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 5.0 11.8 13.5 15.2
Less than 50 lbs 19.5 1.4 10.6 5.6 16.3
50 to 99 lbs 14.4 0.3 16.8 11.8 33.8
100 to 499 lbs 8.3 0.6 18.3 0.2 13.9 0.1 19.1
500 to 749 lbs 12.1 0.3 15.7 12.5 15.7
750 to 999 lbs 25.8 0.6 25.8 0.1 12.4 27.3
1,000 to 9,999 lbs 6.3 1.7 14.7 1.5 6.3 0.9 11.4
10,000 to 49,999 lbs 5.0 2.2 14.8 3.0 6.3 5.0 14.2
50,000 to 99,999 lbs 29.9 0.7 43.6 2.5 31.1 1.6 17.1
100,000 lbs or more 28.1 0.6 15.3 3.8 31.9 6.9 28.3

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 4.0 12.5 16.5 12.0
Less than 50 lbs 17.8 0.5 19.8 12.1 16.8
50 to 99 lbs 18.1 0.2 20.7 18.2 30.0
100 to 499 lbs 9.5 0.7 18.8 0.2 15.1 0.2 22.3
500 to 749 lbs 13.1 0.3 17.7 12.9 16.2
750 to 999 lbs 26.1 0.7 27.5 0.1 9.9 26.6
1,000 to 9,999 lbs 5.2 1.7 14.2 1.7 7.0 1.3 11.7
10,000 to 49,999 lbs 5.3 2.3 14.6 2.9 6.5 5.6 13.9
50,000 to 99,999 lbs 30.1 0.9 43.7 2.5 31.1 1.7 17.7
100,000 lbs or more 22.8 0.4 18.8 4.1 44.7 7.7 29.3

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 3.6 16.1 17.6 12.8
Less than 50 lbs 17.7 0.5 19.9 13.6 16.7
50 to 99 lbs 19.5 0.2 20.8 19.8 33.1
100 to 499 lbs 9.7 0.7 18.8 0.2 15.4 0.3 22.4
500 to 749 lbs 13.1 0.3 17.7 0.1 13.2 0.1 16.5
750 to 999 lbs 16.1 0.4 27.2 0.2 9.5 0.1 27.4
1,000 to 9,999 lbs 5.2 1.7 14.2 2.1 7.1 1.6 11.6
10,000 to 49,999 lbs 5.3 2.2 14.6 3.5 6.5 6.4 14.1
50,000 to 99,999 lbs 30.1 0.9 43.8 2.6 31.9 1.7 17.2
100,000 lbs or more 38.4 0.4 49.7 3.5 S S 47.5

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 13.5 28.1 27.3 11.8
Less than 50 lbs S S S S S S 29.9
50 to 99 lbs
100 to 499 lbs S S S S S S 31.6
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 28.4
10,000 to 49,999 lbs 33.6 6.5 34.7 0.8 23.9 3.2 19.8
50,000 to 99,999 lbs 42.4 4.2 32.8 0.5 42.3 2.6 25.9
100,000 lbs or more 20.0 8.1 28.4 1.1 28.4 5.3 17.1

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 44.5 43.3 4.0
Less than 50 lbs 23.1 6.0 23.6 5.4 26.0 4.3 3.6
50 to 99 lbs 26.6 6.9 29.6 3.2 34.3 2.5 18.8
100 to 499 lbs 41.4 4.9 26.7 4.0 30.8 5.7 12.5
500 to 749 lbs S S S S S S 29.4
750 to 999 lbs S S S S S S 46.0
1,000 to 9,999 lbs S S S S S S 24.0
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 44.5 8.3 44.9 18.2 47.4 18.0 20.7

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 18.6 37.8 39.6 11.6
Less than 50 lbs 23.7 3.9 12.3 6.6 7.8 5.9 11.9
50 to 99 lbs 16.4 2.1 19.2 3.5 18.8 3.0 14.1
100 to 499 lbs 13.2 3.0 20.2 5.7 15.6 4.3 14.5
500 to 749 lbs 20.0 0.3 S S S S 17.3
750 to 999 lbs 35.3 0.2 S S S S 24.5
1,000 to 9,999 lbs S S 44.2 0.4 S S 39.2
10,000 to 49,999 lbs 35.0 0.3 39.8 6.5 31.9 10.6 20.5
50,000 to 99,999 lbs
100,000 lbs or more 42.7 0.4 S S S S 23.0

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 18.7 16.7 13.1 11.4
Less than 50 lbs 23.7 4.0 12.3 2.9 7.9 3.2 11.7
50 to 99 lbs 16.4 2.2 19.2 2.6 18.8 2.8 14.2
100 to 499 lbs 13.2 3.0 20.2 3.8 15.8 3.4 14.7
500 to 749 lbs 20.0 0.3 S S S S 17.3
750 to 999 lbs 36.7 0.2 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 25.0 40.6 41.9 22.1
Less than 50 lbs S S S S S S 29.8
50 to 99 lbs S S S S S S 29.8
100 to 499 lbs S S S S S S 30.7
500 to 749 lbs
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S 44.7 2.1 S S 38.7
10,000 to 49,999 lbs 35.0 11.1 39.8 17.7 31.9 19.1 20.5
50,000 to 99,999 lbs
100,000 lbs or more 42.7 11.4 S S S S 23.0

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 28.3 24.7 22.3 S
Less than 50 lbs S S S S 23.6 S
50 to 99 lbs S S 46.2 0.2 23.9 S
100 to 499 lbs 25.5 1.8 34.2 1.0 48.0 0.2 48.7
500 to 749 lbs S S S S 46.6 47.2
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs S S 32.0 11.3 40.3 10.5 38.9
10,000 to 49,999 lbs 21.8 8.8 33.9 10.2 32.3 10.0 S
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more S S S S S S S

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.