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Table 7b. Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002 and 1997

[Estimates are based on data from the 2002 and 1997 Commodity Flow Surveys. Because of rounding, estimates may not be additive]

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Division 1.1, Explosives with a mass explosion hazard

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 470 1,515 – 69 S S S S S S S 294 S
Single modes 458 1,509 – 69.6 S S S S S S S 319 S
Truck 1 458 1,060 – 56.8 S 326 S S S S S 316 S
For–hire truck 337 703 – 52.1 S 107 S S 65 S 849 605 40.4
Private truck S 357 S S S S S S S 56 152 –
Rail – S S – S S – S S – 1,744 –
Water – – – – – – – – – – – –
Air (includes truck and air) – S S – S S – S S – 177 –
Pipeline 2 – – – – – – S S S S S S
Multiple modes S S S S S S S S S 916 S S
Parcel, U.S.P.S. or courier S S S S S S S S S 916 S S
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S S S S S S 4 67 – 94.6

Division 1.2, Explosives with a projection hazard

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes S S S S 16 S S 15 S 1,045 853 22.5
Single modes S S S S 16 S S 15 S 1,045 838 24.6
Truck 1 S S S S 16 S S 15 S 1,045 837 24.8
For–hire truck S S S S 15 S S 15 S 1,045 873 19.7
Private truck – S S – S S – S S – 9 –
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (includes truck and air) – S S – S S – S S – 1,231 –
Pipeline 2 – – – – – – S S S S S S
Multiple modes – – – – – – – – – – – –
Parcel, U.S.P.S. or courier – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes – S S – S S – S S – 1,239 –

Division 1.3, Explosives with predominantly a fire hazard

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes S 690 S 27 30 – 9.5 21 25 – 15.9 786 448 75.6
Single modes S 631 S 27 23 18.8 21 21 1.4 786 729 7.8
Truck 1 S 629 S S 23 S 19 21 – 9.2 779 704 10.6
For–hire truck S 603 S S 20 S S 20 S 861 949 – 9.3
Private truck S 25 S S S S S S S 239 333 – 28.2
Rail S – S S – S S – S 836 – –
Water – – – – – – – – – – – –
Air (includes truck and air) S S S S S S S S S 2,310 2,364 – 2.3
Pipeline 2 – – – – – – S S S S S S
Multiple modes – S S – S S – S S – S S
Parcel, U.S.P.S. or courier – S S – S S – S S – S S
Other multiple modes – – – – – – – – – – – –
Other and unknown modes – S S – S S – S S – 293 –

Division 1.4, Explosives with no significant blast hazard

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 5,245 2,762 89.9 597 340 75.7 426 235 81.5 834 838 – 0.5
Single modes 5,108 2,256 126.5 587 317 85.0 415 216 91.7 836 604 38.5
Truck 1 5,033 1,806 178.6 586 288 103.6 414 180 130.0 802 478 67.9
For–hire truck 4,594 1,374 234.3 564 212 166.5 406 157 158.3 964 1,031 – 6.6
Private truck S 427 S 22 76 – 71 S 23 S 243 194 25.2
Rail S S S S S S S S S 534 1,663 – 67.9
Water – – – – – – – – – – – –
Air (includes truck and air) S 189 S 1 1 – 53.4 S 1 S 2,001 1,723 16.1
Pipeline 2 – – – – – – S S S S S S
Multiple modes 136 451 – 70 S 18 S S 16 S 835 922 – 9.4
Parcel, U.S.P.S. or courier 136 448 – 69.7 S 18 S S 15 S 835 922 – 9.4
Other multiple modes – S S – S S – S S – 940 –
Other and unknown modes S 55 S S 4 S S S S S 408 S

Division 1.5, Very insensitive explosives, blasting agent

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 944 260 262.4 4,325 620 598.0 1,113 98 S S 102 S
Single modes 940 260 261.9 4,322 616 601.5 1,113 97 S S 102 S
Truck 1 888 260 241.9 3,972 616 544.7 768 97 689.9 139 102 36.4
For–hire truck 144 20 615.1 960 58 S 410 20 S 405 334 21.5
Private truck 742 240 209.7 S 558 S 358 S S 91 92 – 1
Rail 48 – – 350 – – 345 – – 984 – –
Water – – – – – – – – – – – –
Air (includes truck and air) S – S S – S S – S 2,197 – –
Pipeline 2 – – – – – – S S S S S S
Multiple modes S S S S S S S S S 615 518 18.7
Parcel, U.S.P.S. or courier S – S S – S S – S 615 – –
Other multiple modes – S S – S S – S S – 518 –
Other and unknown modes S S S S S S S S S 8 104 – 92.6

Division 2.1, Flammable gases

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 39,955 28,773 38.9 122,465 80,861 51.5 22,064 11,124 98.4 96 54 77.3
Single modes 39,626 27,494 44.1 121,749 79,181 53.8 21,795 10,908 99.8 95 51 86.1
Truck 1 16,998 11,599 46.5 44,031 26,838 64.1 5,295 2,616 102.4 81 44 84.1
For–hire truck 6,241 3,946 58.2 18,571 13,013 42.7 3,651 1,741 109.7 461 364 26.7
Private truck 10,757 7,531 42.8 25,460 13,544 88.0 1,643 855 92.2 27 22 23.1
Rail 7,579 2,961 156.0 22,755 8,608 164.3 13,061 5,401 141.8 659 604 9.2
Water 1,528 1,084 41.0 6,206 4,205 47.6 1,248 1,086 14.9 226 317 – 28.7
Air (includes truck and air) S S S S S S S S S 1,549 2,816 – 45
Pipeline 2 13,463 11,850 13.6 48,740 39,530 23.3 S S S S S S
Multiple modes 122 219 – 44.1 530 479 10.7 262 100 161.7 805 S S
Parcel, U.S.P.S. or courier S 23 S S 2 S S 1 S 715 602 18.8
Other multiple modes 76 196 – 61.1 529 478 10.6 260 99 162.9 S 142 S
Other and unknown modes S 1,061 S 186 1,201 – 84.5 8 S S S S S

Division 2.2, Nonflammable, nontoxic compressed gases

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 27,024 12,597 114.5 66,329 34,109 94.5 9,012 5,451 65.3 92 61 51.0
Single modes 26,260 11,959 119.6 66,118 32,849 101.3 8,918 5,306 68.1 83 50 64.4
Truck 1 25,111 10,606 136.8 40,261 28,207 42.7 6,540 3,359 94.7 81 47 72.1
For–hire truck 13,254 4,467 196.7 4,598 2,924 57.3 2,137 850 151.5 630 457 37.8
Private truck 11,847 6,111 93.9 35,479 25,218 40.7 4,219 2,465 71.2 42 30 41.5
Rail 218 253 – 13.9 385 453 – 15.1 S 283 S 857 682 25.5
Water S S S S S S S S S 100 1,401 – 92.8
Air (includes truck and air) 186 475 – 60.8 S 4 S S 3 S 1,298 1,221 6.3
Pipeline 2 S 437 S S 4,075 S S S S S S S
Multiple modes 547 270 102.5 65 S S S 23 S 629 406 54.9
Parcel, U.S.P.S. or courier 467 246 90.1 S S S 6 S S 624 406 53.6
Other multiple modes 80 24 227.3 S S S S S S 1,053 S S
Other and unknown modes 217 368 – 41 147 S S S S S S S S

Division 2.3, Gases toxic by inhalation

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 6,953 5,918 17.5 24,564 22,168 10.8 6,186 9,426 – 34.4 117 91 28.8
Single modes 6,850 5,698 20.2 24,239 20,622 17.5 6,155 9,354 – 34.2 117 125 – 6.3
Truck 1 4,911 2,384 106.0 12,574 7,473 68.3 1,702 1,324 28.5 105 72 45.2
For–hire truck 2,366 1,244 90.2 6,190 4,287 44.4 998 S S 212 184 15.0
Private truck 2,542 1,122 126.6 6,368 3,111 104.7 S 271 S 60 46 30.0
Rail 1,169 2,765 – 57.7 6,090 8,868 – 31.3 3,226 6,736 – 52.1 549 764 – 28.1
Water S 224 S S 2,161 S S 869 S 460 1,024 – 55
Air (includes truck and air) S S S S S S S S S 610 1,103 – 44.7
Pipeline 2 624 322 93.5 4,685 2,120 121.0 S S S S S S
Multiple modes S S S S S S S S S 316 788 – 59.9
Parcel, U.S.P.S. or courier S S S S – S – S S 318 790 – 59.8
Other multiple modes S S S S S S S S S 1 477 – 99.7
Other and unknown modes 86 212 – 59.5 S S S 31 S S S S S

Division 4.1, Flammable solids

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 3,229 2,001 61.4 9,214 10,137 – 9.1 3,123 8,446 – 63 256 880 – 70.9
Single modes 2,787 1,864 49.5 9,185 10,037 – 8.5 3,108 8,338 – 62.7 S 775 S
Truck 1 2,369 1,575 50.4 5,051 3,718 35.8 513 488 5.3 S 682 S
For–hire truck 321 971 – 67 3,442 2,917 18.0 398 415 – 4.2 283 417 – 32.1
Private truck 2,048 593 245.1 1,609 599 168.7 115 67 72.4 S 943 S
Rail S 232 S 2,795 5,904 – 52.7 2,118 7,815 – 72.9 859 1,391 – 38.2
Water 16 S S 1,263 S S S S S 269 108 148.4
Air (includes truck and air) S S S S S S S S S 1,974 1,408 40.2
Pipeline 2 S S S S 390 S S S S S S S
Multiple modes S S S S S S S S S 1,023 1,010 1.3
Parcel, U.S.P.S. or courier 41 S S 1 6 – 86.8 1 5 – 85.4 883 1,007 – 12.4
Other multiple modes S S S S S S S S S 4,858 1,657 193.2
Other and unknown modes S S S S S S S S S S 426 S

Division 4.2, Spontaneously combustible materials

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 1,849 1,098 68.4 927 956 – 3 526 785 – 32.9 108 165 – 34.5
Single modes 1,750 1,086 61.2 917 949 – 3.5 512 780 – 34.3 84 172 – 51.3
Truck 1 1,552 597 160.1 616 560 10.1 S 167 S 82 137 – 39.7
For–hire truck S 401 S 551 385 42.9 S 133 S 191 335 – 42.9
Private truck 474 196 142.4 65 174 – 63 S 35 S 41 62 – 34
Rail 195 489 – 60.2 S 390 S 250 613 – 59.1 819 1,559 – 47.5
Water – – – – – – – – – – – –
Air (includes truck and air) S S S S – S S – S 2,002 1,167 71.5
Pipeline 2 – – – – – – S S S S S S
Multiple modes 97 S S 6 S S S S S 254 303 – 16.2
Parcel, U.S.P.S. or courier 96 S S 6 S S S S S 254 264 – 3.8
Other multiple modes S S S S S S S S S 1,913 1,806 6.0
Other and unknown modes S S S S S S S S S S 7 S

Division 4.3, Dangerous when wet materials

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes S 1,140 S 1,159 S S S 505 S 369 477 – 22.6
Single modes S 1,068 S 1,105 S S S 493 S 315 295 7.0
Truck 1 S 930 S 1,044 S S S 282 S 310 284 9.2
For–hire truck S 667 S S 525 S S 195 S 615 508 21.1
Private truck 168 261 – 35.8 410 S S S S S 79 241 – 67
Rail S 135 S S 184 S S 211 S 1,507 940 60.4
Water – S S – S S – S S – 228 –
Air (includes truck and air) S S S S S S S S S 2,498 1,351 84.9
Pipeline 2 – – – – – – S S S S S S
Multiple modes 56 S S S S S S S S 604 1,825 – 66.9
Parcel, U.S.P.S. or courier S S S S S S S S S 592 1,829 – 67.7
Other multiple modes S S S S S S S S S 1,081 1,433 – 24.6
Other and unknown modes S S S S S S S S S S 40 S

Division 5.1, Oxidizers

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 4,610 4,153 11.0 11,773 9,148 28.7 3,807 4,412 – 13.7 398 185 114.9
Single modes 4,475 4,039 10.8 11,403 8,935 27.6 3,598 4,332 – 16.9 353 169 108.7
Truck 1 3,737 2,922 27.9 8,976 5,750 56.1 2,303 1,511 52.4 343 154 122.6
For–hire truck 1,664 1,774 – 6.2 5,897 2,897 103.5 S 1,126 S 539 487 10.8
Private truck 2,066 1,138 81.5 3,023 2,845 6.3 278 384 – 27.7 68 55 22.4
Rail 736 1,115 – 34 2,427 3,182 – 23.7 1,295 2,820 – 54.1 623 870 – 28.4
Water – S S – S S – S S – S S
Air (includes truck and air) S S S – – S S S S 1,071 814 31.5
Pipeline 2 – – – – – – S S S S S S
Multiple modes 84 35 138.9 S S S S S S 1,173 439 167.2
Parcel, U.S.P.S. or courier S S S S S S S – S 1,216 427 184.6
Other multiple modes 74 S S S S S S S S S 2,359 S
Other and unknown modes S 79 S S S S S S S S 75 S

Division 5.2, Organic peroxides

Hazard Class Division and Mode of Transportation Value Tons Ton–miles Average miles per shipment
2002
(million $)		 1997
(million $)		 Percent
change		 2002
(thousands)		 1997
(thousands)		 Percent
change		 2002
(millions)		 1997
(millions)		 Percent
change		 2002 1997 Percent
change
All modes 861 332 159.1 S 92 S S 60 S 511 324 58.0
Single modes 857 324 164.4 S 89 S S 57 S 484 329 47.1
Truck 1 S 324 S S 89 S S 57 S 480 287 67.2
For–hire truck S 195 S S 57 S S 37 S 574 531 8.2
Private truck S 116 S 14 26 – 48.1 2 S S 77 160 – 51.6
Rail S – S S – S S – S 2,245 – –
Water – – – – – – – – – – – –
Air (includes truck and air) S S S S S S S S S 823 2,424 – 66.1
Pipeline 2 – – – – – – S S S S S S
Multiple modes S S S S S S S S S 633 353 79.3
Parcel, U.S.P.S. or courier S S S S S S S S S 633 344 83.9
Other multiple modes – S S – S S – S S – 1,718 –
Other and unknown modes S S S S S S S S S 1,208 37 S

KEY:
– Represents and 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.

1 "Truck" as a single mode includes shipments that were made by only private truck, only for–hire truck, or a combination of private and for–hire truck.

2 Estimates for pipeline exclude shipments of crude petroleum.

SOURCE:
Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.
Research and Innovative Technology Administration (RITA) • U.S. Department of Transportation (US DOT)
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