Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: G16058
For more information about this series, please see http://www.bea.gov/national/."
U.S. Bureau of Economic Analysis, Government current expenditures: Federal: Economic affairs: Transportation: Highways [G160581A027NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/G160581A027NBEA, December 18, 2017.