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 |
10.0 |
– |
33.4 |
– |
19.7 |
– |
37.7 |
Less than 50 lbs |
26.0 |
2.8 |
39.5 |
0.2 |
23.1 |
0.1 |
S |
50 to 99 lbs |
26.1 |
0.7 |
36.8 |
0.1 |
35.0 |
0.1 |
45.5 |
100 to 499 lbs |
21.0 |
2.0 |
29.7 |
0.6 |
30.3 |
0.7 |
40.0 |
500 to 749 lbs |
25.4 |
0.8 |
20.8 |
0.1 |
22.2 |
0.3 |
24.8 |
750 to 999 lbs |
24.4 |
0.7 |
30.5 |
0.2 |
23.9 |
0.1 |
32.6 |
1,000 to 9,999 lbs |
11.1 |
3.1 |
15.4 |
2.8 |
25.7 |
3.7 |
17.5 |
10,000 to 49,999 lbs |
16.9 |
3.8 |
45.4 |
7.5 |
27.4 |
5.4 |
45.3 |
50,000 to 99,999 lbs |
37.8 |
2.8 |
39.8 |
5.5 |
28.9 |
4.7 |
48.6 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
26.0 |
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 |
10.8 |
– |
33.7 |
– |
21.9 |
– |
19.0 |
Less than 50 lbs |
42.8 |
1.8 |
S |
S |
38.7 |
– |
S |
50 to 99 lbs |
40.9 |
0.6 |
48.8 |
– |
42.4 |
– |
S |
100 to 499 lbs |
23.3 |
1.7 |
37.3 |
0.5 |
32.9 |
0.7 |
28.5 |
500 to 749 lbs |
26.7 |
0.9 |
21.4 |
0.2 |
22.2 |
0.3 |
25.2 |
750 to 999 lbs |
28.0 |
0.8 |
31.6 |
0.2 |
24.0 |
0.1 |
33.8 |
1,000 to 9,999 lbs |
10.8 |
3.4 |
15.5 |
2.9 |
26.1 |
3.7 |
17.9 |
10,000 to 49,999 lbs |
17.3 |
3.9 |
45.5 |
7.5 |
28.6 |
5.4 |
46.2 |
50,000 to 99,999 lbs |
44.3 |
2.8 |
40.4 |
5.8 |
36.9 |
3.5 |
22.4 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
26.0 |
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 |
11.1 |
– |
33.8 |
– |
22.1 |
– |
22.5 |
Less than 50 lbs |
49.6 |
1.7 |
S |
S |
35.5 |
– |
S |
50 to 99 lbs |
40.2 |
0.6 |
49.5 |
– |
29.3 |
– |
S |
100 to 499 lbs |
23.0 |
1.7 |
37.7 |
0.5 |
33.1 |
0.6 |
34.7 |
500 to 749 lbs |
26.7 |
0.9 |
21.4 |
0.2 |
22.1 |
0.3 |
25.2 |
750 to 999 lbs |
28.0 |
0.8 |
31.6 |
0.2 |
24.0 |
0.1 |
33.8 |
1,000 to 9,999 lbs |
11.1 |
3.4 |
15.5 |
3.0 |
26.2 |
3.6 |
18.0 |
10,000 to 49,999 lbs |
17.3 |
3.9 |
45.5 |
7.4 |
28.6 |
5.4 |
46.2 |
50,000 to 99,999 lbs |
44.3 |
2.8 |
40.4 |
5.8 |
36.9 |
4.0 |
22.4 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
30.1 |
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 |
26.9 |
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 |
S |
S |
S |
S |
S |
S |
26.9 |
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 |
45.2 |
– |
S |
S |
S |
S |
19.6 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
18.7 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
23.1 |
100 to 499 lbs |
40.1 |
7.8 |
S |
S |
S |
S |
25.9 |
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 |
– |
– |
– |
– |
– |
– |
– |
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 |
24.3 |
– |
41.5 |
– |
S |
S |
15.3 |
Less than 50 lbs |
25.4 |
7.6 |
21.7 |
9.9 |
25.0 |
11.5 |
13.5 |
50 to 99 lbs |
28.8 |
1.8 |
28.9 |
6.6 |
34.7 |
6.3 |
25.4 |
100 to 499 lbs |
41.6 |
3.0 |
S |
S |
44.6 |
6.1 |
S |
500 to 749 lbs |
S |
S |
49.1 |
1.0 |
S |
S |
32.6 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
26.2 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
30.6 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
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 |
26.5 |
– |
40.0 |
– |
31.3 |
– |
15.2 |
Less than 50 lbs |
25.4 |
3.9 |
21.7 |
7.2 |
25.0 |
5.0 |
13.5 |
50 to 99 lbs |
28.8 |
2.1 |
28.9 |
4.8 |
34.7 |
3.7 |
25.4 |
100 to 499 lbs |
41.7 |
3.0 |
S |
S |
45.4 |
4.3 |
S |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
28.1 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
26.2 |
1,000 to 9,999 lbs |
– |
– |
– |
– |
– |
– |
– |
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 |
S |
S |
S |
S |
S |
S |
25.0 |
Less than 50 lbs |
– |
– |
– |
– |
– |
– |
– |
50 to 99 lbs |
– |
– |
– |
– |
– |
– |
– |
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 |
30.6 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
27.9 |
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 |
45.2 |
– |
31.1 |
– |
S |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
S |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
S |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
S |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
28.2 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
34.1 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
26.9 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
33.1 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
30.0 |
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, Metropolitan Data,
December 2004.