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 3.9 20.6 8.9 8.9
Less than 50 lbs 13.9 1.9 23.2 13.6 0.1 8.5
50 to 99 lbs 13.8 0.7 24.9 18.3 0.1 17.7
100 to 499 lbs 11.6 1.2 18.6 0.4 13.8 0.3 14.7
500 to 749 lbs 17.6 0.5 14.3 0.2 10.8 0.1 19.7
750 to 999 lbs 17.4 0.4 13.0 0.1 11.3 18.3
1,000 to 9,999 lbs 8.5 1.3 11.4 1.3 11.0 1.2 11.7
10,000 to 49,999 lbs 10.8 3.4 31.5 4.6 13.3 5.2 16.8
50,000 to 99,999 lbs 25.9 1.4 33.4 3.9 37.5 2.7 28.7
100,000 lbs or more 11.0 0.5 18.5 4.9 26.8 6.8 43.5

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 3.6 21.6 10.6 11.1
Less than 50 lbs 34.3 1.7 11.4 18.5 14.8
50 to 99 lbs 22.8 0.6 17.4 25.0 17.3
100 to 499 lbs 11.9 1.4 22.9 0.4 17.3 0.3 15.9
500 to 749 lbs 18.0 0.7 16.5 0.2 12.0 0.1 18.1
750 to 999 lbs 18.0 0.6 14.4 0.1 9.9 18.4
1,000 to 9,999 lbs 8.8 1.8 12.1 1.3 11.3 1.2 12.8
10,000 to 49,999 lbs 11.7 3.5 32.2 4.5 15.1 5.3 16.0
50,000 to 99,999 lbs 26.3 1.6 33.7 4.0 37.9 2.9 28.6
100,000 lbs or more 10.8 0.6 18.1 4.9 28.2 6.9 37.8

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 4.4 27.4 12.4 13.2
Less than 50 lbs 39.6 1.8 11.6 18.6 19.9
50 to 99 lbs 25.9 0.7 17.2 21.8 19.9
100 to 499 lbs 12.5 1.6 23.1 0.5 18.1 0.5 15.6
500 to 749 lbs 18.5 0.8 16.6 0.3 12.0 0.3 18.0
750 to 999 lbs 18.0 0.6 14.5 0.1 10.0 0.2 18.4
1,000 to 9,999 lbs 8.8 2.0 12.1 1.9 11.3 1.7 12.7
10,000 to 49,999 lbs 11.7 3.4 32.5 3.8 13.2 2.2 16.6
50,000 to 99,999 lbs 25.5 1.5 35.9 4.2 34.2 2.5 30.6
100,000 lbs or more 20.2 0.1 44.4 1.4 41.1 1.3 21.5

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 28.6 47.6 39.5 41.2
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs S S S S S S 34.8
100 to 499 lbs S S S S S S 30.4
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs S S S S S S 32.6
1,000 to 9,999 lbs 41.8 0.9 37.6 0.2 43.1 0.1 32.5
10,000 to 49,999 lbs 41.4 6.8 45.1 3.1 S S 10.3
50,000 to 99,999 lbs S S S S S S 49.9
100,000 lbs or more 24.7 7.6 44.9 3.3 S S S

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 17.5 25.6 25.2 7.5
Less than 50 lbs 45.3 6.3 24.3 28.2 9.1
50 to 99 lbs 34.1 3.8 33.0 40.3 12.6
100 to 499 lbs 43.6 5.0 40.9 0.1 43.8 0.3 13.9
500 to 749 lbs S S 42.7 48.1 20.9
750 to 999 lbs 42.7 0.2 S S 49.6 24.6
1,000 to 9,999 lbs 30.9 1.0 34.8 0.1 42.7 0.5 13.5
10,000 to 49,999 lbs S S S S S S 28.2
50,000 to 99,999 lbs S S S S S S 34.8
100,000 lbs or more 30.1 9.3 27.8 7.5 27.5 8.0 37.8

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 17.8 28.7 24.8 7.7
Less than 50 lbs 18.4 3.7 32.3 2.0 16.6 1.2 6.9
50 to 99 lbs 20.4 1.5 40.0 1.4 23.1 1.0 21.1
100 to 499 lbs 30.2 2.9 39.4 3.5 13.0 1.7 23.1
500 to 749 lbs 37.7 0.3 S S 38.8 0.8 37.8
750 to 999 lbs 44.7 0.4 S S S S 25.1
1,000 to 9,999 lbs 27.1 0.8 40.0 0.9 41.9 1.8 S
10,000 to 49,999 lbs 44.9 2.9 40.4 8.6 27.1 8.8 14.0
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

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 17.7 38.0 15.6 7.8
Less than 50 lbs 18.4 3.8 32.3 2.4 16.6 2.9 7.0
50 to 99 lbs 20.4 1.6 40.0 1.4 23.1 1.8 21.1
100 to 499 lbs 30.3 3.4 39.5 1.8 12.8 1.9 23.1
500 to 749 lbs 38.3 0.3 S S 39.9 2.3 40.9
750 to 999 lbs 45.5 0.5 S S S S 23.1
1,000 to 9,999 lbs S S S S S S 36.6
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 36.1 37.0 28.7 32.4
Less than 50 lbs S S S S S S 28.1
50 to 99 lbs
100 to 499 lbs S S 46.8 41.8 35.6
500 to 749 lbs S S S S S S 32.7
750 to 999 lbs S S S S S S 30.9
1,000 to 9,999 lbs 30.8 4.2 42.7 1.8 42.3 2.2 48.4
10,000 to 49,999 lbs 44.9 9.4 40.4 16.3 27.1 12.9 14.0
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

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 14.8 35.7 31.9 S
Less than 50 lbs 24.5 3.1 39.8 0.6 30.3 0.7 S
50 to 99 lbs 49.3 1.3 35.3 0.7 35.3 34.7
100 to 499 lbs 40.7 3.3 34.2 2.2 38.9 1.0 S
500 to 749 lbs S S 48.0 1.0 S S 23.4
750 to 999 lbs 39.2 0.3 45.2 0.9 S S 30.3
1,000 to 9,999 lbs 27.4 7.9 48.0 11.0 37.7 9.7 S
10,000 to 49,999 lbs 36.4 6.2 S S 38.7 11.3 35.4
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more S S S S 46.1 6.3 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.