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 28.4 9.9 6.9 12.0
Less than 50 lbs 13.4 3.6 8.4 27.3 0.4 17.0
50 to 99 lbs 18.2 1.4 13.7 34.8 0.3 23.1
100 to 499 lbs 19.6 3.2 17.9 0.6 16.8 0.4 15.1
500 to 749 lbs 22.3 0.9 21.0 0.2 20.0 0.2 24.1
750 to 999 lbs 17.6 0.5 13.4 0.1 22.2 0.1 34.3
1,000 to 9,999 lbs 17.6 2.9 18.6 2.0 15.1 1.3 17.1
10,000 to 49,999 lbs 25.5 3.6 16.5 2.6 11.7 4.0 16.3
50,000 to 99,999 lbs 44.0 1.6 22.3 4.3 12.1 1.4 32.1
100,000 lbs or more S S 16.0 4.1 17.0 5.2 35.7

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 33.6 10.5 10.5 9.0
Less than 50 lbs 17.5 2.3 14.4 12.3 13.7
50 to 99 lbs 22.1 1.4 20.9 22.8 18.5
100 to 499 lbs 21.6 3.3 19.4 0.8 19.0 0.8 18.9
500 to 749 lbs 24.4 1.3 21.6 0.3 24.1 0.3 26.0
750 to 999 lbs 17.3 0.6 14.1 0.2 27.4 0.2 28.3
1,000 to 9,999 lbs 18.1 3.7 19.3 2.4 15.6 1.8 14.5
10,000 to 49,999 lbs 26.7 4.8 18.8 2.9 15.9 4.6 14.4
50,000 to 99,999 lbs 46.4 1.7 20.5 4.1 13.6 1.2 20.9
100,000 lbs or more S S 18.9 4.7 19.7 5.7 40.9

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 13.0 11.9 11.5 11.5
Less than 50 lbs 20.2 1.9 14.9 23.0 20.5
50 to 99 lbs 28.1 1.3 21.4 27.9 21.9
100 to 499 lbs 20.6 2.2 19.6 0.8 21.3 0.8 14.5
500 to 749 lbs 25.0 0.8 22.2 0.3 25.7 0.3 20.2
750 to 999 lbs 16.2 0.5 14.2 0.2 28.0 0.2 28.0
1,000 to 9,999 lbs 17.7 2.2 19.5 2.5 17.6 2.0 16.3
10,000 to 49,999 lbs 26.8 4.5 18.9 2.9 14.2 3.3 14.5
50,000 to 99,999 lbs 46.4 4.4 20.5 4.1 13.1 2.2 21.4
100,000 lbs or more 27.9 0.9 24.2 3.8 25.7 2.2 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 17.3 20.6 18.9 8.5
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 27.3
10,000 to 49,999 lbs 47.8 7.4 S S S S 25.2
50,000 to 99,999 lbs 45.0 1.0 44.6 0.6 45.8 0.5 23.7
100,000 lbs or more 22.0 8.0 22.1 3.6 20.6 4.4 7.0

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 40.2 4.6
Less than 50 lbs 35.4 7.5 25.0 5.9 28.2 4.4 5.4
50 to 99 lbs 32.8 3.7 40.7 3.2 S S 22.2
100 to 499 lbs 39.2 12.9 29.3 4.5 29.0 4.1 11.1
500 to 749 lbs S S S S S S 27.5
750 to 999 lbs S S 35.5 1.8 42.1 2.6 26.8
1,000 to 9,999 lbs 38.2 7.2 32.9 13.7 34.5 10.9 15.4
10,000 to 49,999 lbs S S S S S S 21.6
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 34.7

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 18.7 20.0 23.1 10.9
Less than 50 lbs 19.6 4.8 20.2 2.0 32.1 1.5 11.7
50 to 99 lbs 29.6 1.8 31.7 1.2 48.6 1.1 14.4
100 to 499 lbs 29.5 4.2 22.0 3.5 27.5 1.8 22.2
500 to 749 lbs 47.0 0.3 S S 37.8 0.2 S
750 to 999 lbs 47.6 0.3 S S S S 26.7
1,000 to 9,999 lbs 40.3 0.7 S S 49.5 2.4 13.7
10,000 to 49,999 lbs 46.2 1.1 39.8 7.8 37.9 8.5 11.2
50,000 to 99,999 lbs 49.2 0.2 43.9 2.0 S S 9.9
100,000 lbs or more 41.7 0.6 43.9 9.4 46.3 10.2 22.8

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 19.0 20.4 33.3 11.2
Less than 50 lbs 19.6 5.2 20.3 4.0 32.5 8.0 11.8
50 to 99 lbs 29.7 2.1 32.0 2.9 49.7 3.3 14.8
100 to 499 lbs 30.5 4.4 23.1 5.1 33.4 6.1 24.8
500 to 749 lbs 45.5 0.4 S S 44.9 0.9 S
750 to 999 lbs S S 44.1 0.2 S S 39.2
1,000 to 9,999 lbs S S S S S S 31.6
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 28.9 22.4 23.3 3.7
Less than 50 lbs S S 47.8 0.2 49.3 0.1 24.2
50 to 99 lbs S S S S S S 30.6
100 to 499 lbs 43.7 2.4 S S S S 15.7
500 to 749 lbs S S S S S S 36.4
750 to 999 lbs S S S S S S 28.0
1,000 to 9,999 lbs 40.4 4.9 S S 49.6 2.7 12.9
10,000 to 49,999 lbs 46.2 10.2 39.8 8.8 37.9 9.2 11.2
50,000 to 99,999 lbs 49.2 2.9 43.9 3.9 S S 9.9
100,000 lbs or more 41.7 5.4 43.9 10.8 46.3 11.5 22.8

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 34.3 14.8 28.1 40.8
Less than 50 lbs S S 32.9 0.9 S S 48.8
50 to 99 lbs S S 48.0 S S 34.0
100 to 499 lbs S S 35.0 0.2 S S 47.1
500 to 749 lbs 37.6 0.7 40.3 0.3 S S 49.6
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs S S 22.6 8.9 25.2 7.6 18.0
10,000 to 49,999 lbs 41.3 3.6 30.5 7.1 45.2 9.7 S
50,000 to 99,999 lbs 48.3 8.6 S S S S S
100,000 lbs or more 34.3 9.8 32.0 11.7 39.7 11.1 26.4

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.