Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002
Monday, July 2, 2012
Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size 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
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 |
12.7 |
– |
20.8 |
– |
14.9 |
– |
13.7 |
Less than 50 lbs |
S |
S |
40.2 |
0.3 |
24.5 |
0.2 |
38.1 |
50 to 99 lbs |
S |
S |
29.2 |
0.1 |
17.2 |
– |
S |
100 to 499 lbs |
18.6 |
1.2 |
26.9 |
0.3 |
21.7 |
0.3 |
30.4 |
500 to 749 lbs |
41.2 |
1.0 |
23.2 |
– |
S |
S |
17.5 |
750 to 999 lbs |
29.8 |
0.6 |
32.1 |
– |
24.9 |
0.1 |
36.6 |
1,000 to 9,999 lbs |
16.4 |
3.0 |
32.7 |
2.5 |
22.8 |
3.0 |
22.0 |
10,000 to 49,999 lbs |
15.5 |
4.0 |
22.1 |
3.7 |
15.8 |
4.0 |
20.5 |
50,000 to 99,999 lbs |
31.1 |
3.0 |
28.0 |
5.6 |
30.9 |
3.7 |
10.5 |
100,000 lbs or more |
S |
S |
S |
S |
33.2 |
1.8 |
45.2 |
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 |
14.1 |
– |
20.3 |
– |
15.8 |
– |
22.4 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
S |
50 to 99 lbs |
S |
S |
41.1 |
0.1 |
18.9 |
– |
S |
100 to 499 lbs |
25.9 |
1.3 |
31.1 |
0.3 |
31.3 |
0.3 |
26.5 |
500 to 749 lbs |
S |
S |
28.5 |
– |
S |
S |
16.6 |
750 to 999 lbs |
38.6 |
0.7 |
33.2 |
– |
25.4 |
0.1 |
S |
1,000 to 9,999 lbs |
16.7 |
3.3 |
32.8 |
2.4 |
23.1 |
3.2 |
22.7 |
10,000 to 49,999 lbs |
15.6 |
4.8 |
22.7 |
4.0 |
16.3 |
4.1 |
23.9 |
50,000 to 99,999 lbs |
32.2 |
3.2 |
28.4 |
5.6 |
31.4 |
3.8 |
10.6 |
100,000 lbs or more |
S |
S |
27.6 |
0.7 |
35.1 |
1.9 |
14.3 |
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 |
12.3 |
– |
20.2 |
– |
13.4 |
– |
23.5 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
47.5 |
50 to 99 lbs |
S |
S |
41.8 |
0.1 |
19.8 |
– |
S |
100 to 499 lbs |
26.6 |
1.4 |
30.9 |
0.3 |
27.1 |
0.3 |
30.8 |
500 to 749 lbs |
S |
S |
28.6 |
– |
S |
S |
16.6 |
750 to 999 lbs |
38.7 |
0.7 |
33.2 |
– |
25.7 |
0.1 |
S |
1,000 to 9,999 lbs |
16.7 |
3.2 |
32.8 |
2.5 |
23.1 |
3.2 |
22.6 |
10,000 to 49,999 lbs |
15.6 |
5.3 |
22.7 |
4.0 |
16.3 |
4.3 |
23.9 |
50,000 to 99,999 lbs |
32.2 |
3.1 |
28.4 |
5.7 |
31.4 |
3.8 |
10.6 |
100,000 lbs or more |
S |
S |
35.7 |
0.8 |
36.2 |
2.1 |
23.8 |
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 |
25.5 |
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 |
– |
– |
– |
– |
– |
– |
– |
10,000 to 49,999 lbs |
– |
– |
– |
– |
– |
– |
– |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
24.0 |
All other 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 |
S |
S |
S |
S |
46.3 |
– |
18.9 |
Less than 50 lbs |
S |
S |
36.2 |
10.7 |
36.0 |
10.7 |
24.0 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
39.4 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
26.2 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
43.8 |
750 to 999 lbs |
– |
– |
– |
– |
– |
– |
– |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
30.0 |
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 |
– |
– |
– |
– |
– |
– |
– |
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 |
30.4 |
– |
25.7 |
– |
33.1 |
– |
26.3 |
Less than 50 lbs |
31.8 |
8.3 |
33.1 |
6.0 |
23.4 |
7.7 |
26.8 |
50 to 99 lbs |
36.7 |
2.7 |
25.5 |
3.5 |
30.8 |
3.7 |
26.4 |
100 to 499 lbs |
45.1 |
5.3 |
26.5 |
6.3 |
26.3 |
10.1 |
27.6 |
500 to 749 lbs |
S |
S |
S |
S |
47.1 |
1.4 |
32.8 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
S |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
30.3 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
29.8 |
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 |
31.2 |
– |
25.3 |
– |
19.8 |
– |
26.2 |
Less than 50 lbs |
31.8 |
7.9 |
33.1 |
4.8 |
23.4 |
4.6 |
26.8 |
50 to 99 lbs |
36.7 |
2.7 |
25.5 |
2.6 |
30.8 |
2.8 |
26.4 |
100 to 499 lbs |
45.1 |
4.9 |
26.5 |
4.9 |
26.5 |
5.9 |
27.6 |
500 to 749 lbs |
S |
S |
S |
S |
47.1 |
3.2 |
32.8 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
S |
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 |
– |
– |
– |
– |
– |
– |
– |
All 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 |
49.3 |
– |
41.7 |
– |
46.0 |
– |
22.3 |
Less than 50 lbs |
– |
– |
– |
– |
– |
– |
– |
50 to 99 lbs |
– |
– |
– |
– |
– |
– |
– |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
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 |
30.1 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
29.8 |
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 |
27.3 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
30.2 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
33.3 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
38.0 |
500 to 749 lbs |
– |
– |
– |
– |
– |
– |
– |
750 to 999 lbs |
– |
– |
– |
– |
– |
– |
– |
1,000 to 9,999 lbs |
S |
S |
43.9 |
8.9 |
45.7 |
8.4 |
26.3 |
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 |
31.6 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
31.6 |
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.