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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 20.4 – 31.3 – 9.1 – 9.7
Less than 50 lbs 12.6 1.8 19.4 0.1 13.4 – 9.4
50 to 99 lbs 18.2 0.6 19.7 – 15.1 – 16.2
100 to 499 lbs 49.0 2.9 19.1 0.4 28.9 0.5 14.3
500 to 749 lbs S S 17.2 0.1 24.9 0.1 17.6
750 to 999 lbs 20.6 0.4 22.5 0.2 27.9 0.2 12.4
1,000 to 9,999 lbs 12.7 3.3 14.1 2.0 31.7 3.1 16.5
10,000 to 49,999 lbs 28.5 3.1 48.2 7.2 19.8 4.2 S
50,000 to 99,999 lbs 16.9 1.4 29.8 5.3 14.8 2.1 32.5
100,000 lbs or more 12.2 0.7 14.6 3.8 6.6 2.4 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 24.2 – 31.9 – 7.5 – 17.5
Less than 50 lbs 23.6 1.9 26.5 – 27.0 – 14.8
50 to 99 lbs 29.7 0.4 19.6 – 22.8 – 47.8
100 to 499 lbs S S 18.9 0.3 31.9 0.6 15.4
500 to 749 lbs S S 16.4 0.1 24.4 0.1 17.8
750 to 999 lbs 21.5 0.5 20.7 0.2 26.6 0.3 12.2
1,000 to 9,999 lbs 12.0 3.3 14.6 2.1 32.9 4.0 17.4
10,000 to 49,999 lbs 29.7 3.3 49.1 7.3 21.9 5.4 S
50,000 to 99,999 lbs 17.0 1.8 30.1 5.3 18.2 2.7 30.5
100,000 lbs or more 14.6 0.9 15.8 4.0 7.5 2.7 22.3

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 22.3 – 34.7 – 12.9 – 13.1
Less than 50 lbs 16.9 0.8 27.1 – 26.4 – 23.5
50 to 99 lbs 33.3 0.3 20.2 – 20.7 – 39.5
100 to 499 lbs 40.2 2.0 18.4 0.4 31.7 0.8 17.0
500 to 749 lbs S S 16.4 0.2 24.2 0.2 17.8
750 to 999 lbs 21.6 0.6 20.7 0.2 26.6 0.4 12.2
1,000 to 9,999 lbs 12.1 3.8 15.3 2.2 13.9 2.4 17.4
10,000 to 49,999 lbs 30.8 3.7 49.6 7.3 26.6 6.7 S
50,000 to 99,999 lbs 17.8 1.8 30.6 5.6 21.3 4.1 14.9
100,000 lbs or more 26.4 0.5 35.1 2.0 30.9 3.4 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 25.1 – 31.9 – 17.5 – 19.1
Less than 50 lbs S S S S S S 32.7
50 to 99 lbs – – – – – – –
100 to 499 lbs – – – – – – –
500 to 749 lbs – – – – – – –
750 to 999 lbs – – – – – – –
1,000 to 9,999 lbs 46.8 0.2 S S S S 28.0
10,000 to 49,999 lbs 42.8 6.1 36.5 3.4 41.8 4.8 18.8
50,000 to 99,999 lbs S S S S S S 30.3
100,000 lbs or more 25.8 7.8 32.8 4.1 15.6 7.4 22.2

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 45.6 – 22.2 – S S 6.3
Less than 50 lbs 34.8 10.1 38.1 2.1 43.4 6.7 6.5
50 to 99 lbs S S 45.4 – S S 19.3
100 to 499 lbs S S 47.3 0.7 48.2 8.3 10.9
500 to 749 lbs S S S S S S 28.3
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs 41.1 0.8 S S S S 22.9
10,000 to 49,999 lbs S S S S S S S
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S 29.9 15.5 42.7 12.3 25.4

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 8.4 – 23.0 – 26.7 – 8.5
Less than 50 lbs 6.8 3.2 13.9 4.0 13.1 3.6 9.2
50 to 99 lbs 13.8 1.9 21.4 0.9 16.1 0.6 12.8
100 to 499 lbs 21.5 3.1 15.7 2.3 19.2 2.7 19.4
500 to 749 lbs 35.7 0.6 49.1 0.5 39.7 0.2 30.6
750 to 999 lbs S S S S S S 24.9
1,000 to 9,999 lbs 38.7 0.2 36.5 0.6 38.3 0.7 16.6
10,000 to 49,999 lbs 34.0 1.7 26.6 5.9 29.0 7.2 4.3
50,000 to 99,999 lbs S S S S S S 25.1
100,000 lbs or more S S 39.5 6.6 33.9 5.6 20.3

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 7.9 – 15.2 – 13.7 – 8.7
Less than 50 lbs 6.8 3.2 13.8 4.0 13.1 4.2 9.4
50 to 99 lbs 13.8 2.0 21.4 2.1 16.1 2.7 12.8
100 to 499 lbs 22.3 3.4 15.0 3.2 19.4 3.8 19.1
500 to 749 lbs 35.7 0.6 49.7 2.3 40.8 1.7 31.7
750 to 999 lbs S S S S S S 25.1
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 29.5 – 25.1 – 28.5 – 7.5
Less than 50 lbs S S S S S S 29.8
50 to 99 lbs – – – – – – –
100 to 499 lbs S S S S S S S
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs S S S S S S 29.9
1,000 to 9,999 lbs 38.7 3.8 36.5 0.7 38.3 0.7 16.6
10,000 to 49,999 lbs 34.0 9.2 26.6 9.0 29.0 9.9 4.3
50,000 to 99,999 lbs S S S S S S 25.1
100,000 lbs or more S S 39.5 7.7 33.9 6.3 20.3

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 40.6 – 27.1 – S S S
Less than 50 lbs S S S S 48.2 1.4 S
50 to 99 lbs 36.4 1.2 44.3 0.6 40.9 0.8 S
100 to 499 lbs S S S S 41.0 1.0 S
500 to 749 lbs S S S S S S S
750 to 999 lbs S S S S S S 48.8
1,000 to 9,999 lbs S S 42.8 10.9 29.8 14.2 S
10,000 to 49,999 lbs 45.8 9.4 S S S S S
50,000 to 99,999 lbs S S S S S S 31.7
100,000 lbs or more S S S S S S 30.4

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.