The following are known deployments of OTP in a government- or agency-sponsored production capacity:
- Finland (nationwide) The Helsinki Regional Transport Authority, the Finnish Transport Agency, and other Finnish cities have collaborated to create Digitransit, providing OTP-based trip planners, APIs, open data, Docker containers and open source code. Each member organisation runs its own instance of a shared codebase and deployment environment. Their source code is available on Github, including a new custom UI. This system also has a strong real-time component.
- Norway (nationwide) Ruter provides a journey planner for the Oslo region. It has been in production since January 2016 and serves around 200,000 users per day. Since November 2017, Entur has also prodvided a nation-wide journey planner which consumes schedule data in the EU standard NeTEx format with SIRI realtime updates.
- Portland, Oregon TriMet is the agency that originally started the OpenTripPlanner project. Their Regional Trip Planner is based on OTP and provides about 40,000 trip plans on a typical weekday.
- New York State The State Department of Transportation's transit trip planner provides itineraries for public transit systems throughout the state in a single unified OTP instance.
- Los Angeles, California The new metro.net trip planner.
- Boston, Massachusetts The Massachusetts Bay Transportation Authority trip planner.
- Seattle, Washington The Sound Transit Trip Planner
- Arlington, Virginia The commute planning site for the Washington, DC metropolitan area depends on OpenTripPlanner to weigh the costs and benefits of various travel options, making use of profile routing.
- Piemonte Region, Italy and the City of Torino built on OpenTripPlanner by 5T.
- Valencia, Spain from the Municipal Transport Company of Valencia S.A.U.
- Grenoble, France from SMTC, Grenoble Alpes métropole, l'État Français, the Rhône-alpes region, the Isère council and the City of Grenoble.
- Rennes, France where the STAR network provides an OTP client for iOS, Android, Windows Phone et Web.
- Poznań, Poland from Urban Transport Authority of Poznań (ZTM Poznan).
- Trento Province, Italy - ViaggiaTrento and ViaggiaRovereto were implemented as part of the SmartCampus Project, a research project founded by TrentoRise, UNITN, and FBK.
- University of South Florida (Tampa, Florida). The USF Maps App is a responsive web application for that helps university students, staff, and visitors find their way around the campus using multiple modes of transportation, including the USF Bull Runner campus shuttle, Share-A-Bull bike share, and pedestrian pathways. Open-sourced on Github.
- Atlanta, Georgia the Metropolitan Atlanta Rapid Transit Authority's (MARTA) trip planner and the Atlanta region's transit information hub atltransit.org both use OTP to power their website trip planners.
The following OTP-based services are presented as production-quality deployments, but are not backed by an official transportation authority or government. OTP is also known to be used on the back end of several popular multi-city mobile trip planning applications.
- The Netherlands (nationwide) Plannerstack Foundation provides national scale trip planning APIs using OTP and other open source trip planners, based on OpenOV's extremely detailed open data including minutely real-time updates for every vehicle in the country.
- OTP Android by CUTR-USF and Vreixo González can find itineraries on many different OTP servers via a service discovery mechanism.
- ViviBus Bologna Bologna, Italy.