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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 3.0 – 9.0 – 21.0 – 15.9
Less than 50 lbs 25.5 2.8 S S S S 14.2
50 to 99 lbs 20.3 0.6 27.6 – 20.5 – 39.6
100 to 499 lbs 8.4 0.7 31.8 0.4 19.7 0.1 48.6
500 to 749 lbs 15.2 0.7 31.6 0.3 10.9 – S
750 to 999 lbs 20.4 0.6 32.0 0.2 18.9 0.1 S
1,000 to 9,999 lbs 10.2 2.7 16.5 1.4 12.7 1.6 29.0
10,000 to 49,999 lbs 8.8 2.5 11.3 4.4 14.7 7.0 10.9
50,000 to 99,999 lbs 23.1 0.6 42.1 1.7 34.9 0.4 24.7
100,000 lbs or more 17.1 1.0 17.3 4.6 29.2 8.4 18.5

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 4.4 – 9.3 – 21.2 – 30.7
Less than 50 lbs 29.2 0.8 32.0 – 42.0 – 24.9
50 to 99 lbs 19.3 0.3 32.1 – 21.3 – S
100 to 499 lbs 10.1 1.0 33.0 0.4 22.6 0.1 S
500 to 749 lbs 15.1 0.7 32.5 0.3 11.3 – S
750 to 999 lbs 19.1 0.6 33.1 0.2 18.6 0.1 S
1,000 to 9,999 lbs 11.5 2.5 17.5 1.4 15.9 1.6 30.9
10,000 to 49,999 lbs 8.9 3.0 11.8 4.7 14.8 7.2 11.0
50,000 to 99,999 lbs 24.1 0.7 42.7 1.7 35.0 0.4 25.7
100,000 lbs or more 17.4 1.1 17.7 4.7 29.6 8.4 18.3

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 4.8 – 9.7 – 9.9 – 30.5
Less than 50 lbs 31.6 0.9 32.5 – 44.8 – 22.2
50 to 99 lbs 19.4 0.3 32.4 – 21.7 – S
100 to 499 lbs 10.4 1.2 33.2 0.9 23.2 0.4 S
500 to 749 lbs 14.4 0.7 32.6 0.6 11.8 0.1 S
750 to 999 lbs 19.1 0.6 33.1 0.4 18.6 0.2 S
1,000 to 9,999 lbs 11.6 2.5 17.5 2.6 15.9 2.3 30.7
10,000 to 49,999 lbs 8.8 3.1 11.9 3.4 15.0 4.4 11.0
50,000 to 99,999 lbs 22.7 0.7 44.3 2.8 38.3 1.7 25.5
100,000 lbs or more 49.9 1.1 34.8 2.1 S S 26.5

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 14.0 – 25.1 – 35.1 – 12.9
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 31.6
10,000 to 49,999 lbs S S 48.8 0.3 35.8 0.8 37.5
50,000 to 99,999 lbs S S S S S S 31.0
100,000 lbs or more 13.5 3.0 25.2 0.5 35.3 0.8 12.4

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 49.1 – S S S S 6.9
Less than 50 lbs 32.5 8.2 32.0 3.2 34.7 2.7 8.3
50 to 99 lbs S S S S S S 22.4
100 to 499 lbs S S S S S S 19.1
500 to 749 lbs S S S S S S 32.6
750 to 999 lbs – – – – – – –
1,000 to 9,999 lbs S S S S S S 25.6
10,000 to 49,999 lbs S S S S S S 31.6
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more S S S S S S 28.5

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 19.5 – S S 49.5 – 11.2
Less than 50 lbs 27.9 7.1 S S S S 11.4
50 to 99 lbs 31.6 4.6 20.3 2.7 34.2 2.3 13.6
100 to 499 lbs 17.5 3.9 26.6 4.8 40.3 5.2 14.4
500 to 749 lbs 26.4 1.2 21.5 1.9 28.3 1.4 33.6
750 to 999 lbs S S S S S S 25.7
1,000 to 9,999 lbs S S S S S S 31.9
10,000 to 49,999 lbs 44.8 0.6 44.7 10.2 46.1 14.0 26.0
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more 49.3 0.7 S S S S 24.6

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 20.0 – S S S S 11.3
Less than 50 lbs 27.9 6.9 S S S S 11.4
50 to 99 lbs 31.6 4.6 20.3 2.7 34.2 3.2 13.6
100 to 499 lbs 17.5 4.3 26.6 5.3 40.3 4.7 14.4
500 to 749 lbs 26.4 1.3 21.5 3.7 28.3 4.0 33.6
750 to 999 lbs S S S S S S 25.7
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 34.4 – S S S S 22.6
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 31.6
10,000 to 49,999 lbs 44.8 12.8 44.7 16.8 46.1 16.6 26.0
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more 49.3 13.2 S S S S 24.6

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 32.0 – S S S S 28.4
Less than 50 lbs 41.8 1.5 35.8 0.3 36.8 – 39.1
50 to 99 lbs S S 45.0 0.1 37.8 – S
100 to 499 lbs 44.8 4.1 42.3 1.1 32.3 2.8 S
500 to 749 lbs 48.5 1.7 S S 44.4 0.5 S
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs S S S S S S 17.9
10,000 to 49,999 lbs 45.6 9.4 S S S S S
50,000 to 99,999 lbs 31.7 7.7 32.9 13.2 S S 44.4
100,000 lbs or more S S S S S S 30.3

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.