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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 12.7 – 29.8 – 28.2 – 13.6
Less than 50 lbs 41.3 3.3 46.8 – 44.8 0.3 11.2
50 to 99 lbs 30.9 0.9 S S 29.4 – 49.3
100 to 499 lbs 35.5 3.1 S S 42.1 0.9 44.9
500 to 749 lbs 40.7 1.3 49.6 0.7 45.0 0.5 42.0
750 to 999 lbs 38.0 0.6 33.4 0.3 46.3 0.3 26.0
1,000 to 9,999 lbs 20.5 2.5 16.9 1.6 27.2 2.2 14.1
10,000 to 49,999 lbs 14.3 5.4 18.0 6.7 19.6 5.8 8.1
50,000 to 99,999 lbs S S 44.4 3.9 41.7 2.1 34.4
100,000 lbs or more S S S S S S 23.6

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 14.0 – 30.9 – 29.3 – 23.8
Less than 50 lbs 28.3 0.8 S S 41.1 – 24.1
50 to 99 lbs 34.2 0.6 S S 33.7 – S
100 to 499 lbs 36.2 3.8 S S 41.1 0.8 46.1
500 to 749 lbs 38.1 1.2 S S 48.1 0.5 43.0
750 to 999 lbs 38.8 0.6 34.0 0.3 46.3 0.3 25.7
1,000 to 9,999 lbs 20.8 2.5 18.0 1.8 27.9 2.2 13.3
10,000 to 49,999 lbs 14.6 5.3 19.1 6.9 20.5 6.1 8.8
50,000 to 99,999 lbs S S 45.4 4.2 41.8 2.2 34.1
100,000 lbs or more S S S S S S 23.6

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 14.2 – 17.8 – 21.8 – 24.2
Less than 50 lbs 32.7 0.9 S S 48.4 – 15.7
50 to 99 lbs 35.7 0.6 S S 25.3 – S
100 to 499 lbs 35.1 3.8 S S 39.1 0.7 47.2
500 to 749 lbs 38.1 1.2 S S 48.2 0.5 43.2
750 to 999 lbs 39.5 0.6 34.3 0.3 47.1 0.3 26.3
1,000 to 9,999 lbs 20.8 2.5 18.0 1.5 28.0 2.1 13.3
10,000 to 49,999 lbs 14.6 5.8 19.1 3.9 20.6 3.3 8.8
50,000 to 99,999 lbs 45.7 1.1 46.2 4.5 46.0 2.2 33.4
100,000 lbs or more 34.4 0.2 35.0 0.8 S S 31.4

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 S S S S S S 26.7
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 – – – – – – –
10,000 to 49,999 lbs S S S S S S 31.6
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 26.4

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 S S S S S S 11.7
Less than 50 lbs S S S S S S 22.2
50 to 99 lbs S S S S S S 29.8
100 to 499 lbs S S S S S S 24.5
500 to 749 lbs S S S S S S 30.2
750 to 999 lbs S S S S S S 28.6
1,000 to 9,999 lbs S S S S S S 28.1
10,000 to 49,999 lbs – – – – – – –
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more – – – – – – –

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 33.4 – 27.7 – 21.2 – 14.2
Less than 50 lbs 44.3 11.9 S S 49.0 12.6 13.7
50 to 99 lbs 32.6 4.3 43.9 4.4 31.4 3.0 43.1
100 to 499 lbs S S S S S S 10.0
500 to 749 lbs S S S S S S 32.3
750 to 999 lbs S S S S S S 36.8
1,000 to 9,999 lbs – – – – – – –
10,000 to 49,999 lbs S S 47.5 14.9 S S 26.8
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more – – – – – – –

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 34.2 – 39.6 – 37.3 – 12.2
Less than 50 lbs 44.3 9.7 S S 49.1 11.4 11.8
50 to 99 lbs 32.6 4.4 43.9 5.1 31.4 5.7 43.1
100 to 499 lbs S S S S S S 10.0
500 to 749 lbs S S S S S S 32.3
750 to 999 lbs S S S S S S 36.8
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 S S 47.4 – S S 26.5
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs – – – – – – –
100 to 499 lbs – – – – – – –
500 to 749 lbs – – – – – – –
750 to 999 lbs – – – – – – –
1,000 to 9,999 lbs – – – – – – –
10,000 to 49,999 lbs S S 47.5 – S S 26.8
50,000 to 99,999 lbs – – – – – – –
100,000 lbs or more – – – – – – –

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 43.5 – 36.2 – 42.7 – S
Less than 50 lbs S S S S S S S
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 26.6
500 to 749 lbs S S S S S S 29.8
750 to 999 lbs S S S S S S 28.6
1,000 to 9,999 lbs S S S S S S 31.7
10,000 to 49,999 lbs 48.0 16.8 42.6 14.3 41.4 14.9 31.7
50,000 to 99,999 lbs S S S S S S 29.8
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.