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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

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

Tuesday, July 3, 2012

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 194,444 100 246,958 100 50,629 100 626 4 - 10.1 - 18.9 - 7.9
Less than 50 lbs 23,452 12.1 406 0.2 238 0.5 802 9.6 1.2 10.3 - 15.7 0.1 6.7
50 - 99 lbs 4,828 2.5 324 0.1 91 0.2 273 9.3 0.3 9.7 - 15.9 - 11.3
100 - 499 lbs 15,240 7.8 1,672 0.7 455 0.9 271 6.2 0.6 10.7 0.1 30.1 0.4 13.9
500 - 749 lbs 5,488 2.8 887 0.4 198 0.4 224 17 0.5 8.5 0.1 28.7 0.2 15.5
750 - 999 lbs 3,364 1.7 779 0.3 178 0.4 225 10.2 0.2 8.1 - 24 0.1 14.7
1,000 - 9,999 lbs 36,709 18.9 11,676 4.7 2,646 5.2 213 6.4 1 5.3 0.4 5.2 0.8 6.1
10,000 - 49,999 lbs 89,202 45.9 131,914 53.4 19,764 39 160 7.8 2.9 6.2 2.7 7.5 4.4 7
50,000 - 99,999 lbs 9,302 4.8 39,775 16.1 3,492 6.9 85 17 0.8 8.9 1.4 13.3 1.3 15.3
More than 100,000 lbs 6,858 3.5 59,525 24.1 23,567 46.5 421 21.5 0.7 31 3.9 37.3 6.3 15.6

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 162,401 100 240,047 100 47,987 100 388 5.2 - 10.6 - 20.5 - 22.5
Less than 50 lbs 5,348 3.3 177 0.1 59 0.1 648 14.5 0.6 17.8 - 46.9 0.1 21.8
50 - 99 lbs 1,932 1.2 208 0.1 37 0.1 175 5.3 0.1 13 - 34.7 - 21.8
100 - 499 lbs 10,800 6.7 1,434 0.6 344 0.7 234 6.5 0.6 12.8 0.1 40.1 0.4 18.6
500 - 749 lbs 5,046 3.1 826 0.3 181 0.4 220 17.9 0.6 9 0.1 31.5 0.2 16.4
750 - 999 lbs 3,315 2 766 0.3 173 0.4 223 10.2 0.2 8.3 - 24.7 0.1 15
1,000 - 9,999 lbs 34,219 21.1 11,336 4.7 2,491 5.2 206 6.5 1.4 5.8 0.4 4.3 0.8 6.6
10,000 - 49,999 lbs 87,263 53.7 130,955 54.6 19,019 39.6 155 7.8 2.5 6.2 3.1 7.7 5.2 7.3
50,000 - 99,999 lbs 9,172 5.6 39,277 16.4 3,277 6.8 81 17.2 0.9 9.3 1.4 14.1 1.5 15.3
More than 100,000 lbs 5,306 3.3 55,069 22.9 22,407 46.7 424 25.6 0.6 34.8 4.3 40 7.2 16.3

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 156,076 100 188,599 100 25,963 100 375 4.8 - 6 - 6.4 - 24.1
Less than 50 lbs 4,931 3.2 173 0.1 S S 626 14.6 0.6 18.3 - S S 24.2
50 - 99 lbs 1,767 1.1 206 0.1 36 0.1 169 7.4 0.1 13.1 - 36.3 0.1 22.5
100 - 499 lbs 10,116 6.5 1,431 0.8 341 1.3 233 6.7 0.5 12.9 0.1 40.4 0.6 18.8
500 - 749 lbs 4,836 3.1 824 0.4 180 0.7 219 19.3 0.7 9 0.1 31.7 0.2 16.5
750 - 999 lbs 3,304 2.1 765 0.4 173 0.7 222 10.2 0.2 8.3 - 24.8 0.2 15
1,000 - 9,999 lbs 33,659 21.6 11,279 6 2,429 9.4 202 6.2 1.5 5.6 0.3 4.2 0.6 7.1
10,000 - 49,999 lbs 87,149 55.8 130,808 69.4 18,891 72.8 155 7.8 2.4 6.2 1.1 7.7 2 7.4
50,000 - 99,999 lbs 9,125 5.8 39,167 20.8 3,236 12.5 81 17.2 1 9.3 1.2 14 1.4 15.2
More than 100,000 lbs 1,190 0.8 3,946 2.1 624 2.4 220 21.1 0.2 30.9 0.6 29.8 0.7 26.4

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 85,662 100 92,291 100 20,002 100 910 7.2 - 7.3 - 8.5 - 13.4
Less than 50 lbs 2,132 2.5 50 0.1 S S 1,255 35.5 1 44.4 - S S 14.7
50 - 99 lbs 496 0.6 37 - 27 0.1 725 17.9 0.1 39.9 - 48.2 0.1 15.2
100 - 499 lbs 4,850 5.7 394 0.4 284 1.4 713 10.6 0.9 38.5 0.2 47.2 0.9 7.5
500 - 749 lbs 2,851 3.3 219 0.2 146 0.7 663 27.1 1 28.8 0.1 38.8 0.4 9.1
750 - 999 lbs 1,856 2.2 186 0.2 138 0.7 736 18.1 0.4 24.7 0.1 30.6 0.3 10.1
1,000 - 9,999 lbs 18,523 21.6 3,223 3.5 1,861 9.3 620 8.8 1.1 6.3 0.3 4.4 0.9 5.4
10,000 - 49,999 lbs 49,573 57.9 68,068 73.8 15,079 75.4 256 10.4 2.1 7.6 2.3 10.6 2.9 6.4
50,000 - 99,999 lbs 4,414 5.2 18,241 19.8 1,917 9.6 101 19.4 0.9 15.6 2.2 22.8 1.7 28.1
More than 100,000 lbs 966 1.1 S S 501 2.5 496 27.6 0.4 S S 38.8 1 31.5

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 70,415 100 96,307 100 5,961 100 53 7.1 - 7.7 - 6.2 - 7.7
Less than 50 lbs 2,799 4 123 0.1 6 0.1 43 18.8 0.8 17.3 - 21.3 - 8.7
50 - 99 lbs 1,270 1.8 170 0.2 9 0.1 54 8.7 0.2 13.9 - 16.5 - 11.8
100 - 499 lbs 5,265 7.5 1,036 1.1 57 1 54 7 0.8 8.4 0.1 11.5 0.1 12.7
500 - 749 lbs 1,985 2.8 605 0.6 35 0.6 57 10.1 0.3 7.5 0.1 11.1 0.1 11.6
750 - 999 lbs 1,448 2.1 579 0.6 35 0.6 59 11.2 0.4 9.5 0.1 21.2 0.2 13.3
1,000 - 9,999 lbs 15,136 21.5 8,056 8.4 567 9.5 64 8.3 2.7 8.2 0.7 12.4 1 11.2
10,000 - 49,999 lbs 37,576 53.4 62,740 65.1 3,812 63.9 61 15.5 5.1 8.1 1.7 8.6 3.7 10.4
50,000 - 99,999 lbs 4,711 6.7 20,926 21.7 1,318 22.1 62 17.9 1.5 10.7 1.4 12.4 2.8 6.7
More than 100,000 lbs 224 0.3 2,072 2.2 123 2.1 S 33.8 0.1 36.3 0.6 44 0.8 S

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 4,262 100 51,261 100 21,942 100 471 31.3 - 37.9 - 40.8 - 15.7
Less than 50 lbs S S S S S S S S S S S S S S
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 S S S S S S S S S S S S S S
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S 29 0.1 S S 325 S S 39.5 0.4 S S 29.3
10,000 - 49,999 lbs 103 2.4 S S 127 0.6 825 47.7 3.5 S S 45.3 2.3 35.9
50,000 - 99,999 lbs 21 0.5 52 0.1 40 0.2 747 40.7 1 44 0.5 38.5 0.7 21.2
More than 100,000 lbs 4,085 95.8 51,037 99.6 21,767 99.2 502 33.2 3 38.1 0.6 41.3 1.8 15.8

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 35 100 92 100 S S S 29.3 - 35.5 - 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 S S S S S S 38 S S S S S S 3.1
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 77 83.9 15 95.1 167 S S 20.1 11.4 44.8 3.5 30.9

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 35 100 92 100 S S S 29.3 - 35.5 - 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 S S S S S S 38 S S S S S S 3.1
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 77 83.9 15 95.1 167 S S 20.1 11.4 44.8 3.5 30.9

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 2,001 100 S S S S 1,504 26.4 - S S S S 10.3
Less than 50 lbs 417 20.8 3 8.4 4 6.5 1,532 21.6 4.2 28 7.7 28.4 7.2 11.2
50 - 99 lbs 161 8.1 1 3.6 1 2.1 1,021 29.8 3.2 27.5 3.2 37.2 3.8 23.5
100 - 499 lbs 681 34 2 5 2 3.8 1,342 32.2 7.2 20.1 7.1 33.5 7.3 11.9
500 - 749 lbs S S S S 1 1.6 738 S S S S 42.5 5.8 31.7
750 - 999 lbs S S - 1.1 1 0.8 S S S 30.9 1.6 22.4 2.3 S
1,000 - 9,999 lbs 516 25.8 S S S S 1,880 46.3 7.2 S S S S 20.5
10,000 - 49,999 lbs S S 1 1.4 1 0.8 1,063 S S 49.6 3.4 18.3 7.8 49.2
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 26 100 S S S S S 48.4 - 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 S S S S S S S S S S S 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 26,897 100 5,146 100 1,919 100 890 11.2 - 37.7 - 16.8 - 7.6
Less than 50 lbs 17,542 65.2 209 4.1 179 9.3 911 10.6 3.1 9.9 2.1 16.4 2.5 7.3
50 - 99 lbs 2,725 10.1 99 1.9 53 2.8 543 18.5 1.4 29.5 1.4 17.1 1.1 12.3
100 - 499 lbs 3,987 14.8 164 3.2 108 5.7 620 13.9 1.9 15.6 1.4 7.8 1.6 10.8
500 - 749 lbs 328 1.2 26 0.5 16 0.8 599 18 0.2 13.8 0.4 15.1 0.3 5.4
750 - 999 lbs 18 0.1 4 0.1 4 0.2 983 38.1 - 21.1 0.1 41 0.2 31.1
1,000 - 9,999 lbs S S S S S S S S S S S S S S
10,000 - 49,999 lbs 607 2.3 461 9 428 22.3 973 19.6 0.5 29.2 5.3 32.2 4.5 41.1
50,000 - 99,999 lbs 78 0.3 320 6.2 89 4.6 264 44.8 0.2 23.3 5.9 37.6 2.8 24.4
More than 100,000 lbs S S S S 976 50.9 372 S S S S 31.1 7.8 12.7

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 24,584 100 498 100 357 100 890 9.7 - 10.4 - 10 - 7.6
Less than 50 lbs 17,542 71.4 209 41.9 179 50 911 10.6 2.3 9.9 4 16.4 4.1 7.3
50 - 99 lbs 2,725 11.1 99 19.8 53 14.9 543 18.5 1.6 29.5 3 17.1 2.3 12.3
100 - 499 lbs 3,980 16.2 162 32.6 107 30.1 618 14 2 15.7 2.5 7.9 2.5 10.9
500 - 749 lbs 321 1.3 25 5 15 4.1 585 18.7 0.3 14.1 0.9 17.9 0.8 9.7
750 - 999 lbs 16 0.1 3 0.7 S S 909 43.9 - 25.1 0.2 S S 34.6
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 593 100 2,255 100 1,151 100 869 19.4 - 26.8 - 25.2 - 14.7
Less than 50 lbs S S S S S S S S S S S S S S
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs 5 0.9 1 0.1 S S S 40 3.2 11.2 0.7 S S S
500 - 749 lbs 2 0.4 1 - - - 289 36.4 1.1 10.6 0.4 37.2 0.1 27.2
750 - 999 lbs S S S S S S S S S 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 363 61.2 208 9.2 374 32.5 1,946 21.6 5.9 39.2 4.3 37.7 6.4 14.8
50,000 - 99,999 lbs S S 191 8.5 78 6.7 404 S S 38.5 6.7 38.6 5.2 8.6
More than 100,000 lbs 177 29.8 1,836 81.4 681 59.2 384 23.9 7 30.6 5.7 31.1 7.2 12.9

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 S S S S S S S 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 S S S S S S S S S S S S S S
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S S S S S 4,108 S S S S S S 36.2
10,000 - 49,999 lbs S S S S 53 13.4 S S S S S 33.6 17.9 S
50,000 - 99,999 lbs S S S S S S 77 S S S S S S 14.2
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 S S S S S S S S S S S S S 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 - - - - - - - - - - - - - -
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 S S 39 100 5 100 134 S S 26.4 - 10.1 - 16.5
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 S S S S S S S S S S S 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 5,146 100 1,766 100 723 100 42 11.4 - 38.1 - 28 - 33.8
Less than 50 lbs 562 10.9 21 1.2 - 0.1 27 20.5 2 29.2 0.4 42 - 25
50 - 99 lbs 170 3.3 18 1 - - S 20.7 0.6 29.5 0.3 28.8 0.1 S
100 - 499 lbs 453 8.8 75 4.2 3 0.4 31 17.4 2 23.2 1.4 32.6 0.3 43
500 - 749 lbs 115 2.2 35 2 1 0.1 S 35.8 1.7 46.3 2.6 36.5 0.2 S
750 - 999 lbs 31 0.6 9 0.5 1 0.1 S 30 0.3 26.7 0.3 41.5 0.1 S
1,000 - 9,999 lbs 2,295 44.6 309 17.5 90 12.4 281 27.2 7.2 24.8 8.7 30.1 9.9 28.7
10,000 - 49,999 lbs 1,331 25.9 498 28.2 317 43.9 613 17.6 4.8 19.4 7.2 23.6 10.9 21.6
50,000 - 99,999 lbs 52 1 178 10.1 S S 686 29.3 0.6 27.9 5 S S 40.5
More than 100,000 lbs S S S S S S 766 S S S S S S 30.2

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.