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 5.3 16.0 20.0 14.9
Less than 50 lbs 11.0 0.7 14.0 19.9 14.9
50 to 99 lbs 14.8 0.3 15.1 19.1 19.3
100 to 499 lbs 13.6 1.5 19.9 0.1 15.6 0.2 15.5
500 to 749 lbs 17.6 0.3 17.1 15.6 15.0
750 to 999 lbs 21.8 0.4 21.4 18.3 21.7
1,000 to 9,999 lbs 15.6 3.7 26.4 1.1 16.5 2.7 23.8
10,000 to 49,999 lbs 12.1 4.4 22.5 3.6 16.2 3.5 13.5
50,000 to 99,999 lbs 18.1 0.8 19.9 3.1 18.0 1.5 18.3
100,000 lbs or more 33.1 1.1 20.3 4.9 27.9 6.2 36.3

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 6.3 15.1 14.8 22.8
Less than 50 lbs 24.9 0.6 15.0 33.0 23.2
50 to 99 lbs 15.2 0.1 14.9 23.5 26.5
100 to 499 lbs 12.6 0.9 22.4 0.1 13.6 0.1 24.0
500 to 749 lbs 17.5 0.3 18.6 16.9 17.2
750 to 999 lbs 21.4 0.5 21.5 17.4 22.6
1,000 to 9,999 lbs 14.3 3.6 28.3 1.2 17.5 2.3 24.5
10,000 to 49,999 lbs 12.2 3.8 22.5 3.9 16.3 3.6 13.0
50,000 to 99,999 lbs 18.0 1.1 19.9 3.1 17.7 1.6 18.5
100,000 lbs or more 36.4 1.5 20.6 4.9 22.6 5.4 38.4

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 6.6 17.5 13.4 13.8
Less than 50 lbs 24.9 0.5 14.8 15.8 24.7
50 to 99 lbs 16.5 0.1 20.7 24.6 28.0
100 to 499 lbs 13.1 0.9 22.5 0.3 13.5 0.1 24.3
500 to 749 lbs 17.5 0.3 18.6 16.8 17.3
750 to 999 lbs 21.2 0.6 21.5 0.1 17.5 22.9
1,000 to 9,999 lbs 7.4 2.6 29.2 1.6 16.5 1.8 15.8
10,000 to 49,999 lbs 12.3 3.4 22.6 4.0 16.7 4.4 13.2
50,000 to 99,999 lbs 18.8 1.2 20.2 4.2 19.4 2.2 12.7
100,000 lbs or more S S 28.9 3.1 31.8 2.6 48.2

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 44.4 24.0 22.7 11.4
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 24.4
10,000 to 49,999 lbs 30.3 4.7 33.3 1.2 40.4 2.9 16.8
50,000 to 99,999 lbs 36.5 2.1 26.7 2.3 29.7 2.3 13.4
100,000 lbs or more 31.3 13.1 25.8 6.9 27.8 8.7 12.2

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 31.1 30.3 31.1 7.1
Less than 50 lbs 38.9 6.1 40.5 0.2 38.9 5.7 7.5
50 to 99 lbs 47.8 2.8 S S S S 30.5
100 to 499 lbs 46.2 5.0 35.4 34.7 0.2 7.4
500 to 749 lbs S S 48.4 S S 25.6
750 to 999 lbs S S S S S S 28.3
1,000 to 9,999 lbs S S S S S S 23.1
10,000 to 49,999 lbs 45.2 5.5 40.9 37.6 1.6 34.0
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more 36.4 8.2 30.4 0.3 31.4 9.3 18.5

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 20.4 36.1 39.9 8.3
Less than 50 lbs 12.0 8.4 19.1 0.5 27.1 0.6 8.0
50 to 99 lbs 24.5 1.4 23.1 0.3 27.4 0.4 14.1
100 to 499 lbs 25.1 6.7 18.6 0.7 29.5 0.5 17.8
500 to 749 lbs S S 31.5 0.2 27.8 0.1 36.8
750 to 999 lbs S S S S S S 18.9
1,000 to 9,999 lbs 46.3 10.5 45.4 4.8 40.5 7.4 37.5
10,000 to 49,999 lbs S S S S S S 42.4
50,000 to 99,999 lbs S S S S S S 30.6
100,000 lbs or more 38.1 1.6 39.2 6.9 45.0 9.1 7.8

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 15.2 14.9 23.2 8.3
Less than 50 lbs 12.0 7.6 19.1 4.6 27.1 5.0 8.0
50 to 99 lbs 24.5 1.5 23.1 2.1 27.4 2.7 14.1
100 to 499 lbs 25.2 6.3 18.6 3.8 29.6 4.7 17.8
500 to 749 lbs S S 32.0 2.2 29.4 1.2 41.8
750 to 999 lbs S S S S S S 16.5
1,000 to 9,999 lbs
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 43.0 36.8 40.5 34.6
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 31.7
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 45.4 5.4 40.5 8.1 37.5
10,000 to 49,999 lbs S S S S S S 42.4
50,000 to 99,999 lbs S S S S S S 30.6
100,000 lbs or more 38.1 18.5 39.2 6.4 45.0 8.8 7.8

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 15.3 49.5 23.1 S
Less than 50 lbs 32.5 7.3 40.6 1.0 48.6 0.2 46.5
50 to 99 lbs S S S S S S S
100 to 499 lbs 26.8 0.7 32.9 1.1 31.2 0.3 44.6
500 to 749 lbs 45.9 0.3 S S S S S
750 to 999 lbs S S S S S S 32.7
1,000 to 9,999 lbs 32.0 10.4 17.4 13.5 18.9 10.2 19.2
10,000 to 49,999 lbs 40.0 11.5 S S 34.8 9.4 S
50,000 to 99,999 lbs S S S S S S 30.1
100,000 lbs or more

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.