Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for State of Origin: 2002

Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for State 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 13.8 10.3 6.4 14.3
Less than 50 lbs 11.6 1.0 11.2 22.8 17.0
50 to 99 lbs 24.2 0.6 7.4 19.1 15.1
100 to 499 lbs 12.4 0.7 9.9 12.3 16.4
500 to 749 lbs 16.8 0.7 13.3 4.4 14.7
750 to 999 lbs 11.7 0.3 13.6 9.1 14.4
1,000 to 9,999 lbs 5.1 1.3 8.0 0.3 9.7 0.5 11.3
10,000 to 49,999 lbs 29.8 4.3 12.1 1.6 12.6 3.6 16.6
50,000 to 99,999 lbs 20.8 1.6 10.6 3.0 7.5 0.7 16.4
100,000 lbs or more 20.7 2.2 17.7 3.2 11.1 3.5 12.2

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 15.3 10.6 6.5 10.4
Less than 50 lbs 21.3 0.7 18.1 14.1 26.7
50 to 99 lbs 34.4 0.7 11.0 11.9 13.3
100 to 499 lbs 16.3 0.7 10.2 12.9 17.9
500 to 749 lbs 18.0 0.8 11.6 5.5 16.6
750 to 999 lbs 12.4 0.3 12.0 10.1 13.1
1,000 to 9,999 lbs 6.1 1.5 7.9 0.3 8.1 0.6 11.3
10,000 to 49,999 lbs 30.5 4.5 12.5 1.6 11.0 3.7 15.7
50,000 to 99,999 lbs 20.7 1.8 10.3 3.1 6.4 0.7 15.8
100,000 lbs or more 21.0 2.5 18.4 3.0 13.0 3.9 13.3

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 18.6 14.2 11.0 10.3
Less than 50 lbs 22.9 0.8 18.5 18.2 17.3
50 to 99 lbs 35.0 0.8 11.1 11.6 13.0
100 to 499 lbs 16.5 0.9 10.2 12.7 0.1 18.4
500 to 749 lbs 18.2 1.0 11.7 5.9 16.5
750 to 999 lbs 12.3 0.4 12.1 9.7 12.8
1,000 to 9,999 lbs 6.3 1.8 7.9 0.4 8.1 0.8 11.3
10,000 to 49,999 lbs 30.8 4.1 12.6 2.5 11.5 2.5 16.1
50,000 to 99,999 lbs 26.6 2.1 10.6 3.9 8.1 1.6 19.1
100,000 lbs or more 26.6 0.3 S S 47.3 2.7 28.4

For-hire 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 28.2 21.1 15.0 6.1
Less than 50 lbs 40.2 0.5 28.2 23.1 34.5
50 to 99 lbs 45.1 1.1 26.8 18.1 33.9
100 to 499 lbs 23.8 1.3 15.0 0.2 15.6 0.2 12.0
500 to 749 lbs 34.3 1.3 17.0 0.1 9.2 17.6
750 to 999 lbs 17.7 0.5 18.8 14.4 0.1 16.3
1,000 to 9,999 lbs 8.2 2.8 6.7 0.7 10.1 1.3 3.6
10,000 to 49,999 lbs 40.7 4.8 9.9 5.4 17.3 4.1 5.9
50,000 to 99,999 lbs 26.5 1.6 26.7 5.1 15.3 2.1 21.4
100,000 lbs or more 33.1 0.6 S S S S 19.9

Private 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 8.9 13.9 12.3 12.3
Less than 50 lbs 26.3 2.1 20.0 26.2 17.3
50 to 99 lbs 18.3 0.6 12.4 14.7 14.1
100 to 499 lbs 12.8 1.7 15.9 0.1 10.3 0.1 29.2
500 to 749 lbs 15.1 0.9 17.8 28.9 0.1 25.5
750 to 999 lbs 17.5 0.4 16.3 21.5 0.1 15.3
1,000 to 9,999 lbs 12.5 3.8 10.8 0.7 11.5 2.3 19.8
10,000 to 49,999 lbs 14.0 3.1 21.0 5.6 18.1 5.1 15.3
50,000 to 99,999 lbs 41.2 3.1 20.1 4.1 21.7 2.5 12.6
100,000 lbs or more 42.1 0.1 41.0 5.9 44.2 4.8 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 34.9 13.3 15.2 11.7
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S S
10,000 to 49,999 lbs S S S S S S 28.7
50,000 to 99,999 lbs S S 36.1 0.4 34.0 1.3 24.3
100,000 lbs or more 33.4 5.3 12.7 0.9 15.6 1.8 13.0

Water

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 36.7 31.4 33.5 18.4
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more 37.4 10.4 31.4 10.5 33.5 10.5 18.3

Shallow draft

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 36.7 31.4 33.5 18.4
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more 37.4 10.4 31.4 10.5 33.5 10.5 18.3

Great Lakes

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
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

Deep draft

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
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

Air (including truck and air)

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 21.9 S S S S 4.0
Less than 50 lbs 21.7 5.9 24.6 5.0 25.3 4.4 4.8
50 to 99 lbs 27.6 5.3 30.8 2.9 27.5 2.4 8.6
100 to 499 lbs 28.1 6.6 18.6 7.9 24.4 8.0 9.4
500 to 749 lbs 26.1 2.0 34.2 4.5 34.8 4.4 19.4
750 to 999 lbs S S S S S S 30.3
1,000 to 9,999 lbs 48.7 5.5 S S S S 22.4
10,000 to 49,999 lbs S S S S S S 28.9
50,000 to 99,999 lbs
100,000 lbs or more

Pipeline

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 25.3 22.7 S S S
Less than 50 lbs S S S
50 to 99 lbs S S S
100 to 499 lbs S S S S S S S
500 to 749 lbs S S S
750 to 999 lbs S S S
1,000 to 9,999 lbs S S S
10,000 to 49,999 lbs S S S S S S S
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more 25.4 0.5 22.8 0.4 S S S

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 13.2 29.7 29.9 6.9
Less than 50 lbs 17.7 3.4 25.7 3.2 26.5 2.6 7.2
50 to 99 lbs 16.5 1.3 20.3 2.1 25.3 2.0 7.9
100 to 499 lbs 23.3 3.1 20.6 3.7 22.9 3.0 7.3
500 to 749 lbs 32.5 1.0 35.4 0.7 49.1 0.5 31.6
750 to 999 lbs 27.8 0.5 34.2 0.2 35.7 0.3 25.9
1,000 to 9,999 lbs 48.0 1.3 S S S S S
10,000 to 49,999 lbs 41.2 2.8 S S 49.8 7.9 16.7
50,000 to 99,999 lbs S S S S S S 29.9
100,000 lbs or more S S 37.8 15.6 36.8 13.7 22.1

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 14.5 19.6 22.5 6.9
Less than 50 lbs 17.7 4.0 25.7 3.9 26.5 4.0 7.2
50 to 99 lbs 16.5 1.4 20.3 1.8 25.3 2.0 7.7
100 to 499 lbs 23.5 3.0 21.0 2.7 24.0 3.2 7.9
500 to 749 lbs 32.2 1.0 36.9 1.7 S S 33.3
750 to 999 lbs 27.8 0.5 34.2 1.1 35.7 1.0 25.9
1,000 to 9,999 lbs S S S S S S 39.0
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

Truck and 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 25.6 32.9 34.1 19.6
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs 32.9 12.6 S S S S 19.9
50,000 to 99,999 lbs S S S S S S 29.9
100,000 lbs or more S S 37.8 17.2 36.8 15.3 22.1

Truck and water

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 50.0 47.0 27.0
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs S S S S S S 30.9
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs S S S S S S 29.9
50,000 to 99,999 lbs
100,000 lbs or more

Rail and water

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
Less than 50 lbs
50 to 99 lbs
100 to 499 lbs
500 to 749 lbs
750 to 999 lbs
1,000 to 9,999 lbs
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

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 S S S S 30.2
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
1,000 to 9,999 lbs S S S S S S 30.1
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

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 19.8 42.3 47.0 S
Less than 50 lbs 28.9 3.2 37.8 0.3 38.2 0.1 S
50 to 99 lbs 33.4 0.7 48.1 0.1 S S 23.2
100 to 499 lbs 42.2 2.6 S S S S S
500 to 749 lbs S S S S S S S
750 to 999 lbs 46.2 0.7 S S S S S
1,000 to 9,999 lbs 21.9 9.7 35.8 13.0 S S 26.4
10,000 to 49,999 lbs 34.2 7.1 S S 49.9 9.7 47.6
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more S S S S S S 30.3

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, Individual State Data, December 2004.