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 17.0 14.6 25.7 12.0
Less than 50 lbs 12.3 1.9 9.8 20.0 0.2 10.5
50 to 99 lbs 12.8 0.4 14.9 17.2 19.9
100 to 499 lbs 19.8 1.7 13.5 0.2 27.9 0.5 15.3
500 to 749 lbs 16.9 0.2 10.9 0.1 16.1 15.0
750 to 999 lbs 26.0 0.3 15.7 24.1 15.0
1,000 to 9,999 lbs 25.5 1.4 14.7 1.4 16.5 1.7 11.4
10,000 to 49,999 lbs 27.1 2.5 9.8 4.8 23.3 5.7 12.7
50,000 to 99,999 lbs 25.5 1.4 21.1 3.1 18.8 3.0 13.6
100,000 lbs or more 24.1 2.3 20.3 5.0 35.9 7.1 21.6

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 19.2 15.2 27.2 29.4
Less than 50 lbs 27.1 1.0 20.7 24.8 41.4
50 to 99 lbs 23.3 0.3 22.9 14.6 30.4
100 to 499 lbs 15.2 1.3 13.8 0.2 32.6 0.4 19.3
500 to 749 lbs 16.6 0.2 11.5 0.1 17.4 13.9
750 to 999 lbs 28.8 0.4 15.4 26.6 14.6
1,000 to 9,999 lbs 27.3 1.4 14.5 1.4 18.4 1.7 12.9
10,000 to 49,999 lbs 27.3 2.7 9.9 5.0 23.9 6.3 12.6
50,000 to 99,999 lbs 25.3 1.8 22.1 3.4 21.3 3.5 13.4
100,000 lbs or more 24.8 2.6 21.1 5.0 37.4 7.4 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 21.0 15.7 13.2 23.2
Less than 50 lbs 29.6 0.8 22.2 28.2 47.9
50 to 99 lbs 23.3 0.3 23.6 18.0 34.6
100 to 499 lbs 15.3 1.3 14.0 0.2 33.9 0.4 20.0
500 to 749 lbs 15.7 0.2 11.5 0.1 18.1 15.1
750 to 999 lbs 29.1 0.6 15.7 27.4 14.6
1,000 to 9,999 lbs 24.9 1.5 14.3 1.3 17.7 1.7 13.0
10,000 to 49,999 lbs 27.4 2.8 9.8 6.2 24.0 7.0 12.5
50,000 to 99,999 lbs 23.8 1.6 22.2 3.4 21.1 3.3 13.4
100,000 lbs or more 22.3 1.2 25.5 4.7 24.2 5.3 12.7

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 35.9 48.4 S S 12.6
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 S
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 36.1
10,000 to 49,999 lbs S S S S S S 49.3
50,000 to 99,999 lbs S S S S S S 28.7
100,000 lbs or more S S 49.0 3.4 S S 12.1

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 10.9 23.6 48.8 5.9
Less than 50 lbs 34.0 4.9 20.9 7.8 23.9 7.6 3.4
50 to 99 lbs 32.3 1.8 S S 38.0 1.1 49.2
100 to 499 lbs 28.2 2.8 30.9 1.5 28.7 2.6 15.1
500 to 749 lbs S S S S S S 21.3
750 to 999 lbs S S S S S S 33.7
1,000 to 9,999 lbs S S S S S S 23.2
10,000 to 49,999 lbs S S S S S S 34.5
50,000 to 99,999 lbs 42.1 0.1 39.3 0.1 41.2 23.9
100,000 lbs or more 20.1 9.5 23.8 14.8 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 12.4 33.9 30.0 4.8
Less than 50 lbs 11.5 5.1 16.3 7.9 22.4 7.3 4.6
50 to 99 lbs 18.3 2.0 15.5 2.5 19.7 1.8 11.0
100 to 499 lbs 39.8 5.1 24.5 8.5 34.0 8.2 10.9
500 to 749 lbs S S S S S S S
750 to 999 lbs 32.3 0.2 44.8 0.4 S S 28.1
1,000 to 9,999 lbs 34.2 0.4 S S S S S
10,000 to 49,999 lbs 45.9 0.3 S S S S S
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 29.8

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 13.0 15.0 21.1 4.8
Less than 50 lbs 11.6 5.3 16.3 5.0 22.4 6.5 4.6
50 to 99 lbs 18.3 2.1 15.5 1.5 19.7 1.9 11.0
100 to 499 lbs 39.8 5.1 24.6 5.3 34.1 7.5 10.9
500 to 749 lbs S S S S S S 42.1
750 to 999 lbs 33.1 0.2 45.3 1.6 S S 30.3
1,000 to 9,999 lbs S S S S S S 29.7
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 28.2 S S 48.9 S
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 33.9
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 42.2 9.3 S S S S S
10,000 to 49,999 lbs 45.9 11.5 S S S S S
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 29.8

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 31.0 29.3 S S S
Less than 50 lbs S S 37.9 0.8 45.9 0.4 S
50 to 99 lbs S S S S S S S
100 to 499 lbs S S 46.9 1.7 S S S
500 to 749 lbs S S 38.9 1.0 49.6 1.0 S
750 to 999 lbs 43.4 1.3 S S 45.9 0.1 37.5
1,000 to 9,999 lbs 23.3 10.1 42.6 13.4 48.0 16.2 31.2
10,000 to 49,999 lbs 48.3 2.9 48.6 6.5 S S S
50,000 to 99,999 lbs S S 46.7 7.5 S S 30.6
100,000 lbs or more 49.3 6.1 S S S S 31.5

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.