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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 8.4 – 12.7 – 18.8 –
Less than 50 miles 11.7 3.9 16.5 4.1 17.9 1.8
50 to 99 miles 30.6 1.7 14.1 0.8 15.8 0.5
100 to 249 miles 9.9 0.9 19.2 1.9 22.0 3.2
250 to 499 miles 10.2 1.7 23.1 1.1 25.9 1.9
500 to 749 miles 17.0 1.2 32.2 0.8 31.3 2.1
750 to 999 miles 15.5 0.3 26.3 0.1 24.6 0.4
1,000 to 1,499 miles 27.0 1.1 23.3 0.2 25.3 3.5
1,500 to 1,999 miles 24.1 0.4 31.5 0.2 31.8 1.5
2,000 miles or more 36.3 0.3 32.6 – 32.8 1.1

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 9.6 – 13.1 – 21.3 –
Less than 50 miles 12.4 4.0 17.8 4.6 18.4 2.7
50 to 99 miles 33.0 1.9 14.2 0.8 16.0 0.6
100 to 249 miles 12.3 0.9 19.5 2.0 19.8 2.2
250 to 499 miles 13.5 2.1 23.7 1.2 27.0 2.2
500 to 749 miles 19.7 1.2 36.1 0.9 35.1 2.4
750 to 999 miles 18.0 0.3 30.3 0.1 28.7 0.5
1,000 to 1,499 miles 19.8 0.5 29.6 0.3 32.0 3.8
1,500 to 1,999 miles 16.9 0.2 39.8 0.2 40.7 1.5
2,000 miles or more 32.2 – 40.8 – 41.2 0.6

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 10.4 – 10.9 – 20.1 –
Less than 50 miles 13.2 4.1 14.0 4.5 18.7 3.2
50 to 99 miles 33.7 2.1 16.5 1.1 17.4 1.0
100 to 249 miles 13.3 1.0 26.0 2.4 27.1 2.8
250 to 499 miles 13.8 2.2 18.2 0.8 18.0 2.0
500 to 749 miles 21.7 0.9 32.8 0.6 32.8 1.8
750 to 999 miles 20.1 0.3 33.6 0.1 31.7 0.6
1,000 to 1,499 miles 19.3 0.5 33.5 0.3 36.0 4.6
1,500 to 1,999 miles 18.7 0.2 48.4 0.2 49.4 2.2
2,000 miles or more 34.9 0.1 38.5 – 38.6 0.5

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 15.6 – 30.7 – 32.9 –
Less than 50 miles 20.7 2.1 31.7 1.8 34.9 0.1
50 to 99 miles S S S S 49.2 0.4
100 to 249 miles 23.1 2.5 34.4 4.3 28.2 2.7
250 to 499 miles 20.9 4.9 42.6 4.3 48.0 4.5
500 to 749 miles 23.5 5.9 41.5 4.4 38.8 4.4
750 to 999 miles 37.6 1.3 30.7 0.9 31.8 1.9
1,000 to 1,499 miles 36.8 1.4 24.2 1.1 23.9 2.1
1,500 to 1,999 miles 36.8 1.1 29.3 0.8 31.0 3.0
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 39.6 – S S S S
Less than 50 miles S S S S 38.5 16.3
50 to 99 miles S S S S S S
100 to 249 miles 46.2 5.7 S S S S
250 to 499 miles 44.9 7.9 S S S S
500 to 749 miles 38.3 0.4 33.4 0.5 36.1 0.8
750 to 999 miles S S 46.2 0.1 45.9 0.2
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 39.1 4.4 35.5 1.6 34.9 4.6
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 28.1 – 26.1 – 23.9 –
Less than 50 miles 26.3 3.0 32.0 2.0 38.5 0.1
50 to 99 miles 26.5 1.6 46.5 0.7 47.5 –
100 to 249 miles 20.3 3.4 S S S S
250 to 499 miles 22.3 5.1 17.9 7.7 19.7 7.4
500 to 749 miles 47.0 2.8 S S S S
750 to 999 miles 32.4 1.4 30.7 0.9 31.6 1.2
1,000 to 1,499 miles 44.8 3.5 33.6 5.6 33.4 7.2
1,500 to 1,999 miles S S 24.6 4.9 24.5 8.4
2,000 miles or more S S 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 18.6 – 22.9 – 17.6 –
Less than 50 miles 27.1 3.2 38.5 4.6 46.2 0.7
50 to 99 miles 26.3 2.1 38.6 2.4 37.8 0.7
100 to 249 miles 21.4 2.2 36.9 3.6 32.3 2.2
250 to 499 miles 19.4 0.9 16.3 2.8 12.7 2.3
500 to 749 miles 26.3 1.6 19.6 0.7 19.1 1.1
750 to 999 miles 23.9 0.5 23.6 0.7 23.1 1.5
1,000 to 1,499 miles 34.3 2.5 18.2 1.6 19.4 3.2
1,500 to 1,999 miles 42.3 1.1 22.6 1.1 22.7 3.8
2,000 miles or more 29.7 0.6 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 43.7 – 30.5 – 25.4 –
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 29.5 11.0 21.3 10.0 22.2 10.0
500 to 749 miles S S S S S S
750 to 999 miles 41.6 3.3 34.6 1.2 35.2 1.4
1,000 to 1,499 miles S S 35.1 6.8 34.9 8.0
1,500 to 1,999 miles S S 25.3 9.7 25.1 10.4
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 37.0 – 47.9 – S S
Less than 50 miles 44.5 9.8 45.3 12.6 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 35.4 2.9 S S S S
500 to 749 miles S S 47.8 3.9 46.8 6.1
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 47.2 0.1 S S S S
2,000 miles or more 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.
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