What is the coverage of the North American Transborder Freight Data?
Beginning with the 1997 data, the North American Transborder Freight Data represents official U.S. trade with Canada and Mexico for shipments that entered or exited the United States by surface modes of transport (other than air or vessel). The data from April 1993 to December 1996 included official U.S. trade with Canada and Mexico by surface modes and transshipments that moved from a third country through Canada or Mexico to the United States or from the United States to a third country through Canada or Mexico. For this time period, it was not possible to separate transshipment activity from the official trade activity at the detailed level. Due to customer requests, RITA/BTS discontinued the inclusion of transshipment activity in the North American Transborder Freight Data beginning with the January 1997 data month. This allows customers to perform comparable trade analyses by mode of transportation. Starting January 2004, North American Transborder freight data is available for ai
