public transportation in combination with bicycling, walking, and mobility services including bike share and ride hailing. Its server component runs on any platform with a Java virtual machine (including Linux, Mac, and Windows). It exposes GraphQL APIs that can be accessed by various clients including open source Javascript components and native mobile applications. It builds its representation of the transportation network from open data in open standard file formats (primarily GTFS and OpenStreetMap). It applies real-time updates and alerts with immediate visibility to clients, finding itineraries that account for disruptions and service changes. OTP is released under the LGPL license. As of 2020, the codebase has been in active development for over ten years, and is relied upon by transportation authorities and travel planning applications in deployments around the world.

You are currently reading the documentation for OpenTripPlanner 2, the second major version of OTP.

Versions of this documentation

Several versions of this documentation are built and published automatically for different branches of OTP. Each of these has a different stable URL, and you may switch between these versions using the selector in the upper left of the published documentation.



  • dev-2.x - OTP 2 active development


The end users of OTP are the millions of people who rely on it to help plan their daily travel, often without even knowing they are using OTP. As an infrastructure component, installation and configuration of OTP tends to be somewhat technical and essentially invisible to those end users. This documentation is intended for people who wish to perform such deployments of OTP without necessarily diving into the internal details of the software.

For members of the OTP community interested in software development, additional documentation detailing algorithms, data structures etc. is available as markdown files within the source code packages. It can be read in your IDE or when browsing the source tree on Github. See OTP Architecture.

Quick Start

We encourage you to read the introductory sections of this documentation to familiarize yourself with OpenTripPlanner use cases and configuration. But if you want to get started right away running your own OTP instance, the best place to start is the Basic Tutorial page.

Getting help

The fastest way to get help is to use our Gitter chat room where most of the core developers are. You can also send questions and comments to the mailing list or file bug reports via the Github issue tracker. Note that the issue tracker is not intended for support questions or discussions. Please use the chat or the mailing list instead.

Financial and In-Kind Support

OpenTripPlanner is a member project of Software Freedom Conservancy, a 501(c)(3) organization incorporated in New York, and donations made to it are fully tax-deductible to the extent permitted by law. Donations can be made by credit card, wire transfer or paper check. Please contact for instructions.

OTP development is primarily carried out by full-time software engineers employed by transportation authorities and consultancies. Even with funding, it can be difficult to engage staff who have the specialized skill set required. Therefore, one of the best ways to support OTP is to allocate software development staff at your organization with transportation domain knowledge to participate in weekly development meetings and contribute to this effort. This also builds connections between organizations favoring open source collaboration.