Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002

Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

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All modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 10.4 21.7 13.1 11.0
Less than 50 lbs 13.9 1.7 12.9 14.9 0.1 11.3
50 to 99 lbs 15.7 0.3 12.4 15.8 11.0
100 to 499 lbs 8.0 1.1 13.0 0.4 13.5 0.3 14.5
500 to 749 lbs 11.9 0.4 9.7 0.1 14.0 0.1 11.2
750 to 999 lbs 21.9 0.4 15.9 17.9 0.1 13.5
1,000 to 9,999 lbs 16.7 2.4 15.8 1.6 15.6 1.8 6.4
10,000 to 49,999 lbs 15.8 2.5 22.7 2.3 14.2 2.3 17.4
50,000 to 99,999 lbs 25.0 0.9 32.3 2.5 38.1 1.9 26.5
100,000 lbs or more 35.3 0.2 29.5 1.0 36.1 2.4 20.3

Single modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 11.3 21.0 13.5 8.9
Less than 50 lbs 19.9 1.0 13.7 14.7 22.9
50 to 99 lbs 9.1 0.2 15.6 11.4 16.3
100 to 499 lbs 10.3 1.3 14.8 0.4 16.7 0.3 15.3
500 to 749 lbs 13.1 0.5 9.7 0.1 14.6 0.1 11.0
750 to 999 lbs 22.4 0.4 16.4 19.3 0.1 13.4
1,000 to 9,999 lbs 17.6 2.5 15.8 1.5 16.6 1.8 5.7
10,000 to 49,999 lbs 15.8 3.1 22.3 2.2 14.4 2.4 17.1
50,000 to 99,999 lbs 25.0 1.1 29.7 2.4 38.4 1.9 25.8
100,000 lbs or more 35.0 0.2 30.5 1.0 36.1 2.4 18.7

Truck

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 12.5 21.7 15.4 9.7
Less than 50 lbs 18.5 1.0 14.3 16.1 25.3
50 to 99 lbs 9.6 0.3 15.5 12.6 18.7
100 to 499 lbs 10.4 1.7 14.8 0.5 16.8 0.4 15.3
500 to 749 lbs 13.3 0.5 9.8 0.2 15.1 0.1 11.1
750 to 999 lbs 23.1 0.5 16.6 19.6 0.1 13.2
1,000 to 9,999 lbs 18.7 3.1 16.0 1.6 17.3 2.0 7.4
10,000 to 49,999 lbs 19.9 4.1 22.4 2.0 15.5 2.2 17.9
50,000 to 99,999 lbs 25.1 1.1 30.0 2.4 43.0 1.9 27.4
100,000 lbs or more 38.8 S S S S S

Rail

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 32.1 33.6 31.7 16.0
Less than 50 lbs
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 39.7
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs 34.6 15.9 24.1 6.7 27.1 9.2 17.8
50,000 to 99,999 lbs S S S S S S 24.7
100,000 lbs or more 38.1 12.5 36.9 6.8 42.4 9.0 14.6

All other Single modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes S S S S S S 6.3
Less than 50 lbs S S 25.3 4.4 27.4 5.3 6.4
50 to 99 lbs 20.1 4.4 33.7 2.6 48.8 3.9 12.0
100 to 499 lbs 28.4 9.2 28.6 11.3 21.2 10.5 17.8
500 to 749 lbs S S S S S S 22.7
750 to 999 lbs S S S S S S 30.1
1,000 to 9,999 lbs S S S S S S 22.2
10,000 to 49,999 lbs S S S S S S 26.8
50,000 to 99,999 lbs
100,000 lbs or more

Multiple modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 16.9 13.6 15.5 10.3
Less than 50 lbs 19.0 3.5 16.4 5.1 17.6 5.1 10.7
50 to 99 lbs 26.3 2.1 25.5 2.3 22.8 2.4 8.6
100 to 499 lbs 16.2 2.5 18.3 3.2 10.0 2.4 17.6
500 to 749 lbs 45.2 0.6 37.5 2.1 26.3 1.0 23.5
750 to 999 lbs S S 45.4 1.3 47.0 1.7 29.5
1,000 to 9,999 lbs 29.5 33.7 0.4 41.1 0.9 S
10,000 to 49,999 lbs 42.8 0.7 29.7 3.6 31.0 7.7 13.7
50,000 to 99,999 lbs
100,000 lbs or more

Parcel, USPS or courier

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 17.2 14.2 13.8 10.3
Less than 50 lbs 19.0 3.5 16.4 5.1 17.6 4.1 10.7
50 to 99 lbs 26.3 2.1 25.5 2.3 22.8 2.0 8.6
100 to 499 lbs 16.2 2.7 18.3 3.9 10.0 2.7 17.7
500 to 749 lbs 45.2 0.7 37.5 2.6 26.3 1.4 23.5
750 to 999 lbs S S 45.4 1.4 47.0 1.9 29.5
1,000 to 9,999 lbs S S S S S S 30.3
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

All other multiple modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 40.8 28.2 29.3 13.0
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 30.0
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs 37.1 5.0 43.1 3.6 43.2 3.5 32.7
10,000 to 49,999 lbs 42.8 4.9 29.7 3.6 31.0 3.5 13.7
50,000 to 99,999 lbs
100,000 lbs or more

Other and unknown modes

Shipment Weight Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All shipment sizes 29.4 S S 34.9 S
Less than 50 lbs 45.5 4.9 40.0 0.4 39.0 S
50 to 99 lbs S S S S S S S
100 to 499 lbs S S 48.5 1.6 42.1 0.9 S
500 to 749 lbs S S 46.8 0.7 41.4 S
750 to 999 lbs S S 38.2 0.4 35.2 0.3 S
1,000 to 9,999 lbs 40.0 8.6 34.9 12.8 31.9 10.7 19.1
10,000 to 49,999 lbs 38.0 7.1 S S S S S
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more 44.2 1.8 44.2 7.2 49.4 0.3 26.9

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.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information onf 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, Metropolitan Data, December 2004.