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 9.5 18.0 16.7 18.1
Less than 50 lbs 23.6 2.0 18.0 25.6 37.9
50 to 99 lbs 27.4 0.7 9.0 27.6 20.2
100 to 499 lbs 16.0 1.6 18.1 0.2 20.2 0.2 24.9
500 to 749 lbs 15.5 0.8 22.0 0.2 19.4 0.2 39.4
750 to 999 lbs 26.4 0.7 27.2 20.8 S
1,000 to 9,999 lbs 13.7 2.1 21.0 0.9 25.4 0.9 12.1
10,000 to 49,999 lbs 10.7 3.3 14.4 5.8 25.9 5.5 22.8
50,000 to 99,999 lbs 43.6 2.5 32.1 4.9 24.9 2.8 23.8
100,000 lbs or more 31.5 2.3 35.3 6.3 25.9 5.4 20.7

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 11.5 17.7 15.1 29.5
Less than 50 lbs 35.7 1.7 28.7 14.8 S
50 to 99 lbs 30.0 0.5 19.3 21.0 17.8
100 to 499 lbs 18.4 1.0 22.1 0.2 18.2 0.2 29.8
500 to 749 lbs 15.5 0.7 22.9 0.2 19.7 0.2 42.0
750 to 999 lbs 29.6 0.8 27.1 23.1 S
1,000 to 9,999 lbs 16.0 2.2 18.1 0.9 15.2 0.8 13.7
10,000 to 49,999 lbs 10.6 3.4 14.1 5.8 21.8 5.2 22.8
50,000 to 99,999 lbs 41.1 2.6 29.9 5.1 25.0 2.7 22.9
100,000 lbs or more 31.0 2.4 34.7 6.2 25.1 5.3 21.1

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 9.9 14.3 18.0 25.5
Less than 50 lbs 41.5 1.9 30.1 17.1 S
50 to 99 lbs 30.1 0.5 19.6 25.5 17.5
100 to 499 lbs 18.5 1.1 22.1 0.2 17.0 0.2 31.7
500 to 749 lbs 15.4 0.8 22.9 0.2 19.7 0.2 42.6
750 to 999 lbs 29.5 0.9 27.1 0.1 23.1 S
1,000 to 9,999 lbs 15.9 2.5 17.9 0.9 13.6 1.1 15.0
10,000 to 49,999 lbs 10.7 3.4 14.1 5.1 22.0 4.8 23.2
50,000 to 99,999 lbs 42.6 2.8 30.8 5.7 26.3 3.8 24.0
100,000 lbs or more 47.4 0.9 S S 45.2 0.6 28.9

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 38.4 43.8 35.9 24.8
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 29.8
10,000 to 49,999 lbs S S S S 45.8 0.1 31.0
50,000 to 99,999 lbs S S S S S S 29.6
100,000 lbs or more 39.7 6.6 43.2 0.6 35.9 0.5 24.6

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 27.3 33.5 30.5 9.2
Less than 50 lbs 29.9 8.3 36.6 36.9 7.4
50 to 99 lbs 38.0 1.6 47.1 44.6 19.1
100 to 499 lbs 47.7 6.9 S S S S 20.7
500 to 749 lbs S S S S S S 28.0
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 29.9
10,000 to 49,999 lbs S S S S S S 28.9
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more 42.1 11.6 33.5 0.4 32.9 12.0 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 26.6 49.9 S S 15.2
Less than 50 lbs 24.4 8.9 41.8 9.2 36.5 9.3 18.7
50 to 99 lbs S S 37.6 4.6 44.6 5.3 15.9
100 to 499 lbs 45.4 6.4 37.3 9.1 48.7 10.1 21.4
500 to 749 lbs S S S S S S 28.2
750 to 999 lbs 46.3 1.4 46.8 0.6 S S 29.0
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S S S S S 31.2
50,000 to 99,999 lbs
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 29.4 34.9 43.1 15.2
Less than 50 lbs 24.4 10.7 41.8 6.2 36.5 5.8 18.7
50 to 99 lbs S S 38.0 4.4 44.6 5.0 15.6
100 to 499 lbs 45.6 6.4 37.8 5.8 49.8 6.0 21.4
500 to 749 lbs S S S S S S 30.1
750 to 999 lbs 46.3 1.6 46.8 2.4 S S 29.0
1,000 to 9,999 lbs S S S S S S 39.0
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 S
Less than 50 lbs
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S S
500 to 749 lbs S S S S S S S
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S S S S S 31.2
50,000 to 99,999 lbs
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 35.4 S S S S S
Less than 50 lbs 40.4 6.0 47.1 0.9 29.8 0.2 S
50 to 99 lbs 47.9 1.0 S S S S 27.0
100 to 499 lbs S S S S S S S
500 to 749 lbs S S S S S S 40.0
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs 36.8 10.6 S S S S 26.2
10,000 to 49,999 lbs S S S S S S 32.0
50,000 to 99,999 lbs S S S S S S 30.3
100,000 lbs or more S S S S S S 31.6

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.