Table 7a. Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2007

Table 7a. Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2007

Estimates are based on data from the 2007 Commodity Flow Survey. Because of rounding, estimates may not be additive.

Division 1.1, Explosives with a mass explosion hazard

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Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes S S S S S S 398 S S S S S S 22.8
Single modes S S S S S S 350 S S S S S S 21.2
Truck 3 S S S S S S 310 S S S S S S 23
For-hire truck S S S S S S 670 S S S S S S 27
Private Truck S S S S S S 137 S S S S S S 35.2
Rail S S S S S S S S S S S S S S
Water S S S S S S S S S S S S S S
Deep draft S S S S S S S S S S S S S S
Air (includes truck and air) S S S S S S S S S S S S S S
Multiple modes S S S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S S S
Other and unknown modes S S - 0.2 - - 22 S S 45.2 5.6 48.8 0.7 0.6

Division 1.2, Explosives with a projection hazard

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes S S S S S S S S S S S S S S
Single modes S S S S S S S 37.9 - 45.2 - 25.8 - 29.7
Truck 3 S S S S S S S S S S S S S S
For-hire truck S S S S S S S 37.9 - 45.2 - 25.8 - 29.9
Private Truck S S S S S S 30 S S S S S S S

Division 1.3, Explosives with predominantly a fire hazard

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 818 100 47 100 27 100 628 37.9 - 45.2 - 25.8 - 29.9
Single modes 818 100.0 47 100.0 27 100.0 625 S S S S S S S
Truck 3 818 100.0 47 100.0 27 100.0 625 19 17.9 S S 26.8 15.2 11.2
For-hire truck 372 45.5 S S 23 83.6 1,208 S S S S S S 49.5
Private Truck S S S S S S 136 S S S S S S 25.8
Multiple modes S S S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S S S

Division 1.4, Explosives with no significant blast hazard

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 7,261 100 533 100 411 100 868 28.7 - 25.6 - 23.9 - 7.5
Single modes 6,539 90.1 516 96.9 395 96.1 672 29.7 6 26.6 2.7 24.6 1.6 17.8
Truck 3 6,501 89.5 516 96.7 393 95.5 669 29.8 6 26.6 3.1 25 2.6 17.3
For-hire truck 5,771 79.5 441 82.7 371 90.2 842 28.9 6.4 26.3 5.2 24.1 2.5 14.8
Private Truck S S S S S S 178 S S S S S S 13.7
Air (includes truck and air) S S S S S S 1,672 S S S S S S 46.7
Multiple modes 696 9.6 16 3.0 16 3.8 949 36.2 5.8 16.9 2.5 18.5 1.5 8
Parcel, U.S.P.S. or courier 595 8.2 14 2.6 14 3.4 948 38.5 3.6 16.1 1.7 18.4 1.2 8
Truck and water S S S S S S 2,959 S S S S S S 33.4
Other and unknown modes S S S S - - S S S S S 44.8 0.1 S

Division 1.5, Very insensitive explosives, blasting agent

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 3,413 100 2,423 100 450 100 346 10.7 - 14.6 - 19.6 - 15
Single modes 3,257 95.4 2,413 99.6 423 94.2 295 11.4 1.5 14.7 0.2 19.2 2.5 15.9
Truck 3 3,169 92.8 2,411 99.5 422 93.9 282 11.4 2 14.7 0.2 19.2 2.5 16.5
For-hire truck 1,194 35.0 330 13.6 220 49.0 913 25.9 5.6 23.3 5.4 25 5.7 6.6
Private Truck 1,975 57.9 2,081 85.9 202 44.8 88 16.5 6.8 16.7 5.5 20.2 6.2 13.5
Air (includes truck and air) 88 2.6 2 0.1 S S 1,561 47.1 1.3 48.8 0.1 S S 19.5
Multiple modes 153 4.5 S S S S 833 21.6 1.5 S S S S 23
Parcel, U.S.P.S. or courier 119 3.5 1 - S S 811 29.4 1.6 44.2 - S S 14.2
Truck and water 33 1.0 S S S S 3,135 28.6 2 S S S S 25.5
Other and unknown modes 3 0.1 - - - - S 28.6 - 33.8 - 34.8 - S

Division 2.1, Flammable gases

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 103,480 100 137,220 100 28,616 100 38 9.9 - 12.2 - 17.2 - 11.8
Single modes 100,258 96.9 134,855 98.3 27,354 95.6 35 9.8 0.8 12.3 0.5 16.1 1.2 10.7
Truck 3 40,546 39.2 48,813 35.6 3,958 13.8 32 9.8 3.7 10.9 3.5 12.5 2.9 10.6
For-hire truck 6,742 6.5 8,796 6.4 1,726 6.0 S 10.7 1 10.4 1.2 20.7 1.6 S
Private Truck 33,804 32.7 40,017 29.2 2,232 7.8 28 13.1 3.9 14.9 3.5 14.7 1.7 12.1
Rail 18,031 17.4 25,924 18.9 17,854 62.4 567 24.6 4.5 23.4 4.5 22.6 4.5 12.3
Water 1,193 1.2 1,963 1.4 632 2.2 S 21 0.5 21 0.7 42.3 1.4 S
Shallow draft 409 0.4 489 0.4 S S S 39.9 0.4 36.7 0.5 S S S
Deep draft 784 0.8 1,475 1.1 S S 284 27.8 0.7 22.7 1 S S 40
Air (includes truck and air) 89 0.1 1 - S S 423 43.3 0.1 43.7 - S S 42.3
Pipeline 4 40,398 39.0 58,153 42.4 S S S 21.4 5.6 23.8 5.9 S S S
Multiple modes 2,771 2.7 1,920 1.4 S S 432 30.3 0.8 36.6 0.5 S S 12.8
Parcel, U.S.P.S. or courier 1,254 1.2 13 - 3 - 418 48.9 0.5 36.6 - 32.8 - 13.7
Truck and rail S S S S S S 827 S S S S S S 9.5
Truck and water S S S S S S 4,835 S S S S S S 41.1
Rail and water 543 0.5 725 0.5 112 0.4 145 27.3 0.9 13.4 1.1 23.7 0.9 14.6
Other multiple modes S S S S S S S S S S S S S S
Other and unknown modes 451 0.4 445 0.3 S S S 47.7 0.2 41.4 0.1 S S S

Division 2.2, Nonflammable, nontoxic compressed gases

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 23,020 100 103,457 100 22,521 100 68 13.6 - 15.9 - 19.5 - 15.4
Single modes 21,851 94.9 101,518 98.1 21,550 95.7 54 13.4 1.2 16.2 0.7 19.8 2.1 13.7
Truck 3 19,119 83.1 82,964 80.2 15,353 68.2 53 15.4 4.5 20.2 5.5 24.4 6.7 13.8
For-hire truck 7,476 32.5 13,780 13.3 8,269 36.7 448 26.8 5.1 26.2 3.1 40.4 7.9 18.7
Private Truck 11,642 50.6 69,183 66.9 7,083 31.5 35 15.3 4.8 24.5 7.9 31.5 7.5 13.6
Rail 1,220 5.3 2,609 2.5 2,077 9.2 758 18.8 1.1 27.8 0.5 30.9 2.3 6.5
Water S S S S S S S S S S S S S S
Shallow draft S S S S S S S S S S S S S S
Air (includes truck and air) S S S S S S 955 S S S S S S 30.9
Pipeline 4 1,276 5.5 15,623 15.1 S S S 34.9 4.2 26 4.6 S S S
Multiple modes 861 3.7 1,350 1.3 937 4.2 827 26.9 1 37.3 0.6 42.6 2 16.9
Parcel, U.S.P.S. or courier 267 1.2 S S 4 - 829 35.8 0.4 S S 38.1 - 17.8
Truck and rail 451 2.0 1,108 1.1 817 3.6 728 34.9 1.1 36.6 0.6 45.3 2.5 16.4
Truck and water S S S S S S S S S S S S S S
Other multiple modes S S S S S S 568 S S S S S S 39.2
Other and unknown modes 308 1.3 589 0.6 34 0.1 15 47.3 0.4 47.1 0.3 46.7 0.1 48.3

Division 2.3, Gases toxic by inhalation

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 5,310 100 9,828 100 4,124 100 147 22.7 - 22.9 - 26.5 - 27.8
Single modes 5,069 95.5 9,756 99.3 4,110 99.7 122 23.1 1.5 23.1 0.6 26.6 0.3 19.1
Truck 3 3,230 60.8 S S S S 112 34.8 6.6 S S S S 21.3
For-hire truck 1,706 32.1 S S S S 454 48.2 5.9 S S S S 13.3
Private Truck 1,524 28.7 2,044 20.8 322 7.8 52 26.1 4 35.6 2.9 46.4 1.9 16.5
Rail 1,390 26.2 4,005 40.8 2,551 61.9 580 19.1 6.2 13.5 7.7 28.1 7.8 9.9
Water S S S S S S S S S S S S S S
Shallow draft S S S S S S S S S S S S S S
Air (includes truck and air) S S S S S S 462 S S S S S S 10.1
Pipeline 4 358 6.8 1,449 14.7 S S S 38.6 2.3 47.8 5.1 S S S
Multiple modes S S S S S S 791 S S S S S S 22.1
Parcel, U.S.P.S. or courier S S S S S S 802 S S S S S S 25.2
Truck and rail S S S S S S S S S S S S S S
Truck and water S S S S S S S S S S S S S S
Other and unknown modes S S 22 0.2 S S 102 S S 31.9 0.2 S S 42.8

Division 4.1, Flammable solids

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 2,139 100 19,394 100 5,050 100 269 30 - 21.7 - 24.2 - 16.1
Single modes 1,613 75.4 18,535 95.6 4,895 96.9 217 16.4 7.6 21.5 2.5 24.1 1.9 19.1
Truck 3 952 44.5 9,837 50.7 991 19.6 145 14 11 14.5 7.3 23.5 8 16.6
For-hire truck 680 31.8 6,575 33.9 628 12.4 157 16.1 9.1 13.5 9 30.3 8 18.8
Private Truck 272 12.7 3,263 16.8 S S 119 33.6 5.5 37.7 3.3 S S 32
Rail S S 3,926 20.2 3,313 65.6 909 S S 39.3 5.4 34.7 11.2 14.5
Water S S S S S S 418 S S S S S S 34.9
Shallow draft S S S S S S S S S S S S S S
Deep draft S S S S S S 649 S S S S S S 14.2
Air (includes truck and air) 7 0.3 S S - - 293 46.6 0.7 S S 44.6 - 48
Pipeline 4 9 0.4 S S S S S 44 0.4 S S S S S
Multiple modes S S S S S S 836 S S S S S S 39.6
Parcel, U.S.P.S. or courier 8 0.4 S S S S 852 34.5 0.3 S S S S 42.5
Truck and rail S S S S S S S S S S S S S S
Truck and water S S S S S S S S S S S S S S
Other multiple modes S S S S S S 142 S S S S S S 25.9
Other and unknown modes S S S S S S S S S S S S S S

Division 4.2, Spontaneously combustible materials

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 747 100 94 100 S S 599 34.9 - 37.4 - S S 20.3
Single modes 603 80.7 81 86.6 S S 519 40.3 7.1 42.3 5.9 S S 27.1
Truck 3 594 79.6 80 85.7 S S 477 40.8 7.1 42.7 6 S S 29
For-hire truck 546 73.2 33 35.3 S S 1,143 43.8 10.8 33.2 12.3 S S 19.8
Private Truck 48 6.4 S S S S S 49.7 14.5 S S S S S
Rail S S S S S S S S S S S S S S
Air (includes truck and air) S S S S S S S S S S S S S S
Multiple modes S S S S S S 788 S S S S S S 18.1
Parcel, U.S.P.S. or courier S S S S S S 790 S S S S S S 19.5
Truck and rail S S S S S S 464 S S S S S S 22.6
Other and unknown modes S S S S S S 980 S S S S S S 48.7

Division 4.3, Dangerous when wet materials

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 1,181 100 920 100 453 100 227 29.1 - 21.2 - 35.6 - 25.1
Single modes 1,128 95.5 896 97.4 394 87.1 205 29.3 2.4 21.9 2.5 33.4 5.1 49.8
Truck 3 878 74.3 828 90.0 276 61.0 136 21.8 7 25.8 7.8 48.5 14 46.7
For-hire truck 574 48.6 468 50.8 S S 463 33.6 10.1 41.5 11.5 S S 16.3
Private Truck 304 25.8 360 39.1 S S S 43.2 10.6 44.3 12.5 S S S
Rail 239 20.3 S S S S 1,784 49.5 14 S S S S 27.9
Air (includes truck and air) S S S S - - 1,859 S S S S 41.6 - 27
Multiple modes S S S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S S S
Truck and rail S S S S S S S S S S S S S S
Other and unknown modes 1 0.1 1 0.1 - - S 3.3 0.7 47.6 0.9 49.4 1.1 S

Division 5.1, Oxidizers

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 5,983 100 14,797 100 6,952 100 352 10.3 - 15.2 - 19 - 9.9
Single modes 5,559 92.9 13,711 92.7 6,204 89.2 330 11.2 2.9 16.8 3.4 21.3 5.9 10.5
Truck 3 3,721 62.2 7,685 51.9 2,132 30.7 242 9.1 4.7 14.8 5.6 21.7 6.7 12.4
For-hire truck 2,027 33.9 4,376 29.6 1,666 24.0 513 13.7 3.2 21.2 2.7 24.6 5 12
Private Truck 1,694 28.3 3,309 22.4 466 6.7 75 8.4 3.9 12.8 5.2 21 3.3 20.2
Rail 1,737 29.0 5,929 40.1 4,070 58.5 689 21.5 4.3 23.2 5.6 24.5 7.6 10
Water S S S S S S S S S S S S S S
Deep draft S S S S S S S S S S S S S S
Air (includes truck and air) 68 1.1 1 - S S 1,457 41 0.6 46.6 - S S 14.2
Pipeline 4 S S S S S S S S S S S S S S
Multiple modes 365 6.1 959 6.5 676 9.7 484 38.9 2.8 44.3 3.3 42.8 5.9 38.8
Parcel, U.S.P.S. or courier 49 0.8 2 - 1 - S 49.2 0.6 30 - 43.6 - S
Truck and rail 283 4.7 942 6.4 622 8.9 896 44.1 2.6 44.3 3.6 46.8 6.7 32.4
Truck and water S S S S S S S S S S S S S S
Other and unknown modes S S S S S S S S S S S S S S

Division 5.2, Organic peroxides

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 712 100 162 100 72 100 478 27.4 - 30.1 - 39.7 - 18.2
Single modes 694 97.5 158 97.7 68 94.4 498 28.6 3.5 31.3 4.1 42.9 7.6 20.1
Truck 3 694 97.5 158 97.7 68 94.4 392 28.6 3.5 31.3 4.1 42.9 7.6 16.1
For-hire truck 589 82.8 144 88.9 65 90.9 491 31.1 7.3 34.4 5.2 44.2 8 15.9
Private Truck 104 14.7 S S S S 181 39.4 6 S S S S 25.5
Air (includes truck and air) S S S S S S S S S S S S S S
Multiple modes S S S S S S 393 S S S S S S 26.7
Parcel, U.S.P.S. or courier S S S S S S 379 S S S S S S 28.1
Truck and rail S S S S S S S S S S S S S S
Other and unknown modes S S S S S S S S S S S S S S

Division 6.1, Toxic (poisonous) materials

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes 21,198 100 11,270 100 5,666 100 467 22 - 13.9 - 15.7 - 14.7
Single modes 20,104 94.8 10,449 92.7 5,555 98.0 327 21.9 1.2 12.8 2.2 16 1 12.3
Truck 3 10,128 47.8 2,950 26.2 849 15.0 246 30.1 5.5 14.4 4.6 15 3.7 9.8
For-hire truck 8,682 41.0 2,414 21.4 774 13.7 436 36.3 5 18.8 4.1 16.3 3.2 12.3
Private Truck 1,446 6.8 536 4.8 76 1.3 59 18.2 3.6 12 1.3 16.8 0.7 28.2
Rail 6,782 32.0 5,354 47.5 4,576 80.8 913 20.7 5.5 23.9 9.3 19.2 5.3 14.3
Water S S 1,847 16.4 S S S S S 49.1 13.5 S S S
Shallow draft S S S S S S S S S S S S S S
Deep draft S S S S 23 0.4 S S S S S 22.5 1.6 S
Air (includes truck and air) 36 0.2 1 - S S 767 29 0.1 37.5 - S S 36.2
Pipeline 4 S S 298 2.6 S S S S S 16.2 1.7 S S S
Multiple modes 1,068 5.0 817 7.2 111 2.0 1,013 36 1.2 42.6 2.2 30.8 1 19.9
Parcel, U.S.P.S. or courier S S S S 1 - 1,020 S S S S 36.6 - 19.9
Truck and rail 50 0.2 39 0.3 18 0.3 S 37.1 0.5 43.7 0.4 30.4 0.3 S
Truck and water 6 - 3 - 1 - 237 41.2 0.2 36.4 0.1 46.5 - 49.1
Rail and water 25 0.1 11 0.1 6 0.1 S 26.9 0.4 38.5 0.4 42.7 0.2 S
Other multiple modes S S 762 6.8 86 1.5 117 S S 37.9 2.9 24.4 1.7 23
Other and unknown modes 26 0.1 S S - - S 46.7 0.1 S S 49.8 - S

Division 6.2, Infectious substances

Hazard Class Division and Mode of Transportation Value Tons Ton-miles 1 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent 2007 CV 2 Standard Error of % 2007 CV Standard Error of % 2007 CV Standard Error of %
All modes S S S S S S S S S S S S S S
Single modes S S S S S S S S S S S S S S
Truck 3 S S S S S S S S S S S S S S
Private Truck S S S S S S S S S S S S S S

KEY: S = Estimate does not meet publication standards because of high sampling variability or poor response quality. - = Zero or Less than half the unit shown; thus, it has been rounded to zero.

1 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
2 Coefficient of Variation.
3 "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.
4 Estimates for Pipeline exclude shipments of crude petroleum.

NOTES: Rows are not shown if all cells for that particular row have no values. For example, specific Haz Class Division by mode rows are not shown in this table because there are no data for those rows. Value-of-shipment estimates are reported in current prices. Estimated measures of sampling variability for each estimate known as coefficients of variation (CV) are also provided in these tables. More information on sampling error, confidentiality protection, nonsampling error, sample design, and definitions may be found at http://www.bts.gov/publications/commodity_flow_survey/.

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2007 Economic Census: Transportation Commodity Flow Survey, December 2009.