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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 8.7 – 15.0 – 18.0 – 5.7
Less than 50 lbs 10.8 1.9 14.7 – 16.6 0.1 4.3
50 to 99 lbs 12.0 0.5 11.7 – 15.4 – 13.7
100 to 499 lbs 27.4 2.5 14.8 0.2 19.1 0.3 18.1
500 to 749 lbs 14.0 0.6 18.2 0.1 22.4 0.1 26.5
750 to 999 lbs 19.1 0.7 25.5 0.1 20.9 – 18.8
1,000 to 9,999 lbs 12.7 2.2 26.5 1.2 15.6 0.8 22.3
10,000 to 49,999 lbs 15.5 2.4 29.3 4.5 38.3 3.3 17.8
50,000 to 99,999 lbs 19.0 0.6 28.3 4.8 44.0 3.3 16.5
100,000 lbs or more 13.6 0.7 11.1 4.8 18.4 4.4 13.4

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 10.2 – 14.6 – 15.9 – 19.7
Less than 50 lbs 10.5 0.8 12.4 – 12.8 – 24.0
50 to 99 lbs 15.6 0.4 11.7 – 18.9 – 16.8
100 to 499 lbs 32.0 2.7 12.9 0.2 23.7 0.2 20.3
500 to 749 lbs 14.9 0.7 18.8 0.1 22.7 0.1 27.9
750 to 999 lbs 20.9 1.0 26.5 0.1 18.6 – 16.5
1,000 to 9,999 lbs 13.0 2.4 26.3 1.3 16.6 0.8 23.0
10,000 to 49,999 lbs 15.9 2.6 29.0 4.7 38.3 3.8 18.1
50,000 to 99,999 lbs 17.8 0.8 28.8 4.8 45.6 3.5 16.8
100,000 lbs or more 13.4 0.8 10.1 4.9 15.9 4.4 13.5

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 8.7 – 19.0 – 26.3 – 20.8
Less than 50 lbs 15.7 0.8 12.8 – 17.8 – 28.7
50 to 99 lbs 14.8 0.4 11.3 – 22.9 – 22.6
100 to 499 lbs 14.0 1.6 12.6 0.4 26.3 0.5 23.1
500 to 749 lbs 17.0 0.8 18.8 0.2 23.8 0.2 29.0
750 to 999 lbs 21.3 1.0 26.4 0.2 18.7 0.2 16.9
1,000 to 9,999 lbs 12.5 2.1 26.3 2.1 17.0 2.2 23.3
10,000 to 49,999 lbs 15.8 3.2 28.8 5.7 37.8 6.3 18.4
50,000 to 99,999 lbs 16.7 0.7 29.2 5.0 S S 17.8
100,000 lbs or more 26.6 0.4 17.7 2.7 31.7 2.2 S

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 14.2 – 17.4 – 34.3 – 7.4
Less than 50 lbs 21.7 0.9 20.9 – 26.2 – 16.8
50 to 99 lbs 24.0 0.3 23.3 – 26.2 – 33.1
100 to 499 lbs 20.1 1.8 26.1 0.2 33.7 0.5 11.0
500 to 749 lbs 28.8 1.0 33.7 0.1 30.7 0.3 11.1
750 to 999 lbs 39.8 1.7 25.0 – 20.0 0.2 13.7
1,000 to 9,999 lbs 20.3 2.7 18.0 1.2 21.1 2.2 12.9
10,000 to 49,999 lbs 17.7 2.8 36.8 7.2 43.8 4.7 8.8
50,000 to 99,999 lbs 17.6 1.2 21.4 6.7 9.0 2.2 31.6
100,000 lbs or more 33.5 0.8 37.9 5.2 39.4 3.1 S

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 7.9 – 26.1 – 33.3 – 16.1
Less than 50 lbs 22.0 1.5 16.0 – 24.0 – 28.0
50 to 99 lbs 17.6 0.6 10.6 – 15.7 – 13.3
100 to 499 lbs 15.4 2.9 17.0 0.5 8.1 0.5 12.7
500 to 749 lbs 13.5 0.9 25.6 0.4 15.7 0.4 20.3
750 to 999 lbs 21.0 1.0 33.4 0.3 23.1 0.5 35.1
1,000 to 9,999 lbs 17.9 3.8 31.0 3.2 19.1 5.9 16.2
10,000 to 49,999 lbs 21.2 6.1 29.2 6.9 24.7 8.4 20.8
50,000 to 99,999 lbs 27.4 1.1 48.5 4.6 S S 22.6
100,000 lbs or more 44.2 0.4 36.1 5.2 41.0 1.8 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 19.5 – 15.3 – 16.7 – 8.1
Less than 50 lbs – – – – – – –
50 to 99 lbs – – – – – – –
100 to 499 lbs S S S S S S 29.9
500 to 749 lbs – – – – – – –
750 to 999 lbs – – – – – – –
1,000 to 9,999 lbs S S S S S S 31.1
10,000 to 49,999 lbs S S S S S S 21.6
50,000 to 99,999 lbs S S 47.3 0.3 S S 25.0
100,000 lbs or more 13.5 7.3 15.3 0.6 16.5 0.7 8.5

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 42.9 – 38.9 – S S 2.3
Less than 50 lbs 22.7 9.1 20.7 5.3 18.2 6.2 2.6
50 to 99 lbs 32.2 4.2 36.8 2.2 40.9 2.7 4.5
100 to 499 lbs S S S S S S 5.1
500 to 749 lbs 37.9 2.2 26.1 3.4 28.7 4.0 12.7
750 to 999 lbs S S S S S S 26.7
1,000 to 9,999 lbs S S 22.0 4.9 30.8 4.8 17.9
10,000 to 49,999 lbs – – – – – – –
50,000 to 99,999 lbs S S S S S S 31.6
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 S 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 S 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 11.3 – 33.6 – 38.0 – 3.5
Less than 50 lbs 12.8 2.5 24.4 7.5 20.1 6.7 3.3
50 to 99 lbs 16.8 1.9 18.8 3.3 17.6 2.9 10.9
100 to 499 lbs 17.3 1.3 21.8 4.5 18.0 4.5 8.9
500 to 749 lbs 28.6 0.3 37.7 1.0 35.9 0.9 22.3
750 to 999 lbs 37.5 0.5 43.8 0.9 45.4 1.7 25.8
1,000 to 9,999 lbs S S S S S S 35.0
10,000 to 49,999 lbs 38.3 0.7 42.8 9.3 48.5 10.5 21.8
50,000 to 99,999 lbs S S S S S S 32.8
100,000 lbs or more 35.1 0.2 38.8 19.6 S S 18.7

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 11.6 – 19.4 – 16.1 – 3.3
Less than 50 lbs 12.8 2.5 24.4 3.3 20.1 3.6 3.2
50 to 99 lbs 16.8 2.0 18.8 3.5 17.2 3.7 10.9
100 to 499 lbs 17.3 1.4 20.2 3.3 18.1 3.1 8.1
500 to 749 lbs 28.6 0.3 38.9 1.2 40.1 1.1 18.7
750 to 999 lbs 37.7 0.5 43.9 1.7 45.6 1.7 25.1
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 – – – – – – –

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 37.1 – S S 44.5 – 21.2
Less than 50 lbs – – – – – – –
50 to 99 lbs – – – – – – –
100 to 499 lbs – – – – – – –
500 to 749 lbs – – – – – – –
750 to 999 lbs S S S S S S 31.6
1,000 to 9,999 lbs S S S S S S 31.6
10,000 to 49,999 lbs 41.4 13.2 S S S S 18.4
50,000 to 99,999 lbs S S S S S S 31.6
100,000 lbs or more S S S S S S 28.2

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 S S S S 25.8
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs S S S S S S 31.6
100 to 499 lbs S S S S S S 29.8
500 to 749 lbs S S S S S S 31.6
750 to 999 lbs – – – – – – –
1,000 to 9,999 lbs – – – – – – –
10,000 to 49,999 lbs S S S S S S 31.6
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 44.8 – 44.8 – 45.0 – 25.8
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 44.8 – 44.8 – 45.0 – 25.8

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 35.6
Less than 50 lbs S S S S S S 31.6
50 to 99 lbs – – – – – – –
100 to 499 lbs S S S S S S 39.9
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 S S S S S S 31.6
50,000 to 99,999 lbs S S S S S S 31.6
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 16.3 – 40.2 – 38.5 – 34.4
Less than 50 lbs 26.2 3.7 34.1 1.4 S S 36.0
50 to 99 lbs 35.7 1.0 S S 32.6 0.5 S
100 to 499 lbs 32.3 6.5 S S 36.3 9.0 S
500 to 749 lbs 33.7 4.3 29.4 1.2 33.4 0.1 S
750 to 999 lbs S S 45.5 2.3 S S S
1,000 to 9,999 lbs 42.5 5.4 38.2 7.3 29.6 12.3 34.3
10,000 to 49,999 lbs 31.8 6.0 S S S S 41.8
50,000 to 99,999 lbs S S S S S S S
100,000 lbs or more S 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, Individual State Data, December 2004.
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