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 27.8 34.4 16.7 9.7
Less than 50 lbs 22.4 1.6 15.1 15.1 9.6
50 to 99 lbs 15.7 0.4 8.3 14.4 14.2
100 to 499 lbs 12.8 1.2 13.7 0.3 22.2 0.3 18.2
500 to 749 lbs 14.8 0.5 15.0 0.1 23.4 0.3 23.9
750 to 999 lbs 19.1 0.3 17.7 0.1 34.9 0.2 22.3
1,000 to 9,999 lbs S S 44.0 3.1 47.8 5.1 13.6
10,000 to 49,999 lbs 15.7 7.8 37.0 4.7 30.5 6.8 37.3
50,000 to 99,999 lbs 19.2 1.0 38.3 2.9 18.5 2.7 19.3
100,000 lbs or more 39.2 1.5 48.3 3.5 43.0 6.0 42.0

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 30.4 35.3 17.1 15.8
Less than 50 lbs 17.4 0.3 18.1 28.9 23.5
50 to 99 lbs 24.5 0.2 10.1 15.3 11.8
100 to 499 lbs 15.2 1.2 15.7 0.3 25.6 0.2 19.0
500 to 749 lbs 18.0 0.6 15.4 0.1 14.8 0.1 16.9
750 to 999 lbs 19.1 0.4 18.2 0.1 38.7 0.2 20.3
1,000 to 9,999 lbs S S 45.3 3.1 48.4 5.2 14.2
10,000 to 49,999 lbs 15.6 8.8 37.8 4.7 30.9 6.7 37.5
50,000 to 99,999 lbs 19.2 1.3 39.2 2.8 19.0 2.5 20.9
100,000 lbs or more 39.2 1.6 48.3 3.6 43.0 6.2 42.0

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 31.0 37.5 20.3 16.2
Less than 50 lbs 18.9 0.3 18.5 31.7 25.6
50 to 99 lbs 24.2 0.2 10.3 16.6 12.2
100 to 499 lbs 15.2 1.3 15.7 0.3 25.6 0.5 19.0
500 to 749 lbs 18.0 0.6 15.4 0.1 14.8 0.2 16.9
750 to 999 lbs 19.1 0.4 18.2 0.1 38.7 0.3 20.3
1,000 to 9,999 lbs S S 45.4 3.1 48.7 5.3 13.9
10,000 to 49,999 lbs 15.7 9.0 37.9 4.5 31.1 6.4 37.7
50,000 to 99,999 lbs 19.3 1.2 39.3 3.2 19.9 2.7 20.5
100,000 lbs or more 46.8 0.9 S S S S S

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 41.4 36.5 42.2 8.3
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
10,000 to 49,999 lbs S S S S S S 29.5
50,000 to 99,999 lbs S S S S S S 47.7
100,000 lbs or more 42.5 1.8 38.0 5.0 43.0 4.0 7.7

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 30.3 S S S S 19.5
Less than 50 lbs 35.1 15.0 28.7 18.5 27.8 19.3 21.6
50 to 99 lbs S S 43.4 9.7 49.7 8.9 29.6
100 to 499 lbs S S S S S S 28.7
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs S S S S S S 31.6
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more

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 21.1 40.2 38.3 8.4
Less than 50 lbs 26.3 4.3 23.1 9.8 17.7 10.7 8.7
50 to 99 lbs 20.8 1.7 19.1 2.6 21.8 2.4 15.0
100 to 499 lbs 39.1 3.0 35.5 4.1 40.7 4.1 18.2
500 to 749 lbs S S S S S S 28.7
750 to 999 lbs 46.7 S S S S 28.0
1,000 to 9,999 lbs S S S S S S 31.5
10,000 to 49,999 lbs 37.6 1.7 37.9 7.8 39.5 8.4 21.3
50,000 to 99,999 lbs 47.8 0.5 S S S S 25.8
100,000 lbs or more

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 22.1 21.4 30.0 8.5
Less than 50 lbs 26.3 3.9 23.1 5.5 17.7 7.1 8.7
50 to 99 lbs 20.8 1.9 19.1 2.4 21.8 2.9 15.0
100 to 499 lbs 39.1 3.2 35.5 4.6 40.7 5.1 18.2
500 to 749 lbs S S S S S S 28.7
750 to 999 lbs 46.7 S S S S 28.0
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 36.9 S S 47.5 S
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 31.5
10,000 to 49,999 lbs 37.6 9.9 37.9 12.2 39.5 10.1 21.3
50,000 to 99,999 lbs 47.8 6.2 S S S S 25.8
100,000 lbs or more

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 33.8 35.6 36.8 S
Less than 50 lbs 46.1 8.0 40.1 1.9 S S S
50 to 99 lbs 37.5 3.1 28.4 0.8 S S 48.8
100 to 499 lbs 37.8 4.9 26.7 2.1 28.1 1.0 S
500 to 749 lbs S S 36.5 0.7 S S 36.8
750 to 999 lbs S S S S S S 30.2
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S 35.2 8.8 39.4 11.4 44.8
50,000 to 99,999 lbs S S S S S S 34.4
100,000 lbs or more

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.