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 7.6 9.8 11.8 13.2
Less than 50 lbs 17.2 3.3 33.4 0.1 32.4 0.5 11.0
50 to 99 lbs 18.7 1.2 24.0 24.7 0.1 23.0
100 to 499 lbs 13.3 1.5 21.5 0.3 17.1 0.6 18.2
500 to 749 lbs 13.5 0.7 19.0 0.1 19.2 0.1 29.1
750 to 999 lbs 25.1 0.9 17.3 0.1 30.3 0.2 22.3
1,000 to 9,999 lbs 19.5 3.5 12.2 1.6 27.6 3.1 19.5
10,000 to 49,999 lbs 11.9 1.2 17.1 4.2 15.8 5.1 27.0
50,000 to 99,999 lbs 23.3 0.8 16.4 3.2 26.7 2.0 21.0
100,000 lbs or more 18.3 1.5 18.2 5.5 27.8 5.8 20.2

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 10.0 10.1 13.5 25.2
Less than 50 lbs 20.2 2.0 31.0 47.7 24.3
50 to 99 lbs 32.0 1.4 24.4 46.2 30.7
100 to 499 lbs 16.6 1.4 23.5 0.3 18.6 0.3 14.3
500 to 749 lbs 16.7 0.9 20.3 0.1 25.4 0.1 39.6
750 to 999 lbs 24.9 1.1 17.0 0.1 30.3 0.2 20.1
1,000 to 9,999 lbs 20.7 3.8 13.0 1.8 29.1 3.3 19.9
10,000 to 49,999 lbs 12.5 1.0 17.1 4.1 17.1 5.4 27.2
50,000 to 99,999 lbs 23.5 1.1 16.5 3.2 27.2 2.2 20.9
100,000 lbs or more 18.6 1.9 19.1 5.3 29.7 5.7 21.7

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 10.0 11.5 13.4 13.0
Less than 50 lbs 20.7 2.0 30.0 26.2 24.1
50 to 99 lbs 24.6 1.2 25.2 32.6 28.6
100 to 499 lbs 11.1 1.3 23.7 0.4 19.1 0.4 16.1
500 to 749 lbs 16.1 1.0 20.3 0.1 27.1 0.4 41.9
750 to 999 lbs 20.8 0.8 16.0 0.1 19.1 0.1 25.5
1,000 to 9,999 lbs 21.8 4.3 13.0 2.4 30.2 3.9 20.8
10,000 to 49,999 lbs 13.0 1.6 17.2 5.0 17.7 4.0 28.3
50,000 to 99,999 lbs 23.4 1.3 16.6 3.2 25.8 3.1 18.9
100,000 lbs or more 19.6 0.4 34.8 5.5 31.9 1.9 49.5

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 25.5 23.5 21.2 12.9
Less than 50 lbs S S S S S S 31.6
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
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 28.3
10,000 to 49,999 lbs 45.6 6.1 38.5 3.0 34.8 6.2 19.1
50,000 to 99,999 lbs S S S S S S 24.6
100,000 lbs or more 30.1 12.0 25.8 4.9 23.8 9.6 14.3

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 22.0 25.3 41.3 9.7
Less than 50 lbs 36.3 3.4 S S S S 8.7
50 to 99 lbs 44.9 2.9 S S S S 11.7
100 to 499 lbs 42.4 3.7 33.4 38.8 1.8 8.6
500 to 749 lbs S S 31.5 36.2 0.2 20.8
750 to 999 lbs 45.3 3.3 S S S S 16.8
1,000 to 9,999 lbs 31.5 2.8 S S 43.8 2.6 24.3
10,000 to 49,999 lbs S S 42.0 0.3 42.7 7.9 25.0
50,000 to 99,999 lbs S S S S S S 31.5
100,000 lbs or more 23.4 9.5 25.5 0.6 45.9 12.1 S

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 20.3 21.9 18.5 7.3
Less than 50 lbs 20.2 4.3 33.5 3.8 32.3 4.1 7.7
50 to 99 lbs 27.6 1.9 30.0 0.7 25.9 0.8 15.5
100 to 499 lbs 38.2 3.1 24.0 3.0 32.7 3.8 9.6
500 to 749 lbs 31.0 0.7 31.9 1.2 33.9 1.3 16.2
750 to 999 lbs S S 40.8 1.8 49.7 1.8 24.8
1,000 to 9,999 lbs 18.7 13.4 0.4 13.7 0.5 4.0
10,000 to 49,999 lbs 14.8 0.2 14.7 4.2 14.2 6.3 15.8
50,000 to 99,999 lbs 43.7 45.5 2.2 S S 26.5
100,000 lbs or more 41.3 47.9 3.5 49.4 2.7 27.0

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 20.6 23.6 24.7 7.3
Less than 50 lbs 20.2 4.4 33.5 4.9 32.4 5.9 7.7
50 to 99 lbs 27.6 2.0 30.0 1.1 25.9 1.8 15.5
100 to 499 lbs 38.3 3.1 23.3 3.5 31.7 4.3 9.5
500 to 749 lbs 33.1 0.7 40.4 1.6 40.4 1.8 18.9
750 to 999 lbs S S 47.4 2.7 S S 26.7
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 15.3 24.5 17.1 8.1
Less than 50 lbs S S S S S S 25.1
50 to 99 lbs S S S S S S 24.4
100 to 499 lbs S S S S S S 15.3
500 to 749 lbs S S S S S S 20.4
750 to 999 lbs S S S S S S 25.8
1,000 to 9,999 lbs 18.7 2.4 13.4 8.3 13.7 8.0 4.0
10,000 to 49,999 lbs 14.8 8.8 14.7 10.9 14.2 10.8 15.8
50,000 to 99,999 lbs 43.7 1.0 45.5 3.0 S S 26.5
100,000 lbs or more 41.3 1.8 47.9 8.7 49.4 6.3 27.0

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 18.2 S S 32.8 S
Less than 50 lbs 31.7 5.8 S S 32.5 S
50 to 99 lbs S S S S S S S
100 to 499 lbs 28.5 2.3 S S S S S
500 to 749 lbs S S S S S S S
750 to 999 lbs S S 49.4 0.3 S S 30.3
1,000 to 9,999 lbs 27.8 7.5 21.1 7.1 38.5 6.2 28.0
10,000 to 49,999 lbs 26.8 6.6 S S 30.0 14.6 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 43.5

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.