Release: NBER Macrohistory Database
Series Is Presented Here As 2 Variables: (1) Original Data, 1922-26; (2) Original Data, 1924-43. Source: Dept. Of Commerce
This NBER data series m02094b appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: m02094b
National Bureau of Economic Research, Federal-Aid Roads Under Construction for United States [M02I4BUSM375NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M02I4BUSM375NNBR, October 22, 2018.