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 40.9 46.0 29.4 43.8
Less than 50 lbs 16.8 2.5 27.1 0.6 44.3 3.8 32.4
50 to 99 lbs 24.1 2.7 29.0 0.7 S S S
100 to 499 lbs 15.7 7.1 25.3 4.5 30.2 7.8 37.1
500 to 749 lbs 36.2 3.0 34.8 1.4 32.7 0.9 S
750 to 999 lbs 24.6 1.3 24.3 1.8 S S S
1,000 to 9,999 lbs S S 41.5 9.4 46.4 7.0 S
10,000 to 49,999 lbs S S S S 34.3 11.4 S
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 31.6

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 42.7 45.7 33.8 27.9
Less than 50 lbs 16.9 1.6 28.4 0.2 38.2 0.5 S
50 to 99 lbs 25.5 2.7 27.0 0.6 32.7 0.7 14.3
100 to 499 lbs 17.3 7.9 28.6 4.5 38.0 4.7 14.9
500 to 749 lbs 28.5 2.6 30.9 1.6 36.4 1.7 34.2
750 to 999 lbs 24.6 1.7 24.4 1.9 S S S
1,000 to 9,999 lbs S S 41.9 9.7 46.5 6.8 S
10,000 to 49,999 lbs S S S S 34.3 11.6 S
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 31.6

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 42.7 45.7 33.8 30.7
Less than 50 lbs 18.0 1.5 28.6 0.2 45.4 0.3 14.6
50 to 99 lbs 25.5 2.8 27.0 0.6 32.7 0.7 14.3
100 to 499 lbs 17.3 7.9 28.6 4.5 38.0 4.7 14.9
500 to 749 lbs 28.5 2.6 30.9 1.6 36.4 1.7 34.2
750 to 999 lbs 24.6 1.7 24.4 1.9 S S S
1,000 to 9,999 lbs S S 41.9 9.7 46.5 6.8 S
10,000 to 49,999 lbs S S S S 34.3 11.7 S
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 31.6

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 S S 45.0 42.1 30.9
Less than 50 lbs S S S S S S 46.5
50 to 99 lbs S S S S S S S
100 to 499 lbs 42.5 6.9 S S S S 32.6
500 to 749 lbs S S S S S S S
750 to 999 lbs S S S S S S 34.7
1,000 to 9,999 lbs S S S S 44.1 11.5 28.9
10,000 to 49,999 lbs S S 46.9 18.8 47.6 14.1 26.4
50,000 to 99,999 lbs
100,000 lbs or more S S S S S S 31.6

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 13.7 S S 41.8 11.6
Less than 50 lbs 18.2 0.8 28.4 0.4 44.5 0.2 14.2
50 to 99 lbs 25.5 2.0 27.0 1.1 32.7 0.7 14.3
100 to 499 lbs 17.9 4.4 29.1 7.3 41.6 5.1 13.1
500 to 749 lbs 22.5 1.8 31.1 2.0 37.2 2.3 34.8
750 to 999 lbs 23.9 1.2 20.8 1.9 40.8 1.1 29.0
1,000 to 9,999 lbs 27.4 5.7 41.4 10.8 S S 14.9
10,000 to 49,999 lbs 49.8 3.2 S S 50.0 15.2 S
50,000 to 99,999 lbs
100,000 lbs or more

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 S S S S S S 31.6
Less than 50 lbs S S S S S S 31.6
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

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

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
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

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 S S S S S S 26.1
Less than 50 lbs S S S S S S 26.1
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

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 S S S
Less than 50 lbs S S S
50 to 99 lbs S S S
100 to 499 lbs 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
50,000 to 99,999 lbs S S S
100,000 lbs or more 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 29.7 40.0 S S 14.8
Less than 50 lbs 26.4 6.7 42.9 6.1 S S 15.6
50 to 99 lbs 39.0 5.2 S S S S 28.8
100 to 499 lbs 43.5 3.9 46.3 6.8 S S 21.3
500 to 749 lbs S S S S S S 31.9
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs
10,000 to 49,999 lbs
50,000 to 99,999 lbs
100,000 lbs or more

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 29.7 40.0 S S 14.8
Less than 50 lbs 26.4 6.7 42.9 6.1 S S 15.6
50 to 99 lbs 39.0 5.2 S S S S 28.8
100 to 499 lbs 43.5 3.9 46.3 6.8 S S 21.3
500 to 749 lbs S S S S S S 31.9
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs
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
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

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
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

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
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 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 S S S S S S 21.0
Less than 50 lbs 35.5 17.5 S S S S 25.5
50 to 99 lbs S S S S S S S
100 to 499 lbs S S S S S S 38.6
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs S S S S S S 31.6
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 30.3
50,000 to 99,999 lbs
100,000 lbs 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, Individual State Data, December 2004.