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 |
15.9 |
– |
29.4 |
– |
15.4 |
– |
12.8 |
Less than 50 lbs |
29.0 |
2.4 |
25.7 |
– |
21.8 |
– |
13.8 |
50 to 99 lbs |
32.6 |
0.7 |
23.0 |
– |
30.9 |
– |
20.5 |
100 to 499 lbs |
15.4 |
1.0 |
23.2 |
0.2 |
19.5 |
0.3 |
17.1 |
500 to 749 lbs |
18.2 |
0.4 |
32.2 |
– |
24.4 |
0.1 |
16.0 |
750 to 999 lbs |
20.6 |
0.2 |
29.5 |
0.1 |
29.0 |
0.2 |
13.8 |
1,000 to 9,999 lbs |
17.3 |
1.3 |
30.4 |
1.6 |
24.1 |
2.2 |
11.3 |
10,000 to 49,999 lbs |
19.4 |
4.7 |
20.9 |
6.1 |
14.5 |
3.8 |
18.7 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
46.7 |
2.3 |
S |
100,000 lbs or more |
S |
S |
42.3 |
– |
47.4 |
0.6 |
24.8 |
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 |
17.2 |
– |
29.6 |
– |
15.7 |
– |
15.5 |
Less than 50 lbs |
27.0 |
1.2 |
24.6 |
– |
14.3 |
– |
34.5 |
50 to 99 lbs |
18.3 |
0.2 |
23.8 |
– |
34.7 |
– |
S |
100 to 499 lbs |
16.6 |
0.9 |
21.5 |
0.2 |
20.0 |
0.3 |
17.8 |
500 to 749 lbs |
20.0 |
0.3 |
35.5 |
– |
24.8 |
0.1 |
12.4 |
750 to 999 lbs |
21.7 |
0.2 |
30.6 |
0.1 |
29.7 |
0.2 |
14.1 |
1,000 to 9,999 lbs |
17.4 |
1.3 |
31.3 |
1.7 |
24.5 |
2.0 |
10.6 |
10,000 to 49,999 lbs |
19.5 |
3.9 |
20.7 |
6.2 |
14.5 |
4.2 |
18.6 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
S |
100,000 lbs or more |
S |
S |
42.3 |
0.1 |
47.4 |
0.7 |
24.8 |
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 |
17.4 |
– |
29.6 |
– |
16.1 |
– |
13.2 |
Less than 50 lbs |
29.7 |
0.7 |
26.5 |
– |
20.3 |
– |
32.6 |
50 to 99 lbs |
19.7 |
0.2 |
24.1 |
– |
36.1 |
– |
S |
100 to 499 lbs |
16.1 |
1.1 |
21.6 |
0.2 |
20.6 |
0.3 |
18.6 |
500 to 749 lbs |
20.0 |
0.4 |
35.6 |
– |
24.8 |
0.1 |
12.4 |
750 to 999 lbs |
21.8 |
0.2 |
30.6 |
0.1 |
29.8 |
0.2 |
14.1 |
1,000 to 9,999 lbs |
17.4 |
1.6 |
31.3 |
1.7 |
24.6 |
2.1 |
10.5 |
10,000 to 49,999 lbs |
19.6 |
3.3 |
20.7 |
6.2 |
14.8 |
4.0 |
18.7 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
S |
100,000 lbs or more |
S |
S |
46.7 |
0.1 |
S |
S |
26.7 |
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 |
48.1 |
– |
39.9 |
– |
30.1 |
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 |
S |
S |
S |
S |
S |
S |
31.6 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
30.1 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
28.9 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
31.6 |
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 |
49.1 |
– |
45.5 |
– |
47.4 |
– |
8.2 |
Less than 50 lbs |
S |
S |
27.3 |
12.2 |
29.9 |
14.2 |
9.7 |
50 to 99 lbs |
S |
S |
47.0 |
6.3 |
S |
S |
24.6 |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
17.6 |
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 |
28.6 |
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 |
31.8 |
– |
27.1 |
– |
26.7 |
– |
7.7 |
Less than 50 lbs |
34.7 |
5.8 |
22.5 |
6.8 |
26.8 |
7.5 |
8.3 |
50 to 99 lbs |
39.8 |
2.7 |
27.2 |
3.2 |
28.1 |
3.4 |
14.9 |
100 to 499 lbs |
30.1 |
1.3 |
25.3 |
5.9 |
19.6 |
5.3 |
19.2 |
500 to 749 lbs |
39.7 |
0.9 |
46.5 |
0.3 |
40.7 |
0.8 |
23.9 |
750 to 999 lbs |
48.3 |
0.6 |
48.8 |
0.3 |
S |
S |
S |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
37.5 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
30.0 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
25.8 |
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 |
34.4 |
– |
22.6 |
– |
22.7 |
– |
7.7 |
Less than 50 lbs |
34.7 |
4.1 |
22.5 |
4.4 |
26.8 |
4.2 |
8.3 |
50 to 99 lbs |
39.8 |
2.8 |
27.2 |
2.7 |
28.1 |
2.1 |
14.9 |
100 to 499 lbs |
30.3 |
2.3 |
25.4 |
2.8 |
20.4 |
2.6 |
17.1 |
500 to 749 lbs |
39.7 |
1.2 |
46.5 |
1.1 |
40.7 |
1.7 |
23.9 |
750 to 999 lbs |
48.3 |
0.8 |
48.8 |
3.3 |
S |
S |
S |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
37.5 |
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 |
37.4 |
– |
42.2 |
– |
36.7 |
– |
26.4 |
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 |
– |
– |
– |
– |
– |
– |
– |
1,000 to 9,999 lbs |
– |
– |
– |
– |
– |
– |
– |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
30.0 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
25.8 |
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 |
44.0 |
– |
48.0 |
– |
S |
S |
S |
Less than 50 lbs |
30.4 |
8.2 |
S |
S |
41.2 |
0.6 |
S |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
S |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
25.9 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
28.2 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
30.3 |
1,000 to 9,999 lbs |
44.1 |
9.5 |
31.4 |
10.6 |
S |
S |
S |
10,000 to 49,999 lbs |
43.1 |
10.3 |
S |
S |
S |
S |
S |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
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.