According the latest Economic Census (2002), the trucking industry is the largest contributor of revenue in the transportation sector, contributing more than one-quarter of the sectors revenue. The air industry contributes just under one-quarter, as does other transportation and support activities, which include sightseeing, couriers and messengers, towing services, port and airport operations, and other support activities.

Transportation Sector Revenue by Industry, 2002 Economic Census
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Supporting Information

Transportation Sector Revenue by Industry, 2002 Economic Census
IndustryBillion DollarsShare of Total
Truck91.427.8%
Air80.024.3%
Other Transportation & Support Activities75.522.9%
Warehousing & Storage26.17.9%
Rail26.07.9%
Transit & Ground Passenger Transportation14.44.4%
Pipeline10.43.2%
Water5.31.6%
Total329.1100.0%

Source: National Academy of Sciences, Technologies and Approaches to Reducing the Fuel Consumption of Medium and Heavy-Duty Vehicles, prepublication copy, March 2010, p. 1-8.
Original source: U.S. Department of Commerce, Bureau of the Census, 2005.

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