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 21.0 10.9 15.6 14.7
Less than 50 lbs 29.0 3.5 23.0 32.3 13.1
50 to 99 lbs 34.4 0.5 31.8 25.6 28.4
100 to 499 lbs 40.0 2.0 18.1 22.2 17.6
500 to 749 lbs 36.2 0.5 19.6 30.7 18.8
750 to 999 lbs 28.6 0.2 26.2 20.0 22.4
1,000 to 9,999 lbs 38.2 2.5 26.1 0.9 39.4 1.1 18.7
10,000 to 49,999 lbs 25.0 3.9 8.6 5.4 21.2 4.5 13.2
50,000 to 99,999 lbs 19.5 1.0 27.5 2.4 S S 21.1
100,000 lbs or more 23.5 2.0 16.6 5.8 19.8 5.3 18.4

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 23.8 10.8 16.5 20.0
Less than 50 lbs 45.8 0.9 29.2 S S 33.2
50 to 99 lbs S S 46.6 15.8 49.9
100 to 499 lbs 47.6 1.9 21.0 27.7 20.4
500 to 749 lbs 39.5 0.4 21.2 34.4 18.5
750 to 999 lbs 28.9 0.3 26.5 20.3 22.6
1,000 to 9,999 lbs 38.2 2.5 26.3 1.3 39.6 1.3 18.6
10,000 to 49,999 lbs 24.3 3.5 8.5 5.4 20.5 4.9 12.9
50,000 to 99,999 lbs 20.1 1.1 27.6 2.4 S S 21.1
100,000 lbs or more 24.7 2.2 17.5 6.1 21.2 5.8 18.9

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 26.2 6.3 20.7 20.7
Less than 50 lbs 47.7 0.9 29.9 S S 24.8
50 to 99 lbs S S 47.1 16.0 S
100 to 499 lbs 47.7 2.0 21.0 0.1 28.0 0.1 21.2
500 to 749 lbs 39.7 0.4 21.3 34.3 18.5
750 to 999 lbs 29.1 0.3 26.6 0.1 20.7 22.8
1,000 to 9,999 lbs 39.0 2.6 26.5 1.9 39.8 1.3 18.7
10,000 to 49,999 lbs 24.4 3.5 8.5 4.4 20.6 4.4 13.0
50,000 to 99,999 lbs 20.3 1.2 27.3 4.7 S S 21.4
100,000 lbs or more 28.8 0.3 29.6 4.6 24.7 1.9 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 15.0 23.2 23.9 15.1
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 31.6
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs S S S S S S 30.8
1,000 to 9,999 lbs 43.2 2.1 S S 46.1 26.4
10,000 to 49,999 lbs S S 31.8 41.7 25.6
50,000 to 99,999 lbs S S S S S S 26.8
100,000 lbs or more 15.3 3.0 23.3 0.4 23.9 0.3 17.2

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 44.1 30.5 24.9 16.9
Less than 50 lbs 43.4 2.3 31.6 23.1 0.2 16.7
50 to 99 lbs S S 38.4 37.6 0.1 24.7
100 to 499 lbs 26.3 0.8 33.1 39.2 0.6 27.6
500 to 749 lbs S S S S S S 27.3
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 28.4
10,000 to 49,999 lbs S S S S S S 30.7
50,000 to 99,999 lbs
100,000 lbs or more S S 30.5 0.2 24.9 2.6 15.3

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 28.0 31.6 35.1 5.5
Less than 50 lbs 39.8 8.8 37.3 5.9 33.9 6.5 5.8
50 to 99 lbs 30.4 1.6 29.5 1.8 31.9 1.9 5.7
100 to 499 lbs 33.5 5.1 23.6 3.8 26.3 2.1 8.9
500 to 749 lbs S S S S S S 21.2
750 to 999 lbs 37.5 35.8 43.7 0.1 36.3
1,000 to 9,999 lbs S S S S S S 39.7
10,000 to 49,999 lbs S S 46.4 6.3 48.6 7.8 14.8
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more 26.8 0.5 38.1 13.8 39.8 13.3 19.6

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 31.2 24.5 25.2 5.5
Less than 50 lbs 39.8 8.0 37.3 6.8 33.9 6.3 5.8
50 to 99 lbs 30.4 1.7 29.5 1.7 31.9 1.8 5.7
100 to 499 lbs 33.6 5.9 23.5 5.6 23.7 5.7 9.0
500 to 749 lbs S S S S S S 20.2
750 to 999 lbs 40.1 0.2 40.2 0.4 S S 28.3
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 35.4 37.5 27.9
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 31.6
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 S S S S S S 39.7
10,000 to 49,999 lbs S S 46.4 14.3 48.6 13.2 14.8
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more 26.8 8.1 38.1 14.3 39.8 13.1 19.6

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 34.1 S S S S S
Less than 50 lbs 46.5 4.0 48.8 0.3 S S S
50 to 99 lbs S S S S S S S
100 to 499 lbs 38.4 2.2 S S 45.1 0.4 S
500 to 749 lbs S S S S S S S
750 to 999 lbs S S S S S S S
1,000 to 9,999 lbs 44.1 8.2 35.5 6.8 37.5 11.3 24.6
10,000 to 49,999 lbs S S 34.9 13.9 38.1 8.3 S
50,000 to 99,999 lbs S S 44.9 4.3 S S S
100,000 lbs or more S S S S S S S

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.