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 8.3 36.7 38.4 27.4
Less than 50 lbs 33.3 5.4 26.6 29.9 0.3 36.8
50 to 99 lbs 20.0 0.6 30.4 25.1 0.1 S
100 to 499 lbs 26.4 2.2 24.4 0.3 30.2 0.7 11.4
500 to 749 lbs 20.8 0.4 13.9 28.4 0.2 23.1
750 to 999 lbs 46.3 2.4 20.5 23.9 0.1 34.1
1,000 to 9,999 lbs 10.6 1.6 31.9 1.6 25.5 1.9 22.1
10,000 to 49,999 lbs 14.0 4.2 S S 15.7 7.3 29.2
50,000 to 99,999 lbs 21.5 1.2 27.5 6.1 34.0 5.1 19.1
100,000 lbs or more 30.9 1.7 28.7 6.4 S S S

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 11.4 39.0 19.3 34.8
Less than 50 lbs 22.2 1.4 35.1 32.5 S
50 to 99 lbs 31.0 0.5 37.3 27.7 S
100 to 499 lbs 34.4 2.2 25.1 0.2 32.1 0.4 13.8
500 to 749 lbs 19.1 0.4 14.4 30.1 18.1
750 to 999 lbs 31.5 0.6 21.1 0.1 22.5 27.8
1,000 to 9,999 lbs 10.2 2.6 32.8 1.6 23.3 1.3 18.9
10,000 to 49,999 lbs 15.2 4.0 S S 16.6 4.5 28.7
50,000 to 99,999 lbs 21.7 1.4 27.6 6.0 34.4 4.6 19.5
100,000 lbs or more 24.4 1.2 29.4 4.7 38.1 9.5 S

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 12.3 40.9 18.1 27.2
Less than 50 lbs 27.4 1.5 36.9 27.3 S
50 to 99 lbs 33.1 0.5 37.7 28.9 49.4
100 to 499 lbs 36.1 2.2 25.2 0.2 34.2 0.4 14.4
500 to 749 lbs 19.5 0.3 14.4 0.1 30.6 18.4
750 to 999 lbs 31.7 0.6 21.1 0.1 22.7 0.1 28.1
1,000 to 9,999 lbs 10.4 2.6 32.9 1.8 23.2 1.3 18.2
10,000 to 49,999 lbs 15.3 4.6 S S 17.3 3.4 28.3
50,000 to 99,999 lbs 21.7 1.4 27.6 5.9 34.6 4.3 17.6
100,000 lbs or more 32.9 0.8 37.6 3.3 21.4 3.9 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 35.5 43.9 42.5 19.7
Less than 50 lbs
50 to 99 lbs S S S S S S 32.4
100 to 499 lbs S S S S S S S
500 to 749 lbs S S S S S S 30.0
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs 48.2 1.7 S S 42.9 0.1 46.0
10,000 to 49,999 lbs 33.6 5.4 43.8 1.9 43.3 2.2 31.1
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more 37.4 7.0 43.9 2.1 42.7 2.2 12.6

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 35.3 S S 36.5 11.8
Less than 50 lbs S S S S S S 13.1
50 to 99 lbs S S S S S S 29.2
100 to 499 lbs 44.6 8.4 37.1 12.1 41.8 11.5 25.0
500 to 749 lbs S S S S S S 29.9
750 to 999 lbs S S S S S S 29.8
1,000 to 9,999 lbs S S S S S S 18.5
10,000 to 49,999 lbs S S S S S S 29.8
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 31.6

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 26.7 S S S S 35.1
Less than 50 lbs 40.8 9.4 38.0 7.6 32.0 6.6 36.5
50 to 99 lbs 25.6 2.3 25.0 3.7 26.6 3.2 27.3
100 to 499 lbs 26.3 4.9 29.2 9.1 45.8 6.8 19.9
500 to 749 lbs 44.0 1.1 34.7 2.3 S S 32.2
750 to 999 lbs S S S S S S 29.8
1,000 to 9,999 lbs S S S S S S 23.6
10,000 to 49,999 lbs 45.0 0.6 31.6 8.7 30.5 15.1 15.4
50,000 to 99,999 lbs
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 28.9 23.0 23.9 35.1
Less than 50 lbs 40.8 9.5 38.0 6.8 32.0 8.3 36.5
50 to 99 lbs 25.6 2.4 25.0 2.8 26.6 4.6 27.3
100 to 499 lbs 26.4 5.0 29.3 5.9 46.0 7.9 20.2
500 to 749 lbs 45.1 1.2 36.1 2.0 S S 31.3
750 to 999 lbs S S S S S S 29.8
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 8.0
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 S S S S S S 29.9
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 23.6
10,000 to 49,999 lbs 45.0 18.3 S S S S 15.4
50,000 to 99,999 lbs
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 43.1 32.7 S S 43.2
Less than 50 lbs S S 24.9 0.8 S S 36.0
50 to 99 lbs 47.5 2.1 43.3 0.6 S S S
100 to 499 lbs S S 48.6 6.0 S S 29.3
500 to 749 lbs S S S S S S 31.5
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs 46.4 11.8 S S S S 27.3
10,000 to 49,999 lbs S S S S 41.6 11.9 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 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.