Box E - Source and Reliability of the CFS Data and Other Sources Used in this Report

The CFS data presented in this report are estimates derived from a sample survey. Because the CFS is a sample survey and uses estimation methods and procedures to estimate total freight activity for the...

Figure 13 Top 10 Commodity Groups Ranked by Value Per Ton: 2002*

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(Commodity Flow Survey Data Only) (dollars)

Box B - What Isn't Covered by the CFS and BTS Estimates

While the BTS estimates of total freight shipments provide the most complete commercial freight picture for all modes of transportation, they exclude most shipments by the retail sector and government shipments, such as goods for defense...

Figure 1 Value, Weight, and Ton-Miles of U.S. Commercial Freight Shipments: 1993, 1997, and 2002*

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KEY: * 2002 data are preliminary.

NOTE: The value of freight shipments is inflation-adjusted with the goods...

Box C - Meaning of Shipment, Value, Tons, and Ton-Miles in the CFS

Shipment. A shipment is a single movement of goods, commodities, or products from an establishment to a single customer or to another establishment owned or operated by the same company as the originating establishment (e.g.,...

Box A - How to Interpret Shipment Value and Tonnage Data

The value and ton totals in the CFS represent the sum of separate shipments of a commodity as it moves through the production and consumption segments of the supply chain. Therefore the CFS totals are much larger than the value-added...

Figure 3 Modal Shares of U.S. Commercial Freight Shipments by Value, Weight, and Ton-Miles: 1993, 1997, and 2002*

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KEY: * 2002 data are preliminary.

NOTE: Multimodal includes the traditional intermodal...

Figure 5 Increases in U.S. Commercial Freight Shipments and Related Growth Factors: 1993-2002*

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KEY: * 2002 data used in these calculations are preliminary.

NOTE: The value of freight shipments...

Figure 3 Modal Shares of U.S. Commercial Freight Shipments by Value, Weight, and Ton-Miles: 1993, 1997, and 2002*

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(Percent)

Figure 12 Value Per Ton of Shipments by Shipment Size: 1993, 1997, 2002*

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(Commodity Flow Survey Data Only) (dollars)