Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Car-Miles, Not Seasonally Adjusted

Frequency:  Monthly

Switching And Terminal Companies Are Excluded. The Unadjusted Figure For January 1920 Was Derived By Subtracting The Known February Figure From A Two-Month Cumulative Total. Source: Interstate Commerce Commission, Data For 1920-1934: "Freight And Passenger Service Operating Statistics Of Class I Steam Railways In The United States"; Data For 1935-1943: "Freight Train Performance Of Class I Steam Railways In The United States"

This NBER data series m03042 appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03042