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 4.7 11.3 13.4 9.3
Less than 50 lbs 13.6 1.9 11.9 11.7 0.2 8.6
50 to 99 lbs 37.5 2.1 19.4 19.5 0.1 9.0
100 to 499 lbs 9.7 1.0 20.1 0.5 16.2 0.4 14.2
500 to 749 lbs 9.2 0.5 27.0 0.3 16.8 0.2 20.0
750 to 999 lbs 14.8 0.5 30.9 0.4 15.4 0.2 25.0
1,000 to 9,999 lbs 10.6 2.3 13.1 1.9 19.5 1.9 12.0
10,000 to 49,999 lbs 15.9 3.5 20.4 4.2 19.6 5.1 21.9
50,000 to 99,999 lbs 13.6 0.5 16.5 1.7 25.4 2.9 13.4
100,000 lbs or more 23.1 1.0 29.3 5.3 25.1 4.1 20.7

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 5.0 11.6 12.1 19.0
Less than 50 lbs 14.9 1.4 10.9 17.4 19.1
50 to 99 lbs S S 20.5 27.0 15.5
100 to 499 lbs 10.9 1.2 21.7 0.5 18.4 0.3 18.3
500 to 749 lbs 10.4 0.6 28.9 0.3 18.0 0.2 23.8
750 to 999 lbs 13.5 0.5 32.0 0.4 17.0 0.2 26.8
1,000 to 9,999 lbs 11.3 2.7 13.1 1.9 20.7 2.2 12.4
10,000 to 49,999 lbs 16.7 4.0 20.8 4.3 17.0 5.3 21.9
50,000 to 99,999 lbs 13.9 0.7 16.5 1.6 26.4 3.1 13.8
100,000 lbs or more 23.1 1.2 29.2 5.3 25.2 4.4 21.7

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 5.6 13.6 13.5 24.5
Less than 50 lbs 13.3 0.8 11.6 26.9 28.4
50 to 99 lbs S S 19.2 29.5 31.5
100 to 499 lbs 11.1 1.4 21.7 0.6 18.9 0.3 18.7
500 to 749 lbs 10.3 0.6 29.0 0.3 18.6 0.3 23.8
750 to 999 lbs 13.7 0.6 32.0 0.4 17.3 0.2 26.9
1,000 to 9,999 lbs 11.2 2.8 13.1 2.0 20.9 2.4 12.7
10,000 to 49,999 lbs 16.9 4.1 20.9 3.7 17.4 4.7 22.1
50,000 to 99,999 lbs 14.0 0.7 16.7 1.9 26.8 3.5 13.9
100,000 lbs or more 24.6 0.5 35.9 3.6 35.1 3.0 21.8

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 33.2 33.9 24.0 13.7
Less than 50 lbs S S S S S S 30.4
50 to 99 lbs S S S S S S 30.9
100 to 499 lbs S S S S S S 31.0
500 to 749 lbs S S S S S S S
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 23.8
10,000 to 49,999 lbs 22.8 9.0 25.3 5.2 25.6 5.7 5.3
50,000 to 99,999 lbs S S S S S S 32.6
100,000 lbs or more S S 35.6 5.3 26.9 5.7 21.3

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 14.1 31.8 28.6 4.8
Less than 50 lbs 28.8 6.6 20.2 0.3 21.6 2.5 4.9
50 to 99 lbs 28.4 3.1 49.8 0.3 S S 10.0
100 to 499 lbs 14.6 2.7 31.8 29.7 2.5 8.6
500 to 749 lbs 37.5 1.3 43.8 42.7 1.6 11.0
750 to 999 lbs S S 44.7 43.4 0.7 12.6
1,000 to 9,999 lbs 45.3 1.9 29.5 0.4 36.5 5.2 12.5
10,000 to 49,999 lbs S S 39.1 0.6 38.9 4.7 40.8
50,000 to 99,999 lbs S S S S S S 31.5
100,000 lbs or more 29.9 8.1 31.9 4.3 S S S

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 12.1 33.1 45.8 5.6
Less than 50 lbs 15.1 1.5 14.4 3.7 14.7 4.3 5.7
50 to 99 lbs 11.3 1.6 20.4 2.3 18.3 2.1 6.7
100 to 499 lbs 18.1 1.7 15.4 3.5 19.9 4.5 7.2
500 to 749 lbs 25.2 1.0 21.9 2.2 33.1 1.7 28.7
750 to 999 lbs 46.1 1.2 S S 31.2 1.0 41.1
1,000 to 9,999 lbs S S S S S S 15.1
10,000 to 49,999 lbs S S S S S S 3.2
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S S

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 12.6 12.7 14.9 5.6
Less than 50 lbs 15.1 1.7 14.4 2.1 14.7 2.6 5.7
50 to 99 lbs 11.3 1.7 20.4 1.6 18.4 1.1 6.7
100 to 499 lbs 18.2 1.6 15.5 2.3 20.2 3.2 7.4
500 to 749 lbs 25.3 1.0 22.5 2.5 34.0 2.1 31.0
750 to 999 lbs 46.2 1.2 S S 33.0 0.9 40.2
1,000 to 9,999 lbs S S S S S S 31.5
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 S S S S S S 2.4
Less than 50 lbs S S S S S S 18.8
50 to 99 lbs S S 49.4 48.9 23.6
100 to 499 lbs 34.3 6.2 30.7 1.3 30.7 1.4 1.0
500 to 749 lbs 49.9 0.5 S S S S 33.0
750 to 999 lbs S S S S S S 26.2
1,000 to 9,999 lbs S S S S S S 10.7
10,000 to 49,999 lbs S S S S S S 3.2
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S S

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 14.6 30.6 20.4 31.8
Less than 50 lbs 30.5 6.2 32.8 0.5 41.5 0.4 32.7
50 to 99 lbs 25.5 1.2 26.2 0.3 28.2 S
100 to 499 lbs 23.8 2.5 26.8 1.1 S S 37.3
500 to 749 lbs 40.3 0.3 22.6 0.2 49.9 0.3 39.4
750 to 999 lbs S S S S 47.4 40.4
1,000 to 9,999 lbs 16.7 6.4 29.3 9.0 19.5 9.1 33.7
10,000 to 49,999 lbs S S 25.1 4.6 38.9 6.6 28.8
50,000 to 99,999 lbs S S 44.9 6.0 40.3 3.7 S
100,000 lbs or more 34.9 0.3 S S 48.6 3.3 32.9

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.