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Table B-3. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Distance Shipped for CBSA of Origin: 2002

Table B-3. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Distance Shipped 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

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 4.7 – 11.3 – 13.4 –
Less than 50 miles 5.4 2.6 15.8 3.7 11.8 1.3
50 to 99 miles 13.3 0.9 22.2 2.6 19.6 0.9
100 to 249 miles 13.1 0.6 26.9 1.0 31.6 2.8
250 to 499 miles 8.6 0.6 14.0 1.3 13.2 1.8
500 to 749 miles S S 22.3 0.3 24.0 0.6
750 to 999 miles 14.4 0.6 17.4 0.4 17.5 2.1
1,000 to 1,499 miles 11.2 0.6 22.6 0.4 23.0 1.5
1,500 to 1,999 miles 13.7 1.2 29.9 0.8 29.1 3.8
2,000 miles or more 9.8 1.1 18.0 0.4 18.4 2.2

Single modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 5.0 – 11.6 – 12.1 –
Less than 50 miles 5.6 2.7 15.8 3.6 12.0 1.4
50 to 99 miles 13.0 0.8 22.4 2.7 19.7 1.0
100 to 249 miles 18.1 0.8 27.4 1.0 32.1 2.9
250 to 499 miles 8.2 1.0 14.7 1.3 13.9 1.9
500 to 749 miles S S 22.0 0.3 23.7 0.6
750 to 999 miles 19.4 0.8 17.7 0.4 17.8 2.2
1,000 to 1,499 miles 14.5 0.7 21.4 0.3 21.9 1.6
1,500 to 1,999 miles 18.6 1.4 28.7 0.8 27.6 3.7
2,000 miles or more 9.4 0.8 20.1 0.4 20.5 2.3

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 5.6 – 13.6 – 13.5 –
Less than 50 miles 7.1 3.0 18.6 4.0 14.2 1.5
50 to 99 miles 12.8 0.8 22.4 3.2 19.7 1.3
100 to 249 miles 18.9 0.9 32.1 1.0 38.9 3.3
250 to 499 miles 9.6 0.9 16.4 1.6 15.9 2.4
500 to 749 miles S S 21.7 0.3 23.4 0.7
750 to 999 miles 20.5 0.9 14.1 0.4 13.6 1.5
1,000 to 1,499 miles 16.3 0.8 20.3 0.3 20.8 1.2
1,500 to 1,999 miles 22.8 1.6 31.5 0.8 30.8 3.7
2,000 miles or more 8.6 0.7 22.2 0.4 22.7 2.5

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 33.2 – 33.9 – 24.0 –
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles S S S S S S
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles S S S S S S
1,000 to 1,499 miles 43.4 6.8 46.4 8.1 47.0 7.7
1,500 to 1,999 miles 42.0 6.3 49.1 6.0 48.6 9.8
2,000 miles or more S S S S S S

All other Single modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.1 – 31.8 – 28.6 –
Less than 50 miles 29.1 8.0 32.2 1.5 21.1 7.8
50 to 99 miles 46.4 1.1 S S S S
100 to 249 miles 42.6 1.1 S S S S
250 to 499 miles S S S S S S
500 to 749 miles 35.4 0.3 S S S S
750 to 999 miles 31.5 1.1 S S 36.4 1.6
1,000 to 1,499 miles 30.0 2.4 36.0 0.2 37.3 1.5
1,500 to 1,999 miles 22.0 2.9 28.9 0.4 29.0 4.9
2,000 miles or more 22.1 4.0 47.0 0.7 48.1 6.2

Multiple modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 12.1 – 33.1 – 45.8 –
Less than 50 miles 14.2 3.6 15.1 3.3 18.0 0.1
50 to 99 miles 28.7 1.7 22.7 1.7 27.2 0.1
100 to 249 miles 18.9 0.8 25.3 0.9 27.7 0.2
250 to 499 miles 10.8 0.5 19.0 2.1 18.2 1.1
500 to 749 miles 26.8 0.9 31.0 0.6 35.4 0.5
750 to 999 miles 9.2 0.7 12.2 1.1 12.9 1.3
1,000 to 1,499 miles 13.8 0.8 S S S S
1,500 to 1,999 miles 21.7 1.8 S S S S
2,000 miles or more 16.0 2.1 33.6 2.5 35.7 5.1

Parcel, USPS or courier

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 12.6 – 12.7 – 14.9 –
Less than 50 miles 14.2 3.6 15.3 3.6 18.8 0.2
50 to 99 miles 28.8 1.7 22.1 1.5 26.0 0.2
100 to 249 miles 18.9 0.8 25.3 0.8 27.7 0.2
250 to 499 miles 10.8 0.6 19.3 1.6 18.6 1.1
500 to 749 miles 27.0 1.0 18.3 0.6 19.5 0.7
750 to 999 miles 9.9 0.7 15.3 0.5 15.7 0.8
1,000 to 1,499 miles 13.5 0.8 18.7 0.9 19.3 1.2
1,500 to 1,999 miles 22.9 1.8 17.3 1.9 17.1 2.4
2,000 miles or more 16.2 2.0 17.5 2.1 17.4 2.9

All other multiple modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances S S S S S S
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles – – – – – –
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles 42.0 4.7 35.9 3.1 35.3 2.0
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles S S S S S S
2,000 miles or more S S S S S S

Other and unknown modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.6 – 30.6 – 20.4 –
Less than 50 miles 15.1 7.1 44.4 7.1 34.0 1.1
50 to 99 miles 37.6 1.1 45.5 5.6 39.8 1.0
100 to 249 miles S S 33.8 1.0 33.2 0.4
250 to 499 miles 49.1 1.7 30.9 3.0 31.0 5.7
500 to 749 miles 46.0 1.5 49.2 0.9 49.5 2.4
750 to 999 miles 49.8 1.0 45.2 0.5 45.5 1.5
1,000 to 1,499 miles 39.1 2.0 49.7 0.6 48.9 2.8
1,500 to 1,999 miles 35.8 4.3 29.8 0.9 29.3 4.5
2,000 miles or more 23.9 2.2 22.7 4.5 22.6 8.7

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.