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 |
– |
14.2 |
– |
13.9 |
– |
28.0 |
Less than 50 lbs |
39.6 |
2.6 |
33.8 |
– |
S |
S |
S |
50 to 99 lbs |
27.1 |
0.5 |
29.9 |
– |
29.7 |
– |
S |
100 to 499 lbs |
30.6 |
2.3 |
28.2 |
0.3 |
47.6 |
0.2 |
38.1 |
500 to 749 lbs |
36.3 |
1.5 |
29.6 |
0.1 |
S |
S |
26.5 |
750 to 999 lbs |
38.0 |
1.1 |
30.8 |
0.1 |
S |
S |
39.4 |
1,000 to 9,999 lbs |
20.3 |
4.3 |
15.5 |
0.8 |
31.1 |
1.9 |
26.7 |
10,000 to 49,999 lbs |
26.6 |
4.9 |
19.2 |
4.6 |
25.6 |
10.0 |
28.0 |
50,000 to 99,999 lbs |
27.1 |
4.6 |
22.1 |
5.1 |
28.5 |
4.4 |
22.0 |
100,000 lbs or more |
35.1 |
1.0 |
30.2 |
6.5 |
38.1 |
9.8 |
23.7 |
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 |
14.3 |
– |
18.8 |
– |
16.4 |
– |
36.9 |
Less than 50 lbs |
28.4 |
2.1 |
35.9 |
0.1 |
S |
S |
S |
50 to 99 lbs |
30.9 |
0.6 |
32.7 |
0.1 |
42.1 |
0.1 |
16.5 |
100 to 499 lbs |
31.4 |
2.5 |
29.8 |
0.5 |
34.6 |
0.9 |
16.1 |
500 to 749 lbs |
23.3 |
0.8 |
30.3 |
0.2 |
47.0 |
0.6 |
17.9 |
750 to 999 lbs |
42.9 |
1.3 |
31.7 |
0.2 |
S |
S |
30.2 |
1,000 to 9,999 lbs |
25.4 |
6.0 |
17.9 |
2.1 |
28.8 |
4.7 |
18.6 |
10,000 to 49,999 lbs |
33.7 |
4.5 |
20.8 |
4.5 |
26.6 |
5.5 |
19.4 |
50,000 to 99,999 lbs |
28.1 |
5.8 |
23.7 |
4.8 |
19.7 |
6.3 |
29.3 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
33.1 |
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 |
14.7 |
– |
19.2 |
– |
15.5 |
– |
13.0 |
Less than 50 lbs |
29.1 |
2.5 |
36.2 |
0.1 |
38.4 |
0.1 |
11.9 |
50 to 99 lbs |
30.9 |
0.7 |
32.8 |
0.1 |
46.1 |
0.1 |
13.9 |
100 to 499 lbs |
31.8 |
2.7 |
29.9 |
0.5 |
41.3 |
1.0 |
14.5 |
500 to 749 lbs |
24.0 |
0.8 |
30.5 |
0.2 |
S |
S |
18.6 |
750 to 999 lbs |
34.6 |
0.6 |
30.5 |
0.2 |
S |
S |
24.0 |
1,000 to 9,999 lbs |
25.4 |
6.2 |
17.9 |
2.1 |
29.1 |
4.8 |
19.1 |
10,000 to 49,999 lbs |
37.2 |
4.5 |
21.4 |
4.3 |
20.7 |
3.6 |
5.2 |
50,000 to 99,999 lbs |
28.1 |
5.8 |
23.7 |
4.7 |
19.7 |
6.3 |
29.3 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
33.1 |
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 |
– |
– |
– |
– |
– |
– |
– |
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 |
– |
– |
– |
– |
– |
– |
– |
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 |
44.6 |
– |
S |
S |
S |
S |
26.9 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
28.7 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
39.8 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
28.4 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
29.8 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
29.2 |
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 |
23.6 |
– |
26.3 |
– |
14.9 |
– |
41.6 |
Less than 50 lbs |
S |
S |
38.9 |
– |
S |
S |
48.8 |
50 to 99 lbs |
42.2 |
0.8 |
37.4 |
– |
S |
S |
22.1 |
100 to 499 lbs |
36.6 |
2.0 |
31.7 |
0.2 |
S |
S |
31.0 |
500 to 749 lbs |
S |
S |
43.3 |
0.2 |
S |
S |
43.7 |
750 to 999 lbs |
S |
S |
49.9 |
0.1 |
S |
S |
32.8 |
1,000 to 9,999 lbs |
S |
S |
24.3 |
3.2 |
43.1 |
3.3 |
29.3 |
10,000 to 49,999 lbs |
34.3 |
9.9 |
11.2 |
12.3 |
26.2 |
10.2 |
25.3 |
50,000 to 99,999 lbs |
29.8 |
3.1 |
34.3 |
3.3 |
33.5 |
3.5 |
42.3 |
100,000 lbs or more |
47.5 |
5.3 |
38.4 |
15.5 |
38.7 |
10.4 |
23.9 |
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 |
S |
S |
S |
S |
S |
S |
32.2 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
30.3 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
34.0 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
39.2 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
33.7 |
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 |
– |
– |
– |
– |
– |
– |
– |
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 |
29.6 |
– |
26.3 |
– |
15.0 |
– |
S |
Less than 50 lbs |
49.9 |
1.6 |
S |
S |
47.5 |
– |
23.1 |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
25.1 |
100 to 499 lbs |
S |
S |
47.1 |
0.2 |
S |
S |
30.3 |
500 to 749 lbs |
42.4 |
2.4 |
42.6 |
0.2 |
49.4 |
0.2 |
S |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
30.5 |
1,000 to 9,999 lbs |
S |
S |
24.3 |
3.2 |
43.1 |
3.3 |
29.3 |
10,000 to 49,999 lbs |
34.3 |
8.8 |
11.2 |
12.2 |
26.2 |
10.2 |
25.3 |
50,000 to 99,999 lbs |
29.8 |
3.5 |
34.3 |
3.4 |
33.5 |
3.5 |
42.3 |
100,000 lbs or more |
47.5 |
7.7 |
38.4 |
15.5 |
38.7 |
10.4 |
23.9 |
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 |
48.5 |
– |
S |
S |
S |
S |
S |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
S |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
36.9 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
48.2 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
30.8 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
1,000 to 9,999 lbs |
S |
S |
49.4 |
16.8 |
S |
S |
34.7 |
10,000 to 49,999 lbs |
– |
– |
– |
– |
– |
– |
– |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
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.