Founded as an all-digital library program, NTL’s collections in ROSA P are full-text electronic publications, datasets, and other resources. The repository is also designated as the full-text repository for USDOT-funded research under the USDOT Public Access Plan. NTL provides its collections freely to transportation researchers, statistical organizations, the media, and the general public.

Collection Overview
To meet the requirements outlined in its legislative mandate, NTL collects resources across the transportation domain, specifically focused on information from USDOT, state DOTs, and other transportation organizations. Content types found in ROSA P include text, links to websites, datasets, images, video, other multimedia, and maps. These resources have value to federal, state, and local transportation decision makers, transportation analysts, and researchers. As of December 2016, the repository has approximately 55,000 records and serves as the full-text archive for the transportation research ecosystem.

All resources in ROSA P are in the public domain and/or explicit permission has been provided by the rights holder to NTL to make their materials available for free over the web

For more information, please see the ROSA P Collection Development Policy

Persistence Statement
All resources deposited into ROSA P will be assigned a digital object identifier, or DOI, as a persistent identifier. This globally unique link will always lead users to a landing page containing the resource and its metadata or a description documenting the alteration and/or destruction of the information source, if applicable. The DOI will always resolve to a landing page with metadata describing the curation of the resource, even if the resource itself is removed. NTL’s plan for organizational persistence and succession can be located in its Digital Curation Policy