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 6.1 8.9 10.0
Less than 50 miles 15.1 2.4 18.4 3.5 24.3 0.4
50 to 99 miles 19.5 2.1 19.4 1.7 19.4 0.4
100 to 249 miles 13.3 1.2 21.3 1.5 24.2 0.7
250 to 499 miles 14.6 1.4 18.6 2.7 21.4 5.5
500 to 749 miles 13.3 0.9 13.6 3.0 14.8 2.9
750 to 999 miles 13.8 2.1 24.9 2.5 27.2 5.1
1,000 to 1,499 miles 10.0 1.6 23.1 1.9 23.0 4.0
1,500 to 1,999 miles 30.9 0.8 S S S S
2,000 miles or more 35.1 S S 38.3

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 7.7 10.1 10.7
Less than 50 miles 16.5 2.2 18.2 4.3 24.3 0.9
50 to 99 miles 19.7 2.3 19.4 2.1 19.5 1.1
100 to 249 miles 14.3 1.1 21.3 1.8 24.2 0.9
250 to 499 miles 16.6 1.6 34.5 2.0 38.7 2.2
500 to 749 miles 16.4 1.0 15.6 2.4 15.8 4.8
750 to 999 miles 12.3 1.9 26.5 2.3 31.2 5.7
1,000 to 1,499 miles 10.0 1.8 23.7 3.0 23.8 6.5
1,500 to 1,999 miles 16.6 0.3 S S S S
2,000 miles or more S S S S S S

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 9.2 19.3 37.3
Less than 50 miles 14.3 1.9 23.0 5.3 26.0 2.6
50 to 99 miles 21.1 2.8 22.2 2.8 22.3 1.7
100 to 249 miles 13.7 1.2 27.2 2.2 29.8 2.5
250 to 499 miles 17.5 1.6 13.0 1.5 11.3 2.5
500 to 749 miles 19.3 1.1 48.1 1.1 S S
750 to 999 miles 16.9 1.9 30.5 0.6 30.6 3.3
1,000 to 1,499 miles 9.7 1.4 32.0 1.7 32.9 5.0
1,500 to 1,999 miles 22.1 0.4 S S S S
2,000 miles or more S S S S S S

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 22.2 9.0 19.7
Less than 50 miles S S 20.0 5.4 29.7 1.1
50 to 99 miles 28.3 2.1 28.9 4.3 29.0 2.1
100 to 249 miles 39.1 3.6 40.6 2.5 49.1 1.3
250 to 499 miles 48.0 4.2 49.3 4.2 S S
500 to 749 miles 16.2 4.4 25.0 5.0 24.8 8.6
750 to 999 miles 26.6 1.1 40.3 0.9 39.6 1.5
1,000 to 1,499 miles 32.6 5.3 29.5 5.0 29.1 9.2
1,500 to 1,999 miles 27.8 0.9 27.1 0.1 25.9 0.8
2,000 miles or more

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 27.4 25.5 30.4
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 31.1 3.4 S S S S
500 to 749 miles 24.1 11.1 30.8 11.6 31.1 13.7
750 to 999 miles 46.7 14.9 S S S S
1,000 to 1,499 miles S S 44.8 2.9 38.0 4.6
1,500 to 1,999 miles 44.5 2.0 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 20.5 15.1 17.2
Less than 50 miles S S S S S S
50 to 99 miles 29.7 1.2 28.9 29.9
100 to 249 miles 25.0 2.1 22.2 25.6
250 to 499 miles 15.8 6.0 30.5 13.3 30.6 13.4
500 to 749 miles 23.4 1.5 46.6 8.4 47.6 7.4
750 to 999 miles 26.8 4.0 38.9 7.0 42.2 9.3
1,000 to 1,499 miles 26.2 2.8 S S S S
1,500 to 1,999 miles S S 19.6 19.6
2,000 miles or more 49.9 0.3 44.4 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 23.2 19.0 19.0
Less than 50 miles 30.3 0.6 33.4 0.6 44.0
50 to 99 miles 29.7 2.4 28.9 1.3 29.9 0.2
100 to 249 miles 25.0 2.3 22.2 2.0 25.6 0.6
250 to 499 miles 20.4 1.4 25.6 1.7 30.2 1.3
500 to 749 miles 27.0 1.7 38.0 2.8 37.8 2.2
750 to 999 miles 19.3 2.5 20.7 3.1 20.8 3.1
1,000 to 1,499 miles 26.4 2.9 18.0 2.8 19.1 2.7
1,500 to 1,999 miles S S 19.6 1.0 19.6 1.6
2,000 miles or more S S 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 27.3 15.1 17.2
Less than 50 miles S S S S S S
50 to 99 miles
100 to 249 miles
250 to 499 miles 35.4 14.7 30.6 13.4 30.6 13.6
500 to 749 miles 42.0 7.5 46.8 8.5 47.7 7.5
750 to 999 miles S S 39.0 7.1 42.3 9.3
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

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 S S S S S S
Less than 50 miles S S S S S S
50 to 99 miles 31.4 1.3 S S S S
100 to 249 miles 46.6 10.1 37.1 11.7 38.1 13.9
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 S S S S S S
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.