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 90,753 100 127,526 100 34,461 100 711 9.3 - 13.1 - 15.9 - 18
Less than 50 lbs 3,434 3.8 153 0.1 S S 985 30 1.1 42.1 - S S 17
50 - 99 lbs 1,071 1.2 98 0.1 47 0.1 501 18.1 0.2 17.4 - 41.2 0.1 18.9
100 - 499 lbs 4,222 4.7 754 0.6 234 0.7 331 10.4 0.6 14.3 0.2 14.5 0.2 7.9
500 - 749 lbs 1,530 1.7 387 0.3 120 0.3 314 9.5 0.2 16.4 0.1 19.6 0.1 15.2
750 - 999 lbs 1,287 1.4 319 0.3 86 0.2 270 9.7 0.2 19 0.1 18.9 0.1 10.2
1,000 - 9,999 lbs 17,657 19.5 5,490 4.3 1,624 4.7 269 11 1.4 9.2 1.1 11.3 1 8.5
10,000 - 49,999 lbs 41,051 45.2 52,697 41.3 13,733 39.9 270 11.9 3.4 12.4 3.3 7.6 4.4 7.9
50,000 - 99,999 lbs 3,572 3.9 18,662 14.6 1,598 4.6 81 16.2 0.9 23.2 2.5 15.8 0.9 11.9
More than 100,000 lbs 16,927 18.7 48,967 38.4 16,880 49 592 31 4.3 26.1 5.8 27.9 6.3 5.1

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 82,099 100 120,639 100 30,340 100 249 9 - 12.9 - 15 - 7.6
Less than 50 lbs 818 1 37 - 8 - 191 16.5 0.2 15.7 - 14.5 - 24.9
50 - 99 lbs 407 0.5 63 0.1 13 - 209 11.5 0.1 21.3 - 21.9 - 14.8
100 - 499 lbs 3,618 4.4 712 0.6 200 0.7 285 9.3 0.7 15.8 0.2 19 0.3 7.5
500 - 749 lbs 1,450 1.8 381 0.3 115 0.4 307 10.1 0.2 16.8 0.1 19 0.1 14
750 - 999 lbs 1,281 1.6 317 0.3 86 0.3 272 9.6 0.2 19.3 0.1 18.9 0.1 10.2
1,000 - 9,999 lbs 16,788 20.4 5,366 4.4 1,594 5.3 268 11.8 1.5 9.8 1.1 11.6 1.1 9.1
10,000 - 49,999 lbs 40,008 48.7 51,888 43 12,990 42.8 260 11.9 3.5 12.5 3.3 8.1 4.6 8.6
50,000 - 99,999 lbs 3,533 4.3 18,615 15.4 1,563 5.2 79 16.3 1 23.2 2.6 16.1 1 12.1
More than 100,000 lbs 14,198 17.3 43,262 35.9 13,771 45.4 576 32.4 4.4 27 5.9 28.7 6.4 6

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 69,408 100 85,961 100 17,894 100 240 9.1 - 11.6 - 10.3 - 7.5
Less than 50 lbs 608 0.9 36 - 7 - 161 15.8 0.2 15.9 - 16.8 - 27.8
50 - 99 lbs 394 0.6 62 0.1 13 0.1 207 11.6 0.1 21.4 - 22 - 14.8
100 - 499 lbs 3,551 5.1 710 0.8 199 1.1 285 8.9 0.6 15.9 0.2 19.1 0.4 7.6
500 - 749 lbs 1,445 2.1 380 0.4 115 0.6 307 10.2 0.2 16.9 0.1 19.2 0.1 14.2
750 - 999 lbs 1,266 1.8 316 0.4 85 0.5 271 9.6 0.2 19.4 0.1 19 0.2 10.2
1,000 - 9,999 lbs 16,771 24.2 5,359 6.2 1,589 8.9 268 11.7 1.2 9.8 1.1 11.6 1.1 9.1
10,000 - 49,999 lbs 39,801 57.3 51,773 60.2 12,791 71.5 257 11.9 2.8 12.6 3.5 7.8 2.7 8.7
50,000 - 99,999 lbs 3,440 5 18,415 21.4 1,485 8.3 77 17.2 1.1 23.6 2.6 17.9 1.3 11.7
More than 100,000 lbs 2,131 3.1 8,912 10.4 S S S 38.9 1.2 26.8 3 S S S

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 46,436 100 40,522 100 13,527 100 591 10.2 - 11 - 6.8 - 4.3
Less than 50 lbs 214 0.5 8 - 6 - 722 30.3 0.2 18.2 - 17.1 - 5.9
50 - 99 lbs 124 0.3 16 - 11 0.1 689 17.3 0.1 27 - 23.2 - 8.9
100 - 499 lbs 1,945 4.2 257 0.6 171 1.3 677 13.2 0.7 21.6 0.2 20.9 0.4 5.5
500 - 749 lbs 904 1.9 146 0.4 102 0.8 701 16.8 0.3 25.1 0.1 22.6 0.2 7.3
750 - 999 lbs 744 1.6 106 0.3 66 0.5 619 14.5 0.3 16.2 0.1 22.1 0.2 10.1
1,000 - 9,999 lbs 10,062 21.7 2,053 5.1 1,298 9.6 635 9.2 1.5 10.5 0.7 12.2 0.9 5.1
10,000 - 49,999 lbs 29,659 63.9 27,602 68.1 10,745 79.4 421 14.1 3.1 13.3 3.2 7.6 1.2 8.1
50,000 - 99,999 lbs 1,931 4.2 9,087 22.4 933 6.9 96 23.3 1 17.1 2.7 17.6 1.1 9.7
More than 100,000 lbs 852 1.8 S S 196 1.5 S 47.4 1 S S 19.9 0.3 S

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 22,972 100 45,440 100 4,367 100 60 11.9 - 22.4 - 31.7 - 6.7
Less than 50 lbs 394 1.7 28 0.1 1 - 38 18 0.4 20 - 26.1 - 17
50 - 99 lbs 271 1.2 46 0.1 2 0.1 50 13.7 0.2 23.1 - 33.5 - 12.9
100 - 499 lbs 1,606 7 453 1 28 0.6 59 10.4 0.8 15.4 0.4 22.4 0.4 12.1
500 - 749 lbs 540 2.4 234 0.5 13 0.3 55 12.2 0.4 26.2 0.2 25.9 0.2 12.2
750 - 999 lbs 522 2.3 210 0.5 20 0.5 91 11.3 0.6 22.1 0.3 34 0.4 20.9
1,000 - 9,999 lbs 6,709 29.2 3,305 7.3 291 6.7 83 19.1 2.8 13.4 2.1 17.4 3 10.5
10,000 - 49,999 lbs 10,142 44.2 24,170 53.2 2,046 46.9 81 15.4 3.1 26.4 4.5 25.2 6.8 11.5
50,000 - 99,999 lbs 1,508 6.6 9,327 20.5 552 12.6 59 20.8 1.4 44.1 3 40.5 2.7 23.9
More than 100,000 lbs S S 7,666 16.9 S S 134 S S 33.5 5.4 S S 40.4

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 3,617 100 7,582 100 5,440 100 801 10.3 - 14.3 - 16.6 - 7.8
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs S S S S S S S S S S S S S S
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S 3 - 4 0.1 1,477 S S 28.8 - 42.6 0.1 25.5
10,000 - 49,999 lbs 207 5.7 115 1.5 S S 1,723 43.2 3.6 43 0.7 S S 18.5
50,000 - 99,999 lbs S S 159 2.1 77 1.4 S S S 48.4 2.2 30 1.8 S
More than 100,000 lbs 3,335 92.2 7,305 96.4 5,159 94.8 736 11.3 2.6 14.9 1.4 16.5 1.5 6.6

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 4,814 100 16,523 100 5,895 100 S 39.7 - 34.6 - 38.1 - S
Less than 50 lbs 1 - - - - - 16 32 0.1 34 - 34 - -
50 - 99 lbs 1 - - - - - 16 45.4 - 37.5 - 37.5 - -
100 - 499 lbs S S 1 - - - 16 S S 44.3 0.1 44.3 - -
500 - 749 lbs 2 - 1 - - - 16 40.4 - 44.7 - 44.7 - -
750 - 999 lbs 1 - 1 - - - 16 42.2 0.9 35.7 0.1 35.7 - -
1,000 - 9,999 lbs 6 0.1 3 - - - 16 36.2 0.5 32.2 0.1 32.2 - -
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs S S S S S S 16 S S S S S S -
More than 100,000 lbs 4,784 99.4 16,499 99.9 5,895 100 255 39.8 0.8 34.6 0.1 38.1 - 20.2

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 2,780 100 10,427 100 3,218 100 S 34.7 - 33.7 - 34.5 - S
Less than 50 lbs 1 - - - - - 16 32 0.1 34 - 34 - -
50 - 99 lbs 1 - - - - - 16 45.4 - 37.5 - 37.5 - -
100 - 499 lbs S S 1 - - - 16 S S 44.3 0.1 44.3 - -
500 - 749 lbs 2 0.1 1 - - - 16 40.4 - 44.7 - 44.7 - -
750 - 999 lbs 1 - 1 - - - 16 42.2 0.9 35.7 0.1 35.7 - -
1,000 - 9,999 lbs 6 0.2 3 - - - 16 36.2 0.5 32.2 0.1 32.2 - -
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs S S S S S S 16 S S S S S S -
More than 100,000 lbs 2,750 98.9 10,403 99.8 3,218 100 236 34.8 0.8 33.7 0.1 34.5 - 23.8

Deep 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 2,034 100 6,096 100 2,677 100 345 39.8 - 28 - 37.7 - 27.2
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 - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 2,034 100 6,096 100 2,677 100 345 39.8 - 28 - 37.7 - 27.2

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 304 100 4 100 4 100 1,085 40 - 40.4 - 32.6 - 9.2
Less than 50 lbs 209 68.9 1 16.2 1 19.5 1,089 41.2 9.4 29.1 10 29.1 9.4 9.5
50 - 99 lbs S S - 5.1 - 4.5 844 S S 46.1 12.7 44.5 8.5 22.1
100 - 499 lbs S S 1 18.5 1 24 1,372 S S 35.9 13.3 26.9 12.7 16.2
500 - 749 lbs S S S S S S S S S S S S S S
750 - 999 lbs S S S S - 11.2 S S S S S 42.7 6.5 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 - - - - - - - - - - - - - -
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 3,957 100 10,568 100 S S S 34.4 - 36.5 - 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 - - - - - - - - - - - - - -
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 3,947 99.8 10,545 99.8 S S S 34.7 10.6 36.7 9.9 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 6,791 100 5,679 100 3,786 100 1,156 27.1 - 32.8 - 34.5 - 10.4
Less than 50 lbs 2,590 38.1 S S S S 1,164 39.4 6.1 S S S S 10.9
50 - 99 lbs 655 9.7 34 0.6 S S 1,048 32.4 1.3 46.5 0.8 S S 9.9
100 - 499 lbs 487 7.2 36 0.6 34 0.9 959 31.7 2 31.5 0.4 32.7 0.7 9.3
500 - 749 lbs S S S S S S 1,172 S S S S S S 20
750 - 999 lbs S S - - S S 806 S S 44.7 - S S 23.7
1,000 - 9,999 lbs 16 0.2 3 0.1 S S 2,637 36.5 0.5 26.6 0.1 S S 47.9
10,000 - 49,999 lbs 537 7.9 376 6.6 658 17.4 1,752 25.7 1.9 25.9 2.3 28.8 7 10.9
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 2,398 35.3 5,086 89.6 2,884 76.2 680 35.6 6.2 34.1 3.6 39.5 8.6 10.2

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 3,808 100 189 100 202 100 1,155 32.9 - 42.9 - 48.4 - 10.5
Less than 50 lbs 2,590 68 S S S S 1,164 39.4 6.1 S S S S 10.9
50 - 99 lbs 655 17.2 34 18 S S 1,048 32.4 1.6 46.5 2.6 S S 9.9
100 - 499 lbs 486 12.8 36 19.1 33 16.4 953 31.8 4.6 31.6 6.2 34.2 7.7 8.6
500 - 749 lbs S S S S S S 1,172 S S S S S S 20
750 - 999 lbs - - - - - - 598 42.9 - 1.9 0.2 39.5 0.2 41.2
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 1,550 100 2,144 100 1,785 100 1,160 26.7 - 23 - 23.3 - 12.4
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 S S S S S S S S S S S S S S
1,000 - 9,999 lbs 6 0.4 2 0.1 S S 1,332 26.6 0.2 38.8 0.1 S S 33.2
10,000 - 49,999 lbs 391 25.2 277 12.9 502 28.1 1,843 31.7 9.8 33.3 6.8 37.3 9.1 11
50,000 - 99,999 lbs S S S S S S 700 S S S S S S 12.6
More than 100,000 lbs 1,124 72.5 1,841 85.9 1,263 70.7 701 33.4 9.8 25.5 6.7 30.3 9 10.7

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 S S S S S S 1,682 S S S S S S 46.1
Less than 50 lbs S S S S S S S S S S S S S S
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 S S S S S S S S S S S S S S
10,000 - 49,999 lbs 63 6.5 S S S S 1,462 38.1 15.8 S S S S 19.6
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs S S S S S S 380 S S S S S S 20.6

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 S S S S S S S S S S S S S S
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs S S S S S S S S S S S S S S

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 383 100 789 100 239 100 1,408 31.7 - 47.9 - 46.3 - 28.9
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 1,626 S S S S S S 1
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 300 78.3 762 96.6 S S S 35.8 11.2 40.4 1.8 S S S

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 1,862 100 1,207 100 335 100 85 26.5 - 25.1 - 43.9 - 26.6
Less than 50 lbs S S S S S S 45 S S S S S S 21.1
50 - 99 lbs S S S S S S 58 S S S S S S 28.7
100 - 499 lbs S S 6 0.5 S S 30 S S 38.1 0.5 S S 45.9
500 - 749 lbs 4 0.2 2 0.2 S S S 46.9 8.3 38.8 12.3 S S S
750 - 999 lbs S S 2 0.2 - - 12 S S 43.1 0.5 39.5 - 12.5
1,000 - 9,999 lbs 853 45.8 120 10 20 6.1 250 48.1 12.6 44.9 2.3 43.2 6.6 39.2
10,000 - 49,999 lbs 506 27.2 433 35.9 85 25.3 189 49.7 12.1 41 11.8 25.9 14.4 43.6
50,000 - 99,999 lbs S S 21 1.8 S S S S S 6.9 4.6 S S S
More than 100,000 lbs 331 17.8 619 51.3 S S 496 12.1 7.9 31.5 9.8 S S 29.7

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.