Abstract
This paper develops a monthly output index for the U.S. transportation sector from January 1980 through April 2002, covering air, rail, water, truck, transit and pipeline activities. Separate indexes for freight and passenger are also constructed. The total transportation output index matches very well with the annual transportation output figures produced by the Bureau of Labor Statistics and the Bureau of Economic Analysis. The strong, cyclical movements of transportation output appear to be more synchronized with the growth slowdowns in the U.S. economy than full-fledged recessions. This index led the turning points of the six National Bureau of Economic Research-defined growth cycles over the period with an average lead time of six months at peaks and five months at troughs.
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