Table 4. Shipment Characteristics by Mode of Transportation and Shipment Weight for State of Origin: 2007

Table 4. Shipment Characteristics by Mode of Transportation and Shipment Weight for State of Origin: 2007

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

Excel | CSV

All modes

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 355,503 100 379,374 100 75,389 100 491 4.8 - 7 - 4.5 - 6
Less than 50 lbs 27,070 7.6 484 0.1 259 0.3 604 6.3 0.4 8.3 - 12.1 0.1 5.8
50 - 99 lbs 7,454 2.1 351 0.1 133 0.2 382 9.6 0.2 13.7 - 14 - 8.9
100 - 499 lbs 22,786 6.4 1,969 0.5 666 0.9 341 7.5 0.6 9.1 0.1 9.9 0.1 4.9
500 - 749 lbs 7,986 2.2 1,063 0.3 316 0.4 296 14.4 0.3 8.4 - 7.8 - 7.1
750 - 999 lbs 6,102 1.7 956 0.3 261 0.3 272 10.4 0.1 7.3 - 8.7 - 9
1,000 - 9,999 lbs 88,673 24.9 22,257 5.9 7,091 9.4 296 10.2 2 9.2 0.5 14.1 1.3 7.1
10,000 - 49,999 lbs 152,104 42.8 207,329 54.7 34,838 46.2 187 4.7 1.2 8.4 2.6 3.2 1.8 6.5
50,000 - 99,999 lbs 23,920 6.7 63,937 16.9 5,601 7.4 86 12.1 0.7 11.3 1.4 8.4 0.9 13.8
More than 100,000 lbs 19,407 5.5 81,026 21.4 26,224 34.8 492 12.7 0.5 12.1 2.1 11.4 2.8 6.7

Single modes

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 303,707 100 355,473 100 65,706 100 244 4.8 - 7.4 - 5.2 - 8
Less than 50 lbs 5,718 1.9 159 - 39 0.1 253 8.6 0.1 11.5 - 23.4 - 17.9
50 - 99 lbs 2,830 0.9 192 0.1 45 0.1 239 9.5 0.1 14.8 - 26.4 - 16.6
100 - 499 lbs 15,809 5.2 1,589 0.4 431 0.7 264 8.4 0.5 9 - 7.9 0.1 4.4
500 - 749 lbs 7,040 2.3 996 0.3 276 0.4 276 14.9 0.3 9 - 9.5 - 8.4
750 - 999 lbs 6,017 2 936 0.3 253 0.4 269 10.6 0.2 7.4 - 9 - 9.8
1,000 - 9,999 lbs 83,920 27.6 21,460 6 6,373 9.7 283 9.5 2.1 8.8 0.6 11.6 1.2 7.4
10,000 - 49,999 lbs 145,482 47.9 203,160 57.2 32,234 49.1 177 4.8 1.3 8.5 2.7 3.2 2.5 6.6
50,000 - 99,999 lbs 21,226 7 61,007 17.2 4,240 6.5 68 10.9 0.7 11.3 1.4 5.5 0.6 12.2
More than 100,000 lbs 15,665 5.2 65,976 18.6 21,814 33.2 485 10.8 0.4 14.6 2.2 14.2 3.4 8.2

Truck3

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 281,871 100 295,034 100 44,600 100 229 4.7 - 7.4 - 2.9 - 8.5
Less than 50 lbs 4,643 1.6 153 0.1 34 0.1 224 7.8 0.1 11.9 - 27.9 - 20.6
50 - 99 lbs 2,637 0.9 190 0.1 42 0.1 228 11.1 0.1 15 - 28.1 - 17
100 - 499 lbs 15,506 5.5 1,584 0.5 425 1 260 8.5 0.5 9.1 0.1 7.9 0.1 4.4
500 - 749 lbs 6,770 2.4 992 0.3 273 0.6 274 13.6 0.3 8.8 - 9.2 0.1 8.5
750 - 999 lbs 5,984 2.1 932 0.3 247 0.6 263 10.7 0.2 7.4 - 9.2 0.1 10
1,000 - 9,999 lbs 80,211 28.5 20,952 7.1 5,874 13.2 273 9.1 2 8.5 0.6 10.2 1.2 7.9
10,000 - 49,999 lbs 143,651 51 201,994 68.5 31,665 71 175 4.8 1.1 8.6 1.9 3 1.9 6.4
50,000 - 99,999 lbs 20,226 7.2 59,662 20.2 3,788 8.5 63 11.2 0.7 11.3 1.9 6.3 0.4 10.5
More than 100,000 lbs 2,243 0.8 8,575 2.9 2,252 5 291 29.9 0.2 18.2 0.5 34.6 1.6 27.9

For-hire truck

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 193,929 100 169,588 100 36,864 100 513 6.4 - 6.3 - 3.6 - 6.3
Less than 50 lbs 1,538 0.8 41 - 28 0.1 680 14.1 0.1 22.7 - 33.7 - 8.5
50 - 99 lbs 1,219 0.6 50 - 35 0.1 717 11.5 0.1 17.1 - 29.4 - 10.1
100 - 499 lbs 9,697 5 598 0.4 368 1 609 12 0.6 10.3 - 7.7 0.1 4.7
500 - 749 lbs 4,609 2.4 411 0.2 234 0.6 565 19.9 0.4 10.4 - 9.7 0.1 6.8
750 - 999 lbs 4,254 2.2 367 0.2 208 0.6 567 16.8 0.3 13.3 - 12.2 0.1 4.3
1,000 - 9,999 lbs 52,562 27.1 8,693 5.1 4,696 12.7 541 13.1 2.2 7.9 0.4 12.3 1.5 4.7
10,000 - 49,999 lbs 106,192 54.8 112,031 66.1 26,309 71.4 275 5.5 1.8 7.3 2.3 3.9 2.1 5.6
50,000 - 99,999 lbs 11,929 6.2 41,191 24.3 2,849 7.7 67 15.8 0.7 13.2 2.7 8.7 0.5 14.3
More than 100,000 lbs 1,929 1 6,206 3.7 2,137 5.8 397 32.7 0.3 25.5 1 36.9 1.9 39

Private truck

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 87,943 100 125,446 100 7,736 100 59 5.7 - 14.7 - 14 - 3.6
Less than 50 lbs 3,105 3.5 112 0.1 6 0.1 48 13.9 0.5 16.7 - 13.4 - 5.5
50 - 99 lbs 1,418 1.6 140 0.1 8 0.1 53 17.1 0.3 17.5 - 26.4 - 9.7
100 - 499 lbs 5,809 6.6 986 0.8 58 0.7 57 9.5 0.7 13.1 0.1 13.7 0.1 5.2
500 - 749 lbs 2,161 2.5 581 0.5 39 0.5 68 11.6 0.3 17.1 0.1 25.5 0.2 9.9
750 - 999 lbs 1,731 2 566 0.5 39 0.5 68 9.8 0.1 12.5 0.1 20.7 0.1 8.5
1,000 - 9,999 lbs 27,649 31.4 12,259 9.8 1,178 15.2 83 16 3.6 14.6 1.3 18.4 3.1 3.9
10,000 - 49,999 lbs 37,459 42.6 89,964 71.7 5,355 69.2 66 5.1 2.4 18.3 2.3 18.1 2.8 7.2
50,000 - 99,999 lbs 8,297 9.4 18,470 14.7 939 12.1 52 17 1.8 10 1.8 10 1.9 5.2
More than 100,000 lbs 315 0.4 2,368 1.9 114 1.5 55 39.6 0.2 30.6 0.7 33.3 0.5 35.2

Rail

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 19,276 100 56,048 100 20,442 100 644 15.3 - 16.5 - 14.3 - 11.2
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs S S S S S S S S S S S S S S
100 - 499 lbs S S S S S S S S S S S S S S
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S S S S S 939 S S S S S S 23.8
10,000 - 49,999 lbs 1,781 9.2 1,151 2.1 565 2.8 542 32 3.1 29.4 1.2 23.7 1.4 19
50,000 - 99,999 lbs 996 5.2 1,338 2.4 452 2.2 S 34.1 1.8 28.6 1.1 29.5 2.3 S
More than 100,000 lbs 12,916 67 53,061 94.7 18,939 92.6 545 12 5.1 17.3 2 15.2 3.3 9.4

Water

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total S S 3,586 100 S S 152 S S 48 - S S 30.9
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs S S S S - - S S S S S 32.6 1.8 S
50,000 - 99,999 lbs S S 1 - S S 29 S S 40.6 0.5 S S 38
More than 100,000 lbs S S 3,583 99.9 S S 157 S S 48.1 0.2 S S 30.4

Shallow draft

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total S S 3,586 100 S S 152 S S 48 - S S 30.9
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs S S S S - - S S S S S 32.6 1.8 S
50,000 - 99,999 lbs S S 1 - S S 29 S S 40.6 0.5 S S 38
More than 100,000 lbs S S 3,583 99.9 S S 157 S S 48.1 0.2 S S 30.4

Air (incl truck and air)

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 2,046 100 37 100 41 100 923 38.8 - 31.2 - 37.4 - 14.8
Less than 50 lbs 1,075 52.6 5 14.8 5 12.4 873 42.1 7.4 39.9 7.3 37.3 7 15.7
50 - 99 lbs 193 9.4 2 5 3 6.4 1,381 39 4.2 34.8 2.5 38 3.6 13.6
100 - 499 lbs 302 14.8 4 11.7 6 14.8 1,375 33.1 5.2 25.4 4.3 30.1 5.2 11.7
500 - 749 lbs S S S S S S 700 S S S S S S 25.5
750 - 999 lbs 33 1.6 S S S S 1,742 47.1 0.6 S S S S 21.7
1,000 - 9,999 lbs 126 6.2 S S S S 1,459 40.2 1.1 S S S S 14.6
10,000 - 49,999 lbs 47 2.3 8 21.1 4 11 S 42.6 6.4 48.4 17.6 28.6 10.6 S
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

Pipeline4

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 463 100 768 100 S S S 34 - 34.1 - S S S
Less than 50 lbs S S S S S S S S S S S S S S
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs S S S S S S S S S S S S S S
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 455 98.3 757 98.6 S S S 35.1 10.1 35.1 10.3 S S S

Multiple modes

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 43,337 100 13,455 100 8,805 100 736 6.9 - 10.7 - 8.4 - 4.3
Less than 50 lbs 20,879 48.2 304 2.3 218 2.5 748 7.2 2.7 11.1 0.2 13.6 0.4 4.3
50 - 99 lbs 4,467 10.3 145 1.1 87 1 597 14.9 1.9 17.4 0.3 15.9 0.2 7
100 - 499 lbs 6,651 15.3 336 2.5 229 2.6 626 15.8 2.2 19.8 0.6 17.7 0.6 7.8
500 - 749 lbs 872 2 52 0.4 38 0.4 732 31.6 0.7 23.5 0.1 20 0.1 17.5
750 - 999 lbs 50 0.1 S S S S S 36.2 - S S S S S
1,000 - 9,999 lbs S S S S S S S S S S S S S S
10,000 - 49,999 lbs 3,026 7 2,996 22.3 2,114 24 787 21.7 1.2 22.7 3.3 9.5 3.4 20.7
50,000 - 99,999 lbs 2,440 5.6 2,556 19 1,249 14.2 471 34.9 1.6 32.4 5.1 29.9 4 49.2
More than 100,000 lbs 1,960 4.5 6,652 49.4 4,290 48.7 584 26.4 1.2 15.3 7.2 17.9 7.1 7.2

Parcel, U.S.P.S. or courier

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 32,886 100 841 100 558 100 734 6.1 - 13.2 - 11.5 - 4.3
Less than 50 lbs 20,879 63.5 304 36.2 218 39.1 748 7.2 2.2 11.1 3.2 13.6 2.9 4.3
50 - 99 lbs 4,464 13.6 145 17.2 86 15.5 596 14.9 2.2 17.4 1.3 15.8 1.4 7
100 - 499 lbs 6,633 20.2 333 39.5 215 38.6 605 15.7 2.4 19.7 3.3 16.1 2.9 8.7
500 - 749 lbs 867 2.6 51 6.1 35 6.3 691 31.8 0.9 24 1.5 21.7 2.2 18.4
750 - 999 lbs 44 0.1 S S S S 388 40.9 0.1 S S S S 39.9
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

Truck and rail

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 9,542 100 8,014 100 4,938 100 940 22.9 - 16.7 - 13.1 - 9.4
Less than 50 lbs S S - - S S S S S 30.2 - S S S
50 - 99 lbs S S S S S S S S S S S S S S
100 - 499 lbs 5 0.1 1 - S S 1,086 27 - 33.3 - S S 32
500 - 749 lbs S S S S S S 1,928 S S S S S S 12.2
750 - 999 lbs S S S S S S 2,248 S S S S S S 1.4
1,000 - 9,999 lbs S S S S S S 1,365 S S S S S S 10.7
10,000 - 49,999 lbs 2,528 26.5 2,060 25.7 1,375 27.8 757 17.5 7.8 24.1 3.3 13.7 2.6 21.9
50,000 - 99,999 lbs 2,329 24.4 1,282 16 509 10.3 S 36.8 5.8 43.9 5.3 37.5 3.5 S
More than 100,000 lbs 1,711 17.9 4,267 53.2 2,494 50.5 574 31.3 6.3 26.1 9.1 26.8 7.8 8

Truck and water

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 279 100 3,223 100 1,693 100 S 21.4 - 29 - 33.6 - S
Less than 50 lbs S S S S S S 1,905 S S S S S S 30.6
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs 13 4.8 S S S S 6,363 47.4 7.6 S S S S 1
500 - 749 lbs S S S S S S 6,088 S S S S S S 34.7
750 - 999 lbs S S S S S S 6,457 S S S S S S 43.8
1,000 - 9,999 lbs 26 9.4 3 0.1 16 0.9 6,192 37.7 7.5 19.8 2.1 32.2 5.7 26.2
10,000 - 49,999 lbs 125 45 816 25.3 560 33.1 S 26.1 9.6 37.3 17.3 30.7 12 S
50,000 - 99,999 lbs 47 17 1,170 36.3 624 36.9 536 19.2 12.7 22.3 15.6 26.5 11.9 14.8
More than 100,000 lbs S S S S S S S S S S S S S S

Rail and water

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total S S S S S S S S S S S S S S
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs S S S S S S S S S S S S S S
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs - - - - - - - - - - - - - -

Other multiple modes

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 300 100 1,308 100 1,474 100 S 35.1 - 42.3 - 41.9 - S
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs S S S S S S S S S S S S S S
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs 3 1 S S 1 - S 33.8 4.8 S S 34.7 0.5 S
10,000 - 49,999 lbs S S S S S S S S S S S S S S
50,000 - 99,999 lbs S S S S S S 933 S S S S S S 25.8
More than 100,000 lbs 191 63.7 1,153 88.2 1,321 89.6 1,205 41 16.3 40.7 5.7 39.6 4.8 4.7

Other and unknown modes

Shipment Weight Value Tons Ton-miles1 Average miles per shipment Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent 2007
(thousands)
Percent 2007
(millions)
Percent CV2 Standard
Error of %
CV Standard
Error of %
CV Standard
Error of %
Total 8,458 100 S S 878 100 122 22.9 - S S 15 - 45.3
Less than 50 lbs 472 5.6 21 0.2 2 0.2 S 25 1.9 45.3 1.2 25.8 0.1 S
50 - 99 lbs 157 1.9 14 0.1 1 0.1 S 37.6 1 35.8 0.6 44.2 0.1 S
100 - 499 lbs 326 3.9 45 0.4 6 0.6 S 19.6 1.7 15.4 0.7 31.8 0.3 S
500 - 749 lbs 74 0.9 15 0.1 2 0.2 S 24.4 0.4 32.5 0.5 30.4 0.1 S
750 - 999 lbs 35 0.4 11 0.1 2 0.2 158 34.9 0.2 22.3 0.3 40.4 0.1 42
1,000 - 9,999 lbs 1,760 20.8 392 3.8 143 16.3 365 20.2 2.1 8.8 6.1 21.7 3 16.9
10,000 - 49,999 lbs 3,596 42.5 1,174 11.2 490 55.8 480 19.4 6.6 20.7 13.3 19.9 6.1 17.5
50,000 - 99,999 lbs S S 375 3.6 112 12.7 S S S 46.5 5.8 48.4 3.9 S
More than 100,000 lbs S S S S 120 13.7 S S S S S 29.6 9.7 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 truck and for-hire truck.
4 Estimates for pipeline exclude shipments of crude petroleum.

NOTES: Rows are not shown if all cells for that particular state by mode have no data. For example, since North Carolina by "Pipeline" has no data for any weight grouping, the entire mode of "Pipeline" for that state was removed from this table. However, if a state by mode has at least one row of data for one of the weight groupings, then the entire state by mode is shown even though there may be rows absent of data within that mode. For example, North Carolina by "Air" has a few rows absent of data but since the other rows within that mode do have data, that state by mode will be shown in its entirety for all the weight groupings. Value-of-shipments estimates have not been adjusted for price changes. 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.