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 12.4 27.6 25.9 15.3
Less than 50 lbs 18.3 3.5 30.8 22.1 0.6 12.3
50 to 99 lbs 13.6 0.6 43.6 26.1 0.3 44.6
100 to 499 lbs 19.5 4.0 13.7 0.7 16.5 1.4 13.6
500 to 749 lbs 18.9 0.5 17.8 0.3 14.6 0.2 20.5
750 to 999 lbs 19.1 0.3 17.5 0.2 19.5 0.2 19.5
1,000 to 9,999 lbs 11.4 1.2 15.9 2.9 13.4 2.5 9.4
10,000 to 49,999 lbs 35.8 5.9 38.3 5.6 36.0 5.5 16.0
50,000 to 99,999 lbs 24.1 1.3 20.8 4.4 31.8 2.0 20.9
100,000 lbs or more S S S S S S S

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 14.5 27.0 26.4 20.1
Less than 50 lbs 18.2 2.9 46.7 37.9 0.2 19.9
50 to 99 lbs 16.8 0.4 S S 34.9 0.2 S
100 to 499 lbs 23.0 5.0 15.2 0.7 17.5 1.2 14.9
500 to 749 lbs 19.0 0.5 18.1 0.3 16.3 0.2 19.6
750 to 999 lbs 11.5 0.2 17.4 0.2 13.4 0.1 24.1
1,000 to 9,999 lbs 11.3 1.7 12.9 3.1 13.1 2.8 9.1
10,000 to 49,999 lbs 36.2 6.0 37.0 5.7 36.2 5.5 15.3
50,000 to 99,999 lbs 24.0 1.6 20.9 4.4 31.9 2.0 21.2
100,000 lbs or more S S S S S S S

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 19.3 27.2 28.3 19.9
Less than 50 lbs 17.6 1.9 49.4 41.3 36.4
50 to 99 lbs 21.3 0.4 S S 15.7 S
100 to 499 lbs 20.6 2.2 15.5 0.7 24.4 1.3 22.4
500 to 749 lbs 21.5 0.6 18.1 0.3 16.5 0.2 19.4
750 to 999 lbs 11.5 0.2 17.4 0.2 13.6 0.2 24.3
1,000 to 9,999 lbs 11.4 2.1 12.9 3.1 13.6 2.9 9.3
10,000 to 49,999 lbs 36.3 5.9 37.1 5.6 36.2 5.4 15.2
50,000 to 99,999 lbs 24.1 1.9 20.9 4.4 32.0 2.1 21.2
100,000 lbs or more S S S S S S 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 S S S S S S 24.7
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 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 30.5

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 24.3 S S S S 6.6
Less than 50 lbs 30.6 11.9 S S S S 8.1
50 to 99 lbs 36.0 1.1 S S S S 13.9
100 to 499 lbs 37.9 12.7 40.8 13.3 42.5 13.9 8.2
500 to 749 lbs S S 36.3 1.6 44.7 1.8 25.6
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 27.6
10,000 to 49,999 lbs S S S S S S 32.5
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 31.6

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 20.2 16.7 6.5
Less than 50 lbs 20.4 3.9 19.3 4.3 22.7 7.1 6.8
50 to 99 lbs 27.3 3.3 32.0 3.6 32.0 3.1 15.6
100 to 499 lbs 33.7 3.4 36.1 5.5 27.6 6.6 13.3
500 to 749 lbs 48.7 0.6 S S S S S
750 to 999 lbs S S S S S S 42.9
1,000 to 9,999 lbs S S S S S S 29.9
10,000 to 49,999 lbs S S S S S S 30.0
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 18.9 22.9 20.0 6.5
Less than 50 lbs 20.5 3.9 19.4 3.9 22.5 5.7 6.8
50 to 99 lbs 27.3 3.3 32.0 3.6 32.0 3.0 15.7
100 to 499 lbs 33.7 3.4 36.2 5.1 27.8 6.0 13.1
500 to 749 lbs 48.9 0.6 S S S S S
750 to 999 lbs S S S S S S 42.9
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 S S S S S S 25.3
Less than 50 lbs S S S S S S 31.9
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 31.6
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 27.9
10,000 to 49,999 lbs S S S S S S 30.0
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 S S S S 30.7 S
Less than 50 lbs S S 38.7 0.7 S S S
50 to 99 lbs 41.1 1.4 45.4 0.4 S S S
100 to 499 lbs 40.1 3.9 41.8 2.5 S S S
500 to 749 lbs S S S S S S S
750 to 999 lbs S S S S S S 29.8
1,000 to 9,999 lbs 39.2 8.7 S S 42.1 9.9 S
10,000 to 49,999 lbs S S S S 39.2 10.6 S
50,000 to 99,999 lbs S S S S S S 32.9
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.