NBI - National Bridge Inventory

Infrastructure
Operational
FIM
The National Bridge Inventory (NBI) serves as the authoritative data source for the location, description, classification, and condition of the critical bridge infrastructure used for inventory and legislative purposes.
Author

USDOT & FHWA

Published

June 29, 2026

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The National Bridge Inventory (NBI) serves as the authoritative data source for the location, description, classification, and condition of the critical bridge infrastructure used for inventory and legislative purposes. Maintained by the Federal Highway Administration (FHWA), this extensive dataset encompasses information on over 735,000 bridges along public roads, including interstate highways, U.S. highways, state and county roads, and publicly accessible bridges on federal and tribal lands. This data can be accessed (in ASCII form) here. See how these are being transformed to hydrolocations for the hydrofabric here.