Table B-6b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class and Mode of Transportation: 2002 and 1997
Monday, July 2, 2012
Table B-6b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class and Mode of Transportation: 2002 and 1997
[Estimates are shown as percents and are based on data from the
2002 and 1997 Commodity Flow Surveys]
Excel | CSV
Class 1,
Explosives
All modes |
23.8 |
7.3 |
35.3 |
43.2 |
21.7 |
140.7 |
29.5 |
S |
S |
10.9 |
8.4 |
11.6 |
Single modes |
24.5 |
7.9 |
39.7 |
43.2 |
22.2 |
143.9 |
29.5 |
S |
S |
20.6 |
13.5 |
26.1 |
Truck |
24.6 |
6.8 |
47.1 |
44.1 |
18.9 |
175.1 |
27.8 |
26.4 |
93.1 |
23.4 |
13.5 |
32.0 |
For-hire
truck |
27.0 |
10.3 |
58.4 |
33.9 |
19.7 |
147.9 |
27.9 |
14.4 |
94.8 |
8.6 |
6.7 |
10.6 |
Private truck |
34.9 |
13.1 |
49.7 |
S |
26.0 |
S |
44.1 |
S |
S |
15.6 |
12.7 |
14.1 |
Rail |
48.8 |
48.1 |
9.5 |
41.3 |
S |
S |
44.3 |
S |
S |
19.9 |
20.2 |
15.6 |
Water |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
Air (includes truck and
air) |
S |
32.5 |
S |
44.4 |
27.4 |
34.4 |
46.1 |
26.8 |
102.4 |
15.5 |
10.1 |
22.3 |
Pipeline |
– |
– |
– |
– |
– |
– |
S |
S |
S |
S |
S |
S |
Multiple modes |
38.3 |
17.0 |
12.5 |
S |
13.3 |
S |
S |
16.3 |
S |
10.7 |
8.8 |
12.8 |
Parcel, U.S.P.S. or
courier |
38.3 |
17.1 |
12.6 |
S |
14.3 |
S |
S |
16.4 |
S |
10.7 |
8.8 |
12.8 |
Other multiple modes |
– |
S |
S |
– |
S |
S |
– |
S |
S |
– |
30.1 |
– |
Other and unknown modes |
S |
S |
S |
S |
S |
S |
S |
S |
S |
32.2 |
33.2 |
1.1 |
Class 2, Gases
All modes |
7.9 |
6.1 |
15.7 |
15.6 |
5.0 |
25.5 |
8.9 |
13.8 |
23.5 |
29.0 |
12.8 |
50.4 |
Single modes |
8.1 |
5.4 |
15.6 |
15.7 |
4.3 |
26.0 |
8.8 |
14.1 |
24.0 |
27.1 |
14.6 |
51.9 |
Truck |
9.6 |
8.6 |
24.6 |
17.4 |
7.0 |
29.0 |
15.5 |
10.5 |
34.8 |
28.3 |
12.6 |
54.7 |
For-hire
truck |
13.4 |
6.4 |
33.6 |
20.1 |
15.8 |
37.1 |
25.2 |
18.0 |
57.9 |
17.9 |
12.1 |
26.7 |
Private truck |
12.4 |
15.4 |
33.8 |
23.3 |
8.6 |
39.9 |
27.9 |
12.4 |
55.8 |
25.9 |
5.2 |
36.9 |
Rail |
16.4 |
15.2 |
33.5 |
15.5 |
10.2 |
30.2 |
12.7 |
18.3 |
29.8 |
7.2 |
11.2 |
12.5 |
Water |
38.0 |
15.5 |
47.1 |
32.4 |
21.4 |
42.8 |
31.2 |
39.1 |
43.5 |
31.2 |
21.5 |
12.8 |
Air (includes truck and
air) |
34.4 |
25.3 |
21.8 |
S |
32.7 |
S |
S |
48.4 |
S |
16.7 |
12.1 |
20.7 |
Pipeline |
23.8 |
9.0 |
29.8 |
35.3 |
5.8 |
61.8 |
S |
S |
S |
S |
S |
S |
Multiple modes |
28.1 |
22.0 |
49.4 |
34.9 |
30.7 |
59.9 |
44.8 |
35.0 |
154.5 |
25.5 |
23.9 |
62.1 |
Parcel, U.S.P.S. or
courier |
37.5 |
19.3 |
80.2 |
S |
S |
S |
30.5 |
S |
S |
27.6 |
18.3 |
48.3 |
Other multiple modes |
32.2 |
34.6 |
34.6 |
36.8 |
32.3 |
67.2 |
45.6 |
35.5 |
171.8 |
S |
S |
S |
Other and unknown modes |
40.0 |
32.4 |
16.0 |
23.8 |
S |
S |
30.8 |
46.6 |
10.3 |
S |
S |
S |
Class 3, Flammable
liquids
All modes |
3.7 |
3.4 |
6.4 |
4.3 |
3.0 |
6.5 |
5.2 |
9.4 |
12.7 |
12.2 |
6.3 |
21.3 |
Single modes |
3.7 |
3.4 |
6.4 |
4.2 |
3.0 |
6.4 |
6.3 |
8.5 |
13.2 |
9.4 |
5.7 |
13.3 |
Truck |
4.3 |
4.3 |
7.6 |
5.1 |
4.5 |
8.2 |
8.4 |
7.3 |
14.8 |
7.0 |
5.7 |
10.2 |
For-hire
truck |
8.0 |
6.7 |
13.6 |
8.0 |
8.7 |
14.5 |
16.8 |
9.4 |
26.3 |
9.0 |
9.4 |
14.1 |
Private truck |
4.6 |
3.4 |
6.9 |
5.0 |
2.9 |
6.9 |
9.5 |
10.1 |
18.2 |
10.1 |
5.2 |
12.4 |
Rail |
10.8 |
9.1 |
15.4 |
8.5 |
11.6 |
18.2 |
13.7 |
11.0 |
20.1 |
7.9 |
5.6 |
8.0 |
Water |
13.8 |
12.7 |
28.9 |
15.6 |
13.1 |
29.5 |
12.3 |
16.6 |
26.0 |
S |
S |
S |
Air (includes truck and
air) |
30.8 |
S |
S |
S |
33.8 |
S |
S |
39.9 |
S |
11.2 |
8.4 |
26.0 |
Pipeline |
7.3 |
6.2 |
12.9 |
7.4 |
6.8 |
12.2 |
S |
S |
S |
S |
S |
S |
Multiple modes |
20.9 |
18.8 |
44.4 |
30.0 |
29.8 |
63.1 |
22.0 |
S |
S |
15.4 |
11.1 |
35.2 |
Parcel, U.S.P.S. or
courier |
32.3 |
19.7 |
117.9 |
34.1 |
30.1 |
95.1 |
26.5 |
24.6 |
82.2 |
15.5 |
7.8 |
27.6 |
Other multiple modes |
24.6 |
20.7 |
41.5 |
30.2 |
29.9 |
63.3 |
22.1 |
S |
S |
26.6 |
S |
S |
Other and unknown modes |
19.4 |
16.0 |
22.5 |
22.6 |
12.1 |
26.4 |
S |
18.6 |
S |
43.4 |
16.2 |
92.8 |
Class 4, Flammable solids
All modes |
22.1 |
8.1 |
36.5 |
8.8 |
22.8 |
18.7 |
14.0 |
35.1 |
17.1 |
46.3 |
15.0 |
11.7 |
Single modes |
24.4 |
7.4 |
37.9 |
8.9 |
23.2 |
19.0 |
14.4 |
35.7 |
17.4 |
32.2 |
13.2 |
7.7 |
Truck |
27.5 |
9.4 |
48.2 |
11.7 |
36.9 |
33.3 |
40.8 |
10.9 |
62.6 |
24.8 |
16.1 |
6.9 |
For-hire
truck |
40.1 |
9.9 |
49.6 |
19.5 |
7.4 |
25.3 |
48.6 |
15.1 |
81.7 |
20.5 |
9.1 |
13.3 |
Private truck |
36.1 |
21.1 |
107.1 |
15.8 |
S |
S |
25.5 |
35.0 |
44.5 |
28.6 |
27.1 |
3.9 |
Rail |
39.2 |
14.1 |
30.3 |
21.4 |
37.0 |
20.8 |
13.2 |
39.7 |
12.0 |
14.4 |
10.0 |
11.0 |
Water |
44.1 |
S |
S |
49.9 |
S |
S |
S |
S |
S |
30.1 |
29.5 |
50.0 |
Air (includes truck and
air) |
S |
45.8 |
S |
S |
S |
S |
S |
S |
S |
19.9 |
19.8 |
42.2 |
Pipeline |
S |
S |
S |
S |
46.4 |
S |
S |
S |
S |
S |
S |
S |
Multiple modes |
S |
48.3 |
S |
S |
S |
S |
S |
S |
S |
S |
16.2 |
S |
Parcel, U.S.P.S. or
courier |
32.5 |
S |
S |
29.0 |
43.4 |
62.4 |
S |
47.7 |
S |
23.6 |
16.9 |
11.0 |
Other multiple modes |
S |
S |
S |
S |
S |
S |
S |
S |
S |
26.6 |
26.1 |
90.5 |
Other and unknown modes |
S |
37.5 |
S |
S |
S |
S |
S |
46.2 |
S |
S |
S |
S |
Class 5, Oxidizers and
organic peroxides
All modes |
21.8 |
13.7 |
31.4 |
26.8 |
12.1 |
40.3 |
25.3 |
18.7 |
29.7 |
18.7 |
13.9 |
49.2 |
Single modes |
22.4 |
13.9 |
32.3 |
26.6 |
12.1 |
39.7 |
25.6 |
18.8 |
29.0 |
14.3 |
14.5 |
41.6 |
Truck |
26.4 |
14.7 |
42.7 |
33.5 |
14.1 |
61.4 |
39.1 |
18.7 |
74.8 |
15.9 |
15.1 |
48.1 |
For-hire
truck |
19.7 |
16.7 |
31.2 |
37.6 |
20.5 |
98.3 |
44.0 |
22.1 |
102.2 |
13.0 |
7.7 |
16.7 |
Private truck |
37.3 |
13.7 |
69.6 |
32.1 |
12.6 |
36.4 |
21.4 |
15.5 |
18.7 |
17.3 |
18.1 |
28.3 |
Rail |
40.6 |
40.2 |
38.1 |
24.2 |
21.2 |
24.5 |
22.0 |
26.1 |
15.7 |
16.3 |
11.4 |
14.4 |
Water |
– |
S |
S |
– |
S |
S |
– |
S |
S |
– |
S |
S |
Air (includes truck and
air) |
S |
46.3 |
S |
49.6 |
S |
S |
S |
S |
S |
26.6 |
23.9 |
19.0 |
Pipeline |
– |
– |
– |
– |
– |
– |
S |
S |
S |
S |
S |
S |
Multiple modes |
41.4 |
35.6 |
121.5 |
S |
S |
S |
S |
S |
S |
18.2 |
12.1 |
57.3 |
Parcel, U.S.P.S. or
courier |
S |
S |
S |
S |
47.7 |
S |
S |
34.4 |
S |
23.0 |
9.2 |
69.1 |
Other multiple modes |
49.3 |
43.8 |
257.1 |
S |
S |
S |
S |
S |
S |
S |
23.1 |
S |
Other and unknown modes |
S |
36.4 |
S |
S |
S |
S |
S |
S |
S |
S |
42.0 |
S |
Class 6, Toxic (poison)
All modes |
11.6 |
8.8 |
11.9 |
15.9 |
16.4 |
30.3 |
22.2 |
10.9 |
37.2 |
21.3 |
13.4 |
39.0 |
Single modes |
12.5 |
8.7 |
12.5 |
16.9 |
16.8 |
31.5 |
22.9 |
10.8 |
38.5 |
25.4 |
13.0 |
44.4 |
Truck |
13.5 |
9.3 |
11.0 |
15.1 |
13.4 |
16.0 |
13.7 |
9.8 |
14.7 |
14.0 |
16.2 |
23.1 |
For-hire
truck |
18.8 |
10.5 |
18.0 |
14.1 |
11.3 |
17.0 |
14.0 |
10.6 |
16.4 |
14.5 |
7.8 |
17.2 |
Private truck |
21.0 |
20.8 |
12.7 |
29.0 |
33.3 |
24.4 |
30.2 |
28.9 |
23.7 |
15.5 |
29.4 |
10.3 |
Rail |
14.0 |
9.6 |
13.2 |
14.0 |
12.8 |
18.5 |
15.8 |
8.2 |
21.1 |
6.0 |
12.2 |
16.8 |
Water |
42.0 |
S |
S |
43.5 |
S |
S |
S |
S |
S |
23.8 |
24.6 |
81.6 |
Air (includes truck and
air) |
S |
35.3 |
S |
S |
S |
S |
S |
S |
S |
25.1 |
9.4 |
33.3 |
Pipeline |
S |
30.0 |
S |
47.5 |
37.8 |
284.4 |
S |
S |
S |
S |
S |
S |
Multiple modes |
S |
27.8 |
S |
S |
39.0 |
S |
S |
S |
S |
16.9 |
22.0 |
43.8 |
Parcel, U.S.P.S. or
courier |
48.7 |
30.6 |
16.4 |
S |
21.7 |
S |
S |
21.6 |
S |
19.3 |
22.4 |
46.9 |
Other multiple modes |
S |
35.9 |
S |
S |
40.2 |
S |
S |
S |
S |
25.2 |
24.9 |
30.9 |
Other and unknown modes |
S |
30.6 |
S |
S |
31.5 |
S |
45.0 |
30.6 |
113.3 |
S |
23.7 |
S |
Class 7, Radioactive
materials
All modes |
39.0 |
20.9 |
95.2 |
31.2 |
24.0 |
25.6 |
31.7 |
26.7 |
37.7 |
S |
27.7 |
S |
Single modes |
41.9 |
21.7 |
117.8 |
32.5 |
23.3 |
31.3 |
34.4 |
21.5 |
47.7 |
S |
26.7 |
S |
Truck |
42.2 |
27.5 |
185.7 |
32.8 |
23.7 |
37.2 |
35.3 |
11.2 |
78.9 |
S |
43.1 |
S |
For-hire
truck |
47.4 |
19.3 |
286.9 |
34.4 |
23.0 |
28.4 |
30.4 |
15.2 |
58.2 |
S |
49.1 |
S |
Private truck |
43.6 |
42.3 |
146.0 |
44.0 |
34.1 |
68.5 |
S |
S |
S |
S |
15.2 |
S |
Rail |
– |
S |
S |
– |
S |
S |
– |
S |
S |
– |
31.6 |
– |
Water |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
Air (includes truck and
air) |
42.2 |
28.5 |
4.7 |
41.4 |
33.6 |
5.1 |
43.5 |
34.6 |
7.5 |
23.7 |
9.4 |
33.2 |
Pipeline |
– |
S |
S |
– |
S |
S |
S |
S |
S |
S |
S |
S |
Multiple modes |
45.5 |
37.5 |
73.7 |
42.5 |
43.5 |
22.2 |
42.0 |
48.9 |
22.6 |
23.6 |
20.8 |
34.3 |
Parcel, U.S.P.S. or
courier |
45.5 |
37.5 |
73.7 |
42.5 |
43.5 |
22.2 |
42.0 |
48.9 |
22.6 |
23.6 |
20.8 |
34.3 |
Other multiple modes |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
– |
Other and unknown modes |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
Class 8, Corrosive
materials
All modes |
6.9 |
20.3 |
19.9 |
9.7 |
8.1 |
11.7 |
10.1 |
17.2 |
16.9 |
14.9 |
18.6 |
34.9 |
Single modes |
6.7 |
20.0 |
19.9 |
9.6 |
7.9 |
11.6 |
9.7 |
17.3 |
16.6 |
14.9 |
20.0 |
36.5 |
Truck |
7.0 |
19.3 |
23.2 |
10.4 |
12.9 |
17.2 |
13.2 |
31.6 |
43.6 |
11.9 |
17.7 |
28.9 |
For-hire
truck |
11.1 |
28.7 |
30.6 |
12.8 |
18.6 |
25.1 |
15.7 |
38.3 |
52.4 |
8.4 |
7.0 |
12.4 |
Private truck |
8.3 |
6.0 |
15.1 |
12.4 |
15.8 |
18.3 |
21.3 |
17.7 |
36.2 |
9.9 |
28.1 |
35.4 |
Rail |
11.9 |
36.9 |
20.5 |
14.4 |
13.3 |
18.3 |
15.1 |
21.7 |
23.0 |
5.1 |
12.5 |
9.6 |
Water |
32.0 |
35.3 |
11.9 |
18.9 |
26.3 |
17.0 |
31.2 |
37.1 |
13.9 |
25.6 |
45.7 |
28.4 |
Air (includes truck and
air) |
33.1 |
24.9 |
44.0 |
S |
27.3 |
S |
S |
31.8 |
S |
15.7 |
9.4 |
24.0 |
Pipeline |
44.5 |
S |
S |
45.2 |
29.6 |
122.8 |
S |
S |
S |
S |
S |
S |
Multiple modes |
19.1 |
19.9 |
28.0 |
31.1 |
32.3 |
74.6 |
38.4 |
37.9 |
91.1 |
22.7 |
17.5 |
35.1 |
Parcel, U.S.P.S. or
courier |
23.8 |
22.3 |
33.5 |
S |
26.2 |
S |
S |
23.1 |
S |
22.4 |
18.0 |
35.5 |
Other multiple modes |
31.6 |
32.1 |
44.4 |
32.6 |
35.1 |
80.7 |
39.4 |
38.7 |
93.0 |
S |
32.4 |
S |
Other and unknown modes |
S |
49.2 |
S |
36.8 |
41.4 |
16.5 |
42.7 |
S |
S |
37.5 |
29.0 |
142.9 |
Class 9, Miscellaneous
dangerous goods
All modes |
13.4 |
7.6 |
15.2 |
20.6 |
14.1 |
23.3 |
11.8 |
12.7 |
15.4 |
9.3 |
8.8 |
14.6 |
Single modes |
14.3 |
8.5 |
16.5 |
21.0 |
14.4 |
23.6 |
12.2 |
13.1 |
15.7 |
11.4 |
10.1 |
17.6 |
Truck |
18.1 |
7.3 |
20.9 |
26.7 |
12.6 |
27.7 |
22.0 |
10.5 |
21.7 |
13.0 |
15.2 |
23.9 |
For-hire
truck |
17.4 |
9.3 |
18.7 |
25.0 |
15.3 |
25.2 |
16.1 |
13.9 |
14.9 |
21.0 |
7.6 |
20.5 |
Private truck |
44.1 |
19.7 |
73.9 |
35.7 |
20.2 |
48.4 |
45.7 |
21.2 |
83.9 |
20.3 |
13.2 |
43.5 |
Rail |
14.3 |
19.9 |
14.3 |
19.7 |
24.2 |
20.9 |
15.3 |
18.9 |
17.3 |
4.5 |
8.7 |
11.8 |
Water |
26.4 |
S |
S |
30.4 |
S |
S |
38.8 |
S |
S |
26.8 |
28.2 |
46.1 |
Air (includes truck and
air) |
39.3 |
33.5 |
106.9 |
S |
40.1 |
S |
S |
41.9 |
S |
11.2 |
6.3 |
21.7 |
Pipeline |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
S |
Multiple modes |
19.7 |
25.6 |
33.2 |
S |
22.0 |
S |
38.1 |
19.9 |
72.2 |
33.5 |
16.9 |
40.4 |
Parcel, U.S.P.S. or
courier |
21.6 |
36.2 |
49.4 |
24.2 |
28.9 |
25.7 |
20.1 |
31.9 |
51.5 |
39.1 |
18.0 |
45.9 |
Other multiple modes |
32.4 |
28.9 |
36.9 |
S |
22.0 |
S |
38.3 |
19.9 |
72.5 |
23.9 |
12.4 |
20.0 |
Other and unknown modes |
46.2 |
S |
S |
S |
S |
S |
S |
S |
S |
22.5 |
37.4 |
216.6 |
KEY:
– Represents an estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of highly sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give
information on 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, Hazmat
Data, December 2004.