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 |
5.9 |
– |
20.5 |
– |
19.3 |
– |
15.5 |
Less than 50 lbs |
21.7 |
2.0 |
19.1 |
0.1 |
28.8 |
0.3 |
15.6 |
50 to 99 lbs |
15.2 |
0.5 |
25.8 |
– |
44.9 |
0.2 |
22.4 |
100 to 499 lbs |
16.1 |
1.3 |
14.4 |
0.3 |
9.9 |
0.4 |
13.2 |
500 to 749 lbs |
12.3 |
0.2 |
13.7 |
0.1 |
17.9 |
0.1 |
21.2 |
750 to 999 lbs |
S |
S |
26.2 |
0.1 |
23.7 |
0.1 |
24.9 |
1,000 to 9,999 lbs |
10.5 |
1.9 |
9.0 |
1.6 |
14.0 |
2.2 |
13.8 |
10,000 to 49,999 lbs |
8.2 |
2.8 |
19.8 |
4.4 |
12.3 |
5.8 |
21.2 |
50,000 to 99,999 lbs |
17.5 |
0.7 |
42.4 |
4.2 |
40.1 |
2.4 |
S |
100,000 lbs or more |
31.7 |
0.8 |
29.4 |
3.1 |
45.2 |
5.3 |
27.8 |
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 |
6.3 |
– |
21.1 |
– |
18.3 |
– |
14.7 |
Less than 50 lbs |
23.0 |
0.7 |
26.1 |
– |
16.8 |
– |
33.1 |
50 to 99 lbs |
20.9 |
0.2 |
24.3 |
– |
23.6 |
– |
18.0 |
100 to 499 lbs |
20.9 |
1.6 |
18.1 |
0.3 |
11.2 |
0.2 |
15.7 |
500 to 749 lbs |
13.8 |
0.4 |
14.3 |
0.1 |
19.0 |
0.1 |
18.6 |
750 to 999 lbs |
23.8 |
0.3 |
27.1 |
0.1 |
27.2 |
0.1 |
27.0 |
1,000 to 9,999 lbs |
10.4 |
2.0 |
9.2 |
1.6 |
14.6 |
2.3 |
13.8 |
10,000 to 49,999 lbs |
9.2 |
3.1 |
20.4 |
4.5 |
11.1 |
6.2 |
19.2 |
50,000 to 99,999 lbs |
17.6 |
0.8 |
42.7 |
4.3 |
40.2 |
2.6 |
S |
100,000 lbs or more |
31.7 |
0.9 |
28.9 |
3.0 |
42.9 |
5.5 |
26.6 |
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 |
5.8 |
– |
22.6 |
– |
17.8 |
– |
11.9 |
Less than 50 lbs |
23.8 |
0.7 |
26.6 |
– |
20.1 |
– |
15.7 |
50 to 99 lbs |
21.0 |
0.2 |
24.4 |
– |
24.5 |
– |
16.0 |
100 to 499 lbs |
23.3 |
1.6 |
18.3 |
0.3 |
12.6 |
0.2 |
9.3 |
500 to 749 lbs |
13.7 |
0.4 |
14.3 |
0.1 |
19.1 |
0.1 |
18.6 |
750 to 999 lbs |
23.9 |
0.4 |
27.1 |
0.2 |
27.2 |
0.2 |
27.0 |
1,000 to 9,999 lbs |
10.4 |
2.2 |
9.2 |
1.9 |
14.6 |
2.9 |
13.8 |
10,000 to 49,999 lbs |
9.2 |
3.0 |
20.4 |
4.0 |
11.2 |
4.9 |
19.2 |
50,000 to 99,999 lbs |
22.5 |
0.9 |
44.3 |
4.6 |
45.4 |
2.7 |
S |
100,000 lbs or more |
S |
S |
42.1 |
1.5 |
S |
S |
34.8 |
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 |
26.3 |
– |
23.2 |
– |
29.8 |
– |
21.7 |
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 |
30.3 |
10,000 to 49,999 lbs |
29.4 |
11.6 |
31.9 |
6.1 |
34.8 |
6.5 |
23.2 |
50,000 to 99,999 lbs |
41.4 |
11.1 |
40.9 |
5.9 |
42.2 |
4.1 |
24.0 |
100,000 lbs or more |
45.6 |
11.5 |
24.4 |
6.4 |
32.2 |
5.8 |
17.4 |
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 |
46.8 |
– |
S |
S |
49.3 |
– |
9.3 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
6.9 |
50 to 99 lbs |
48.1 |
1.6 |
S |
S |
S |
S |
17.5 |
100 to 499 lbs |
S |
S |
42.0 |
14.7 |
S |
S |
20.3 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
31.2 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
31.2 |
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 |
31.6 |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
26.0 |
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 |
15.7 |
– |
40.8 |
– |
S |
S |
10.4 |
Less than 50 lbs |
25.7 |
8.9 |
24.2 |
9.4 |
30.2 |
10.2 |
10.6 |
50 to 99 lbs |
25.3 |
3.4 |
36.1 |
4.9 |
S |
S |
16.3 |
100 to 499 lbs |
31.9 |
5.0 |
29.4 |
6.1 |
32.8 |
7.3 |
14.9 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
28.7 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
42.8 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
29.0 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
16.7 |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
31.6 |
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 |
17.0 |
– |
17.6 |
– |
21.7 |
– |
10.4 |
Less than 50 lbs |
25.7 |
9.4 |
24.2 |
8.3 |
30.2 |
9.0 |
10.6 |
50 to 99 lbs |
25.3 |
3.4 |
36.1 |
4.0 |
S |
S |
16.3 |
100 to 499 lbs |
32.0 |
5.3 |
29.5 |
5.4 |
33.3 |
7.1 |
13.6 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
28.7 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
28.1 |
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 |
23.0 |
Less than 50 lbs |
– |
– |
– |
– |
– |
– |
– |
50 to 99 lbs |
– |
– |
– |
– |
– |
– |
– |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
500 to 749 lbs |
– |
– |
– |
– |
– |
– |
– |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
29.0 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
16.7 |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
31.6 |
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 |
29.1 |
– |
17.5 |
– |
34.7 |
– |
S |
Less than 50 lbs |
37.9 |
7.4 |
34.6 |
0.2 |
48.5 |
0.5 |
S |
50 to 99 lbs |
S |
S |
42.4 |
0.9 |
49.3 |
0.1 |
S |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
S |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
32.1 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
29.0 |
1,000 to 9,999 lbs |
36.8 |
4.7 |
40.7 |
5.3 |
43.9 |
10.6 |
34.6 |
10,000 to 49,999 lbs |
41.5 |
13.0 |
26.9 |
11.3 |
38.2 |
13.9 |
26.4 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
30.8 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
37.0 |
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.