National Bridge Inventory (NBI) 追踪美国公共道路上所有桥梁的状态、位置及结构健康状况。交通部门利用 NBI 监测基础设施健康，确定维修与更换的优先级，分配联邦资金，并通过标准化检查确保公共安全。

The National Bridge Inventory (NBI) tracks the status, location, and structural health of all bridges on public roads in the U.S. Transportation agencies use the NBI to monitor infrastructure health, prioritize repairs and replacements, allocate Federal funding, and ensure public safety through standardized inspections.