Abstract: The National Transportation Library (NTL) at the United States Department of Transportation (USDOT) provides national and international access to the crucial transportation information that falls within the scope of grey literature, including the results of U.S. government funded research. Founded as an all-digital library in 1998, NTL’s collections include full-text-born digital and digitized publications, data products, and other resources. All items are in the public domain and available for reuse without restriction. Since 2016, NTL has led the implementation of the USDOT’s Official Public Access Plan issued in response to the February 22, 2013 Office of Science and Technology Policy (OSTP) Memorandum for the Heads of Executive Departments and Agencies entitled Increasing Access to the Results of Federally Funded Scientific Research. This paper discusses the effect this plan has had on a grey literature library and the efforts to create and maintain a public access repository, as well as exploring relationships between repository platform, contents, and people.