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 8.7 9.6 8.7 10.5
Less than 50 lbs 19.3 1.0 12.2 15.2 11.9
50 to 99 lbs 34.6 0.4 17.2 21.3 25.8
100 to 499 lbs 22.4 1.4 18.6 0.2 12.4 0.1 23.0
500 to 749 lbs 22.3 0.3 17.0 13.2 20.9
750 to 999 lbs 45.9 0.8 14.4 14.5 34.0
1,000 to 9,999 lbs 13.5 1.4 12.9 0.8 17.0 1.2 10.4
10,000 to 49,999 lbs 11.0 3.9 14.9 4.6 9.8 4.4 11.7
50,000 to 99,999 lbs 37.5 1.0 25.7 3.6 19.0 1.3 23.6
100,000 lbs or more 6.2 0.5 14.1 4.1 22.0 4.7 8.4

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 8.4 9.3 8.9 13.2
Less than 50 lbs 39.6 1.1 18.7 27.5 32.9
50 to 99 lbs 49.8 0.3 17.9 24.4 35.2
100 to 499 lbs 24.2 1.4 18.2 0.2 12.5 25.6
500 to 749 lbs 24.0 0.3 17.6 15.6 20.9
750 to 999 lbs 47.1 0.8 14.4 15.5 16.8
1,000 to 9,999 lbs 12.4 1.3 13.0 0.8 15.8 1.1 9.9
10,000 to 49,999 lbs 9.7 3.9 14.3 4.7 9.7 4.5 11.0
50,000 to 99,999 lbs 38.0 1.1 25.9 3.7 18.7 1.4 23.6
100,000 lbs or more 5.5 0.5 15.1 4.3 22.8 4.9 8.2

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 8.6 11.4 12.6 12.2
Less than 50 lbs 28.3 0.5 20.3 33.3 34.9
50 to 99 lbs 15.0 18.0 19.5 38.3
100 to 499 lbs 11.1 0.5 18.2 0.2 13.0 0.1 28.1
500 to 749 lbs 24.0 0.3 17.6 15.6 20.9
750 to 999 lbs 47.3 1.0 14.4 15.6 0.1 16.7
1,000 to 9,999 lbs 12.5 1.6 13.0 1.2 16.1 1.8 10.5
10,000 to 49,999 lbs 9.7 3.3 14.4 4.5 9.7 4.7 11.0
50,000 to 99,999 lbs 39.6 1.2 26.3 4.2 21.8 2.0 25.2
100,000 lbs or more 23.4 0.4 40.9 3.5 S S 47.4

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 10.3 15.1 15.9 6.6
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 S S S S S S 39.8
10,000 to 49,999 lbs S S 34.7 0.9 S S 42.7
50,000 to 99,999 lbs 16.2 0.6 28.6 0.6 19.1 0.4 20.1
100,000 lbs or more 11.8 2.3 15.3 1.3 16.2 0.6 6.6

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 24.3
Less than 50 lbs S S S S S S 26.2
50 to 99 lbs S S S S S S 27.0
100 to 499 lbs S S 46.7 8.2 S S 22.0
500 to 749 lbs S S S S S S 26.0
750 to 999 lbs S S S S S S 28.0
1,000 to 9,999 lbs S S S S S S 29.7
10,000 to 49,999 lbs S S S S S S 31.5
50,000 to 99,999 lbs S S S S S S 33.3
100,000 lbs or more 49.2 13.6 S S S S 34.9

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 8.7 45.1 25.8 6.8
Less than 50 lbs 13.0 5.3 14.2 6.9 17.4 6.9 6.5
50 to 99 lbs 44.8 4.1 29.0 2.4 23.9 2.0 25.2
100 to 499 lbs 19.2 1.8 13.3 5.3 18.4 4.4 16.6
500 to 749 lbs S S S S S S S
750 to 999 lbs 44.8 0.4 S S S S 31.2
1,000 to 9,999 lbs S S S S S S 30.0
10,000 to 49,999 lbs 43.8 5.7 35.0 12.8 36.0 13.8 23.4
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 30.4

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 11.9 9.8 11.1 7.1
Less than 50 lbs 13.1 4.5 14.3 4.2 17.4 5.2 6.7
50 to 99 lbs 44.8 4.2 29.0 4.6 23.9 3.5 25.2
100 to 499 lbs 19.3 2.1 13.5 5.1 19.3 5.3 16.3
500 to 749 lbs S S S S S S 22.4
750 to 999 lbs S S S S S S 39.6
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 32.1 S S 29.1 48.8
Less than 50 lbs S S S S S S S
50 to 99 lbs
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 S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 30.0
10,000 to 49,999 lbs 43.8 14.3 35.0 16.5 36.0 13.8 23.4
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 30.4

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 42.0 42.5 31.5 S
Less than 50 lbs S S S S 49.9 S
50 to 99 lbs S S S S S S 45.9
100 to 499 lbs 45.4 2.5 S S S S S
500 to 749 lbs S S S S S S S
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S 44.8 5.3 30.4 5.0 S
50,000 to 99,999 lbs S S 46.2 3.2 S S 26.8
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.