美国国家交通图书馆（National Transportation Library, NTL）提供面向全美及国际的交通信息获取服务，统筹交通信息的生成与传播，并为美国交通部（Department of Transportation, DOT）员工及公众利益相关方提供参考咨询服务。NTL成立于1998年《21世纪交通公平法案》（Transportation Equity Act for the 21st Century, TEA-21；公法105-178），其法定职责于2012年《21世纪前进法案》（Moving Ahead for Progress in the 21st Century, MAP-21；公法112-141）中得到扩展。NTL的核心产品与服务为资源库与开放科学获取门户（Repository and Open Science Access Portal, ROSA P）（https://rosap.ntl.bts.gov）。ROSA P所收录的NTL馆藏包括全文数字化出版物、数据集及其他资源；具有历史价值、技术价值或国家意义的既有印刷文献在完成数字化后亦被纳入馆藏。该资源库同时被指定为美国交通部（USDOT）资助研究项目成果的全文存储库，以落实USDOT公共获取计划（USDOT Public Access Plan）。ROSA P中的全部馆藏向交通领域研究人员、统计机构、媒体及公众无限制开放。

The National Transportation Library (NTL) provides national and international access to transportation information, coordinates information creation and dissemination, and provides reference services for Department of Transportation (DOT) employees and public stakeholders. Established in 1998 by the Transportation Equity Act for the 21st Century (TEA-21; P.L. 105-178), NTL’s authorized role was expanded in 2012’s Moving Ahead for Progress in the 21st Century (MAP-21; P.L. 112- 141). NTL’s primary product and service is the Repository and Open Science Access Portal (ROSA P) (https://rosap.ntl.bts.gov). NTL’s collections in ROSA P are full-text digital publications, datasets, and other resources. Legacy print materials that have been digitized are collected if they have historic, technical, or national significance. The repository is also designated as the full-text repository for USDOT-funded research under the USDOT Public Access Plan. Collections in ROSA P are available without restriction to transportation researchers, statistical organizations, the media, and the general public.