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 7.7 15.5 22.6 15.4
Less than 50 lbs 22.9 2.2 41.8 S S 13.5
50 to 99 lbs 15.1 0.3 26.6 26.8 S
100 to 499 lbs 13.9 0.9 27.0 0.2 18.5 0.1 S
500 to 749 lbs 25.0 0.8 29.5 0.1 15.5 S
750 to 999 lbs 16.6 0.3 32.5 0.1 24.3 S
1,000 to 9,999 lbs 14.7 1.7 23.7 1.5 17.5 0.5 S
10,000 to 49,999 lbs 10.5 2.3 31.0 5.4 12.3 2.6 44.9
50,000 to 99,999 lbs 24.5 2.6 17.7 3.9 11.3 1.7 14.7
100,000 lbs or more 17.3 1.8 15.5 4.7 29.1 4.7 9.4

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 9.7 16.1 24.7 21.0
Less than 50 lbs 30.7 0.9 46.5 46.0 25.6
50 to 99 lbs 20.1 0.1 33.5 30.7 S
100 to 499 lbs 18.0 0.8 29.7 0.2 24.6 0.1 S
500 to 749 lbs 23.7 0.7 31.7 0.2 20.1 S
750 to 999 lbs 17.6 0.3 33.4 0.1 25.4 S
1,000 to 9,999 lbs 14.6 1.8 24.4 1.7 18.6 0.7 S
10,000 to 49,999 lbs 11.0 2.0 31.3 5.6 12.0 3.4 47.5
50,000 to 99,999 lbs 25.2 3.3 18.0 3.9 11.0 2.0 14.9
100,000 lbs or more 19.7 1.9 20.4 4.7 32.1 5.5 9.7

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 9.4 19.9 11.4 31.5
Less than 50 lbs 25.7 0.8 46.3 32.8 21.1
50 to 99 lbs 21.7 0.2 34.2 24.6 S
100 to 499 lbs 17.7 0.8 29.5 0.3 22.6 0.2 S
500 to 749 lbs 24.2 0.8 31.8 0.2 18.8 S
750 to 999 lbs 17.6 0.4 33.5 0.2 26.7 S
1,000 to 9,999 lbs 14.8 2.4 24.5 2.1 18.6 1.0 S
10,000 to 49,999 lbs 10.8 2.2 31.6 5.6 11.9 3.0 48.9
50,000 to 99,999 lbs 25.7 3.6 18.2 4.0 12.3 2.8 15.8
100,000 lbs or more 30.3 0.2 37.1 1.7 S S 41.0

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 21.9 27.3 33.1 8.1
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 27.9
10,000 to 49,999 lbs S S 43.0 1.9 42.9 1.5 16.7
50,000 to 99,999 lbs 19.7 0.9 20.2 0.6 24.0 0.7 13.6
100,000 lbs or more 21.4 2.6 27.9 2.3 33.6 1.8 8.3

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 31.8 36.6 29.7 9.3
Less than 50 lbs S S S S S S 10.0
50 to 99 lbs 42.2 1.9 42.9 0.4 S S 16.0
100 to 499 lbs S S S S S S 21.3
500 to 749 lbs S S S S S S 28.4
750 to 999 lbs S S S S S S 26.8
1,000 to 9,999 lbs S S S S S S 25.9
10,000 to 49,999 lbs S S S S S S 29.3
50,000 to 99,999 lbs
100,000 lbs or more 42.4 13.0 S S 36.0 15.8 21.3

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 30.2 34.8 9.2
Less than 50 lbs 28.3 8.6 S S S S 9.4
50 to 99 lbs 22.6 2.7 22.4 1.0 34.4 0.7 15.6
100 to 499 lbs 25.4 3.5 27.6 1.9 25.5 1.9 10.0
500 to 749 lbs 44.0 1.5 S S S S 38.0
750 to 999 lbs S S 44.6 0.2 44.0 0.2 30.3
1,000 to 9,999 lbs 34.7 0.3 43.3 0.7 45.3 1.5 27.6
10,000 to 49,999 lbs 49.1 6.3 37.3 7.8 46.4 9.2 9.0
50,000 to 99,999 lbs S S 40.9 5.8 50.0 1.0 30.8
100,000 lbs or more 48.5 1.8 44.4 15.2 S S 31.7

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 19.1 39.9 S S 9.4
Less than 50 lbs 28.4 7.6 S S S S 9.4
50 to 99 lbs 22.6 2.9 22.2 2.6 34.4 3.3 15.6
100 to 499 lbs 25.5 4.4 28.1 5.6 26.5 7.2 10.4
500 to 749 lbs 44.0 1.7 S S S S 38.1
750 to 999 lbs S S 49.5 0.6 S S 26.5
1,000 to 9,999 lbs S S S S S S 29.2
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 29.0 33.1 38.4 45.5
Less than 50 lbs S S S S S S S
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 28.0
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 37.2 2.8 45.7 4.4 45.8 5.1 25.9
10,000 to 49,999 lbs 49.1 10.9 37.3 13.3 46.4 14.3 9.0
50,000 to 99,999 lbs S S 40.9 8.3 50.0 1.6 30.8
100,000 lbs or more 48.5 12.5 44.4 16.9 S S 31.7

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 24.8 46.9 36.7 S
Less than 50 lbs S S 45.6 0.2 S S S
50 to 99 lbs 45.8 2.6 S S 37.8 S
100 to 499 lbs S S 49.8 0.6 S S S
500 to 749 lbs S S S S 46.1 S
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs 34.6 3.7 38.8 4.8 S S 38.7
10,000 to 49,999 lbs 38.8 9.4 46.1 8.1 S S S
50,000 to 99,999 lbs S S S S 48.3 6.5 S
100,000 lbs or more 37.0 4.3 S S S S 39.1

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.