Selon le Census Bureau : "Truck Transportation, Courier and Messengers, and Warehousing and Storage Revenues Hit $266 Billion Truck transportation, courier and messengers, and warehousing and storage revenues reached $266 billion in 2004, up from $246 billion the year before, the U.S. Census Bureau reported today. Truck transportation alone reached $186 billion in 2004, up 10.4 percent. Courier and messenger revenues grew 4.0 percent to $62 billion. The report, 2004 Service Annual Survey: Truck Transportation, Couriers and Messengers, and Warehousing and Storage, showed the following highlights for employer firms: General freight trucking contributed approximately two-thirds of all trucking revenue, with $125 billion in 2004. Trucks transporting specialized freight (requiring equipment such as flatbeds, tankers or refrigerated trailers) accounted for the remainder of revenue, at $61 billion. For-hire, local general freight trucking revenues grew 8.0 percent to $20 b