Release: NBER Macrohistory Database
Data Were Computed By Subtracting Commutation Passengers From Total Passengers. Preliminary Data Were Used Beginning April 1947. Source: Interstate Commerce Commission, Revenue Traffic Statistics Of Class I Steam Railways.
This NBER data series m03012d appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.
NBER Indicator: m03012d
National Bureau of Economic Research, Railroad Revenue Passenger-Miles, Other Than Commutation, Class I Railroads for United States [M0312DUSM429NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M0312DUSM429NNBR, December 14, 2019.