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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

[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 10.8 – 14.9 – 16.7 –
Less than 50 miles 8.5 3.6 16.7 4.4 13.2 3.3
50 to 99 miles 11.7 0.9 29.6 2.3 36.0 1.7
100 to 249 miles 8.6 1.2 32.4 1.9 33.5 2.6
250 to 499 miles 11.8 1.4 25.6 0.3 25.2 2.6
500 to 749 miles 27.2 1.3 28.8 0.2 29.5 1.8
750 to 999 miles 26.8 1.0 S S S S
1,000 to 1,499 miles 38.2 0.9 28.0 – 30.1 1.6
1,500 to 1,999 miles 29.7 0.3 45.3 – 46.1 1.2
2,000 miles or more S S 30.5 0.3 31.1 5.1

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 11.6 – 15.0 – 16.6 –
Less than 50 miles 7.9 4.5 16.8 4.4 13.3 3.4
50 to 99 miles 11.1 1.2 29.9 2.3 36.3 1.7
100 to 249 miles 12.8 1.0 32.7 1.9 33.8 2.7
250 to 499 miles 14.3 1.7 26.0 0.3 25.6 2.7
500 to 749 miles 22.4 1.0 28.9 0.2 29.6 1.8
750 to 999 miles 40.7 1.1 S S S S
1,000 to 1,499 miles S S 28.5 – 30.8 1.6
1,500 to 1,999 miles 42.7 0.4 45.9 – 46.7 1.2
2,000 miles or more S S 30.3 0.3 30.8 5.1

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 12.3 – 15.3 – 15.9 –
Less than 50 miles 7.9 4.9 16.5 3.2 12.9 3.5
50 to 99 miles 11.1 1.3 25.2 1.7 24.6 1.4
100 to 249 miles 12.8 1.2 29.6 1.2 25.9 2.0
250 to 499 miles 16.0 1.7 26.1 0.4 25.8 3.1
500 to 749 miles 23.4 1.0 29.7 0.2 30.8 1.6
750 to 999 miles 45.9 1.1 S S S S
1,000 to 1,499 miles S S 27.0 – 27.3 0.7
1,500 to 1,999 miles 34.5 0.1 46.8 – 47.6 1.2
2,000 miles or more S S 30.2 0.3 30.8 5.8

Rail

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 S S S S S S
250 to 499 miles – – – – – –
500 to 749 miles S S S S S S
750 to 999 miles – – – – – –
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles – – – – – –
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 26.4 – 29.1 – 35.9 –
Less than 50 miles – – – – – –
50 to 99 miles S S S S S S
100 to 249 miles 26.0 9.7 S S 45.2 5.9
250 to 499 miles 34.9 6.9 37.1 6.0 40.4 4.6
500 to 749 miles 41.1 2.3 S S S S
750 to 999 miles S S 46.1 3.2 45.9 3.5
1,000 to 1,499 miles 42.8 10.1 46.7 10.2 48.9 10.2
1,500 to 1,999 miles S S S S S S
2,000 miles or more S S S S S S

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 20.3 – 25.0 – 42.9 –
Less than 50 miles 25.4 8.4 42.3 9.8 S S
50 to 99 miles S S 46.2 0.9 46.0 0.3
100 to 249 miles 35.3 4.7 22.9 3.7 21.3 1.4
250 to 499 miles 32.6 2.4 38.5 3.2 37.4 2.1
500 to 749 miles S S 30.6 2.1 30.8 3.5
750 to 999 miles 35.7 3.5 49.1 1.1 S S
1,000 to 1,499 miles 38.0 2.5 37.5 2.2 36.4 3.8
1,500 to 1,999 miles 41.9 1.4 32.1 0.6 32.4 2.7
2,000 miles or more 36.4 2.2 S S S S

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 20.5 – 26.9 – 42.9 –
Less than 50 miles 26.1 8.5 S S S S
50 to 99 miles S S 37.6 0.6 32.1 0.3
100 to 249 miles 35.3 4.7 22.9 3.5 21.3 1.3
250 to 499 miles 32.8 2.4 44.3 3.1 42.9 1.8
500 to 749 miles S S 30.6 2.0 30.8 3.4
750 to 999 miles 35.7 3.7 49.1 1.4 S S
1,000 to 1,499 miles 38.0 2.5 37.5 2.1 36.4 3.8
1,500 to 1,999 miles 41.9 1.4 32.1 0.6 32.4 2.6
2,000 miles or more 36.4 2.2 S S S S

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 – – – – – –
750 to 999 miles – – – – – –
1,000 to 1,499 miles – – – – – –
1,500 to 1,999 miles – – – – – –
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 24.6 – 26.6 – 49.5 –
Less than 50 miles 28.2 7.4 28.5 11.4 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 S S S S S S
1,500 to 1,999 miles – – – – – –
2,000 miles 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.
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