CDA Program

Automated vehicles working together.


The Federal Highway Administration (FHWA) Cooperative Driving Automation (CDA) Program is shaping the future of transportation systems management and operations (TSMO) by strengthening infrastructure capabilities and developing platforms for collaborative research and development (R&D) of CDA to advance the safety, efficiency, and sustainability of the entire connected transportation system.

The CDA Program is made up of four focus areas: CDA Research, CDA Testing & Evaluation, CDA Engagement, and CDA Safety.

Source: FHWA.

The introduction of CDA concepts to the transportation system will affect existing transportation strategies. The CDA Program developed three research tracks –traffic, reliability, and freight–in anticipation of these impacts. These research tracks leverage partnerships with relevant Federal agencies to accelerate CDA R&D efforts as well as explore CDA applications to transportation operations scenarios.

Visit the CDA Research page on this Confluence space to learn more about the three research tracks.

Source: FHWA.

CDA Testing & Evaluation takes on three methods of testing: simulation, hybrid (simulation and physical), and physical testing. As suggested by the name, CDA Testing & Evaluation aims to test and evaluate CDA technologies. The testing of CDA will ensure that these technologies are ready to be safely deployed on existing transportation systems.

Visit the CDA Testing & Evaluation page on this Confluence space to learn more.

Source: FHWA.

The CDA Program engages stakeholders to accelerate advancements in CDA research, development, and testing. CDA Engagement is a two-pronged approach and includes the CARMA Collaborative and CARMA Support Services initiatives. These activities aim to increase awareness about CARMA, foster collaboration, and encourage adoption by stakeholders and industry.

Visit the CDA Engagement space to learn more.

CDA Safety involves human factors testing in the field and through simulation, including driver-in-the-loop simulation.


CARMA is a U.S. Department of Transportation initiative involved in the effort to advance CDA through collaboration and open source software (OSS) development. CARMA enables researchers and engineers to develop and test their CDA features on properly equipped vehicles.

The CARMA Ecosystem consists of core and support products that aid and enable the advancement of the four focus areas of the CDA Program.

Visit the CARMA Ecosystem page on this Confluence space for more information on the individual products.


The CARMA Video Series provides a comprehensive overview of CARMA, the set of tools that enable the focus areas under the FHWA CDA Program. Videos in the series cover various components of CDA, the CARMA Ecosystem, and different CARMA features research, development, and testing.

Source: FHWA.
CARMA Video Series Playlist.

To view all videos in the series, please visit the CARMA Video Series on YouTube.


Govind Vadakpat
CDA Program Manager, FHWA

Pavle Bujanovic
CDA Program Technical Manager, FHWA

Sudhakar Nallamothu
CDA Program Project Manager

Chris Stanley
Saxton Transportation Operations Laboratory Program Manager

Visit the CDA Program Team page to view everyone who has contributed to the CDA Program.