Table B-1b. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for the United States: Percent of Total for 2002, 1997 and 1993

Table B-1b. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for the United States: Percent of Total for 2002, 1997 and 1993

[Estimates are shown as percents and are based on data from the 2002, 1997, and 1993 Commodity Flow Surveys]

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Mode of transportation Value (percent) Tons (percent) Ton-miles (percent)
2002 1997 1993 2002 1997 1993 2002 1997 1993
Total
Single modes 0.3 0.3 0.4 0.5 0.3 0.4 0.7 0.8 0.6
Truck 0.4 0.4 0.4 1.0 0.6 1.0 1.5 1.1 1.1
For-hire truck 0.6 0.3 0.3 1.0 0.6 0.8 1.2 0.8 0.8
Private truck 0.5 0.4 0.5 0.8 0.7 0.7 0.4 0.3 0.3
Rail 0.2 0.2 0.2 0.7 0.5 0.5 1.3 1.5 0.8
Water 0.4 0.2 0.4 0.7 0.5 0.9
Shallow draft 0.3 0.2 0.3 0.7 0.4 0.7
Great Lakes S 0.1 0.1 0.1
Deep draft 0.3 0.1 0.3 0.4 0.3 0.7
Air (includes truck and air) 0.4 0.2 0.1
Pipeline 0.1 0.1 0.2 0.4 0.4 0.5 S S S
Multiple modes 0.4 0.3 0.3 0.2 0.1 0.2 0.8 0.7 0.7
Parcel, U.S.P.S. or courier 0.3 0.2 0.2
Truck and rail 0.1 0.2 0.1 0.1 0.4 0.1
Truck and water 0.1 0.2 0.4 0.3
Rail and water 0.2 0.1 0.1 0.9 0.5 0.5
Other multiple modes 0.1 0.2 S
Other and unknown modes 0.1 0.1 0.2 0.4 0.3 0.4 0.2 0.3 0.5

KEY:
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality.

NOTES: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, United States Data, December 2004.