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A guide to navigation and search in the National Transportation Library's digital repository

Standard Service Features (SSF) Description

National Transportation Library (NTL) Repository & Open Science Access Portal (ROSA P) Standard Service Features (SSF) Description


Standard Service Features

Standard features of this service are:

  • The Repository & Open Science Access Portal (ROSA P) is the National Transportation Library’s (NTL) digital repository service, available at:
  • ROSA P is home to significant transportation research and transportation statistical publications and datasets, which have value to federal, state, and location transportation decision-makers, transportation analysts, and researchers.
  • ROSA P is the repository instantiated by NTL to meet the mandates of the USDOT “Plan to Increase Public Access to the Results of Federally-Funded Scientific Research” (Public Access Plan).
  • ROSA P is a cloud-based digital repository for transportation research, including data. ROSA P also provides robust backup of items.
  • ROSA P features both simple and advanced search options to improve user search outcomes.
  • ROSA-P is a production level system that what gone through USDOT formal ATO process and meets all USDOT security requirements.
  • 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.
  • All resources deposited into ROSA P will be assigned 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 resource, if applicable. The persistent identifier will always resolve to a landing page with metadata describing the curation of the resource, even if the resource itself is removed.
  • ROSA P allows interested users to access records and/or record metadata through an OIA-PMH RESTful API service. Full guidance on this access is available in the ROSA P “Help” menu.
  • In order to maximize data findability, accessibility, interoperability, and re-use, ROSA P is operated in concordance with the FORCE 11 FAIR Principles


Standard Service Expectations

USDOT Operating Agencies, research centers, or offices, which elect to use ROSA P as their repository for their public access publications and datasets, can expect:

  1. NTL will protect and preserve publications and data by keeping copies of files in a dedicated location in NTL’s USDOT servers, hosted in the Microsoft’s Azure cloud environment, backed up nightly; ingesting files into the NTL Workroom, hosted in the Microsoft’s Azure cloud environment; and, ingesting files into the CDC STACKS, hosted in the AWS cloud environment, backed up nightly, with 45 days of backups available;
  2. NTL will place the publications and datasets in ROSA P, which is housed on 3 (three) servers, in 2 (two) distinct geographic regions;
  3. USDOT offices have the option to have their published products stored within a special, named sub-collection in ROSA P;  
  4. Datasets will have relational links to associated reports;
  5. NTL will apply appropriate metadata, subjects, and Transportation Research Thesaurus (TRT) << >> terms to catalog records in ROSA P to maximize discoverability through web-based search engines such as << >>  and Google Scholar << >>  ; and,
  6. NTL will supply links to ROSA P records to the Transportation Research Board’s (TRB) Transportation Research International Database (TRID)  << >> for insertion in indexing records.


Standard Service Issue Tracking and Reporting

NTL’s current issue tracking system can be accessed at and by clicking the “Email a Reference Librarian” link on the right side of the page. Users are then taken to a fillable form.

  • USDOT customers preface text in the “Question” description box with the abbreviation of their modal office (for example: “NHTSA: Missing Report” or “ITSJPO: Misspelled Author”)
    • This will alert the reference team that this a high priority ticket.
  • Customers will receive a confirmation email that their issue has been reported, if they check the “Receive an email confirmation of your submission” check box at the bottom of the form.
  • An initial response will come within 3 business day, including the Ticket Number, and an estimate of time to issue solution.


Standard Service Data File or Large File Submission Procedure

Customers who would like to submit large data files or a large number of files should use USDOT’s Secure Large File Transfer (SLFT) service  

Alerts of files to be downloaded, or requests for SLFT, shall be made by sending an email to


Change Log

  • Version 1: 2018-05-08
  • Added to LibGuide 2018-11-28