By investing in open-source software, government agencies, companies, and non-profit organizations can leverage their investments to create shared, public benefits. In effect, those who invest in open-source software are attempting to "pool" their investments to create software that lives in the public commons. Part of organizations' hoped-for return on their open-source investments is that other organizations will also invest in ongoing, incremental improvements to the same software, yielding continued benefits at no additional cost. Additionally, adopting open-source software can reduce vendor lock-in to high-cost, proprietary software.
Practices that support open-source software
Developing open-source software is a complex undertaking given the competing demands of software code that is both (a) sufficiently generalizable to be useful to a diverse array of users, and (b) sufficiently tailored to any given end-users' needs. It is also challenging to coordinate open-source software development, especially when there are many users likely to be impacted by any given change. Public-sector transportation agencies can advance open-source software development using the following strategies, among others:
- Adding open-source requirements to software procurements
- Adding a budget line-item and/or project task for the "open-sourcing" and related documentation of newly developed code
- Clearly communicate successes and open-source software implementations
- Coordinate with peer agencies to identify list of shared priorities and share costs for larger 'capital' improvements to open-source code blocks.
Transportation agencies supporting open-source software
- Sound Transit
- Oregon DOT
Private companies developing open-source transportation software
- Cambridge Systematics
- IBI Group
Non-profit organizations developing open-source transportation software
- Zephyr Foundation
Open-source transportation software projects
The Awesome Transit Github page also provides a list of open-source software projects.
- Provides an API optimized for accessing real-time transit information
- Includes open-source native apps for iOS, Android, Amazon Alexa, Google Glass
- Can consume GTFS-realtime and other real-time formats
- Deployed in 10 cities with more than 1 million users
- Available for iOS and Android
- Provides an API optimized for multimodal trip planning, including bikeshare
- Can consume GTFS-realtime, General Bikeshare Feed Specification (GBFS)
- At least 13 production deployments globally, including the LA Metro and MBTA websites
- Generating arrival/departure predictions given raw vehicle data
- Can export predictions in GTFS-realtime and other formats
-  "Can Open Source Transit Software Survive?" TransportationCamp 2018. Discussion moderated by Sean Barbeau and Kari Watkins. Retrieved 17 January 2018
-  OneBusAway. Retrieved 17 January 2018
- OpenTripPlanner. Retrieved 17 January 2018
-  TheTransitClock. Github. Retrieved on 17 January 2018.