@BOOK{NAP21939, author = "Transportation Research Board and National Academies of Sciences, Engineering, and Medicine", editor = "s José Holguín-Vera and Jeffrey Wojtowicz and Carlos González-Calderón and Michael Lawrence and Jonathan Skolnik and Michael Brooks and Shanshan Zhang and Anne Strauss-Wieder and Lóri Tavasszy", title = "Freight Data Cost Elements", doi = "10.17226/21939", abstract = "TRB\u2019s National Cooperative Freight Research Program (NCFRP) Report 22: Freight Data Cost Elements identifies the specific types of direct freight transportation cost data elements required for public investment, policy, and regulatory decisionmaking. The report also describes and assesses different strategies for identifying and obtaining the needed cost data elements.", url = "https://nap.nationalacademies.org/catalog/21939/freight-data-cost-elements", year = 2013, publisher = "The National Academies Press", address = "Washington, DC" }