Transportation Data Exchange Initiative

The Transportation Data Exchange Initiative (TDEI) is focused on developing a shared, standardized framework for transportation data, enabling seamless integration across mobility systems. This project aims to provide mobility benefits for travelers and service providers by collecting and providing infrastructure to sustainably support open data about sidewalks, transit paths, and on-demand transit services. Through supporting the collection, maintenance, and exchange of detailed data on pedestrian pathways, transit networks, and on-demand services, TDEI lays the groundwork for more effective transportation planning and innovation.

Reliable data is essential for decision-making. TDEI addresses gaps in transportation data through a three-pronged approach:

• Enhance data standards to include information relevant to all travelers and transit stakeholders.
• Provide tools and data infrastructure reducing barriers for data stewards to collect, vet, maintain and use traveler-centric transportation data at scale.
• Demonstrate our work through pilot data collections with private and public partners, and demonstration projects that make use of our data.

With the support of the Transportation Data Exchange Initiative (TDEI), the OpenSidewalks project and its suite of tools—including AccessMap Multimodal—provide detailed insights into sidewalk connectivity and pedestrian networks. These resources equip individuals, civic organizations, and government agencies with the data needed to support informed mobility planning and decision-making.

TDEI is a project sponsored by the ITS4US Deployment Program, focused on improving frameworks for transportation services and infrastructure. By developing open-source data collection tools, digital infrastructure, and governance models, TDEI enables seamless public-private data exchange and interoperability.

Learn more at https://tdei.cs.washington.edu/

Downloadable TDEI flyer (TRB 2025 version)