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 7.5 20.9 19.0 9.4
Less than 50 lbs 10.0 1.2 36.2 26.7 13.1
50 to 99 lbs 12.8 0.3 25.1 31.8 22.6
100 to 499 lbs 27.6 2.7 14.6 30.5 18.2
500 to 749 lbs 17.6 0.5 13.9 19.1 13.4
750 to 999 lbs 24.6 0.2 22.1 24.7 35.3
1,000 to 9,999 lbs 22.1 3.1 16.3 0.4 23.3 1.3 19.0
10,000 to 49,999 lbs 13.7 3.2 41.8 2.5 20.0 3.4 18.9
50,000 to 99,999 lbs 33.2 2.2 36.5 5.7 43.0 4.9 15.2
100,000 lbs or more 23.9 1.7 17.6 6.0 23.6 8.6 17.7

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 7.4 19.6 17.4 14.6
Less than 50 lbs 34.1 0.8 31.8 17.7 S
50 to 99 lbs 33.7 0.3 27.3 32.6 36.6
100 to 499 lbs 48.8 2.4 18.6 15.6 27.6
500 to 749 lbs 27.6 0.6 15.8 20.6 15.6
750 to 999 lbs 16.7 0.2 24.6 26.4 33.1
1,000 to 9,999 lbs 23.6 3.9 17.0 0.5 24.0 1.4 13.2
10,000 to 49,999 lbs 13.1 3.8 42.0 2.7 19.7 3.5 19.6
50,000 to 99,999 lbs 33.4 2.9 36.6 8.6 43.2 5.1 15.3
100,000 lbs or more 25.9 1.9 18.9 9.2 22.0 9.0 17.2

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 7.9 28.2 26.2 11.4
Less than 50 lbs 32.4 0.6 33.8 25.6 S
50 to 99 lbs 33.4 0.3 27.5 34.0 25.8
100 to 499 lbs 15.2 0.5 18.9 0.1 18.2 30.0
500 to 749 lbs 23.2 0.5 15.8 20.6 0.1 15.8
750 to 999 lbs 16.7 0.2 24.6 26.5 0.1 33.2
1,000 to 9,999 lbs 23.9 3.8 17.1 1.8 24.1 1.8 13.3
10,000 to 49,999 lbs 12.9 3.7 42.0 6.4 19.6 7.3 19.6
50,000 to 99,999 lbs 33.4 3.3 36.6 9.8 43.2 7.8 15.3
100,000 lbs or more 44.2 0.7 33.6 7.0 38.6 2.6 21.9

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 29.8 21.1 23.3 11.0
Less than 50 lbs S S S S S S 29.8
50 to 99 lbs S S S S S S 29.9
100 to 499 lbs S S S S S S 30.1
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 34.8
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 31.1 3.0 21.1 23.3 13.6

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 42.4 S S 7.0
Less than 50 lbs 44.2 11.1 29.1 12.6 28.1 12.7 8.8
50 to 99 lbs S S 30.9 0.9 38.6 1.2 21.1
100 to 499 lbs S S 40.2 7.9 S S 20.6
500 to 749 lbs S S S S S S 28.5
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 29.0
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 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 18.1 S S S S 12.1
Less than 50 lbs 14.2 7.3 45.1 11.8 28.1 11.5 12.8
50 to 99 lbs 20.9 2.0 37.1 4.2 33.3 3.9 9.9
100 to 499 lbs 36.2 5.6 S S S S 12.2
500 to 749 lbs 45.4 1.5 S S S S 30.3
750 to 999 lbs S S S S S S 30.2
1,000 to 9,999 lbs S S S S S S 26.3
10,000 to 49,999 lbs S S S S S S 27.2
50,000 to 99,999 lbs S S S S S S 34.4
100,000 lbs or more S S S S S S 31.6

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 17.0 33.4 27.8 12.1
Less than 50 lbs 14.2 7.1 45.1 7.1 28.3 6.9 12.7
50 to 99 lbs 20.9 2.0 37.1 2.5 33.3 2.6 9.9
100 to 499 lbs 36.2 5.7 S S S S 10.4
500 to 749 lbs 45.4 1.6 S S S S 30.3
750 to 999 lbs S S S S S S 31.6
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 S S S S S S 27.6
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs
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 26.3
10,000 to 49,999 lbs S S S S S S 27.2
50,000 to 99,999 lbs S S S S S S 34.4
100,000 lbs or more S S S S S S 31.6

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 23.9 45.3 36.5 31.5
Less than 50 lbs 39.3 8.3 34.7 1.5 45.2 0.7 41.2
50 to 99 lbs S S 45.3 9.0 S S 30.1
100 to 499 lbs 38.6 2.0 S S S S S
500 to 749 lbs S S S S S S 30.6
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 24.8
10,000 to 49,999 lbs 44.1 6.0 S S 45.9 6.3 S
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more 42.3 12.2 S S S S 30.0

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.