Cooperative Driving Automation (CDA), as defined by SAE International Standard J3216, enables communication and cooperation between properly equipped vehicles, infrastructure, and other road users. Information shared among CDA participants can directly influence the dynamic driving task (DDT) by one or more nearby vehicles with driving automation feature(s) engaged. Ultimately, CDA-enabled cooperation can facilitate the safer and more efficient movement of road users, which can significantly improve the overall performance of the transportation system—and at lower cost than traditional methods. The CDA Research Program is the Federal Highway Administration’s initiative to develop the tools and concepts used by CDA in support of Transportation Systems Management and Operations (TSMO) to accelerate technology deployment. The program uses the CARMA projects open-source software (OSS) approach, coupled with agile development practices, to develop and test CDA features involving smart infrastructure, properly equipped vehicles, and other road users. Over the past two years several use cases have been tested in closed course test tracks. This presentation will provide an overview of the various use cases and results from testing, and will propose next steps to encourage incorporation of the concepts into smart infrastructure and production vehicles to improve the safety, efficiency, and resilience of the transportation system.