Table 4. Shipment Characteristics by Mode of Transportation and Shipment Size for Metropolitan Area of Origin: 2007

Table 4. Shipment Characteristics by Mode of Transportation and Shipment Size for Metropolitan Area of Origin: 2007

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

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All Modes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 65,562 100 164,751 100 77,302 100 621 5.7 - 6.8 - 15.4 - 11.4
Less than 50 lbs 6,172 9.4 84 0.1 55 0.1 849 21.4 1.7 10.3 - 11.2 - 8.6
50 - 99 lbs 2,005 3.1 59 - 32 - 535 20.7 0.5 13.5 - 14.7 - 12.1
100 - 499 lbs 3,111 4.7 387 0.2 135 0.2 359 11.8 0.5 14.7 - 13.0 0.1 16.4
500 - 749 lbs 1,112 1.7 283 0.2 61 0.1 218 17.3 0.3 21.6 - 14.5 - 30.4
750 - 999 lbs 926 1.4 243 0.1 61 0.1 253 18.0 0.2 18.3 - 30.9 0.1 13.7
1,000 - 9,999 lbs 9,698 14.8 4,593 2.8 1,045 1.4 213 9.2 0.9 12.4 0.3 3.9 0.3 15.0
10,000 - 49,999 lbs 24,297 37.1 38,880 23.6 8,589 11.1 214 7.3 1.7 16.0 2.3 9.6 2.5 19.1
50,000 - 99,999 lbs 6,573 10.0 29,530 17.9 4,203 5.4 134 14.4 1.4 20.6 3.5 29.3 2.2 15.0
More than 100,000 lbs 11,668 17.8 90,691 55.0 63,121 81.7 789 10.0 1.6 8.5 4.8 19.6 4.8 8.8

Single modes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 54,815 100 132,863 100 48,747 100 311 7.3 - 12.9 - 16.7 - 26.6
Less than 50 lbs 1,975 3.6 18 - 4 - 604 42.2 1.2 18.0 - 23.6 - 26.2
50 - 99 lbs 786 1.4 30 - 8 - 268 41.5 0.5 18.1 - 23.3 - 30.4
100 - 499 lbs 2,091 3.8 330 0.2 91 0.2 270 14.1 0.3 17.2 0.1 14.1 0.1 19.9
500 - 749 lbs 958 1.7 266 0.2 53 0.1 203 21.3 0.3 23.3 0.1 17.8 - 34.3
750 - 999 lbs 879 1.6 240 0.2 61 0.1 253 19.4 0.3 18.8 - 31.2 0.1 13.6
1,000 - 9,999 lbs 9,479 17.3 4,510 3.4 1,001 2.1 207 9.3 1.1 13.0 0.6 4.1 0.4 14.6
10,000 - 49,999 lbs 23,570 43.0 38,228 28.8 8,038 16.5 205 7.5 1.9 16.3 2.3 10.1 2.9 19.5
50,000 - 99,999 lbs 6,319 11.5 28,659 21.6 3,957 8.1 129 14.7 1.7 21.1 3.4 31.9 2.5 13.5
More than 100,000 lbs 8,759 16.0 60,582 45.6 35,534 72.9 691 12.2 1.7 15.9 4.1 23.4 5.0 12.5

Truck4

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 44,433 100 74,927 100 13,324 100 204 7.2 - 14.8 - 14.2 - 16.2
Less than 50 lbs 785 1.8 17 - 3 - 158 19.9 0.4 19.4 - 18.2 - 20.0
50 - 99 lbs 398 0.9 28 - 6 - 215 28.9 0.2 20.0 - 18.9 - 26.0
100 - 499 lbs 1,955 4.4 328 0.4 90 0.7 266 13.7 0.3 17.2 0.1 14.5 0.1 20.4
500 - 749 lbs 952 2.1 266 0.4 53 0.4 202 21.3 0.4 23.3 0.1 18.2 0.1 34.5
750 - 999 lbs 841 1.9 240 0.3 60 0.4 251 18.0 0.2 18.8 - 31.5 0.1 13.7
1,000 - 9,999 lbs 9,200 20.7 4,503 6.0 991 7.4 204 9.0 1.4 13.0 1.0 4.2 0.9 15.0
10,000 - 49,999 lbs 23,376 52.6 38,152 50.9 7,944 59.6 203 7.8 2.0 16.3 2.7 10.2 3.6 19.7
50,000 - 99,999 lbs 6,275 14.1 28,619 38.2 3,918 29.4 128 14.6 2.0 21.1 4.3 31.9 5.0 13.4
More than 100,000 lbs 651 1.5 2,774 3.7 260 1.9 S 29.4 0.5 38.3 1.3 34.8 0.9 S

For-hire truck

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 31,489 100 38,037 100 9,862 100 565 9.0 - 21.9 - 10.2 - 10.7
Less than 50 lbs 346 1.1 2 - 2 - 760 41.0 0.6 20.2 - 25.2 - 7.8
50 - 99 lbs 231 0.7 5 - 4 - 836 41.1 0.2 15.9 - 26.6 - 9.8
100 - 499 lbs 1,108 3.5 82 0.2 73 0.7 887 15.5 0.4 13.3 0.1 17.0 0.2 6.0
500 - 749 lbs 533 1.7 47 0.1 41 0.4 868 27.5 0.4 17.1 - 22.2 0.1 7.8
750 - 999 lbs 457 1.5 48 0.1 46 0.5 939 22.6 0.3 24.6 - 33.9 0.1 6.5
1,000 - 9,999 lbs 5,604 17.8 1,144 3.0 786 8.0 714 10.4 1.6 7.4 0.8 6.1 0.9 6.6
10,000 - 49,999 lbs 18,610 59.1 17,228 45.3 6,472 65.6 396 9.9 2.4 20.1 5.2 9.8 3.2 13.6
50,000 - 99,999 lbs 4,378 13.9 18,716 49.2 2,237 22.7 120 20.1 2.2 28.8 5.9 26.8 4.2 7.4
More than 100,000 lbs 222 0.7 764 2.0 202 2.1 231 44.2 0.4 43.9 1.1 45.9 1.2 50.0

Private truck

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 12,944 100 36,890 100 3,462 100 65 12.3 - 16.8 - 49.9 - 16.9
Less than 50 lbs 439 3.4 15 - 1 - 53 28.7 0.8 23.4 - 29.1 - 10.7
50 - 99 lbs 167 1.3 23 0.1 2 - 69 19.8 0.2 24.1 - 27.5 - 18.7
100 - 499 lbs 847 6.5 246 0.7 17 0.5 69 15.2 0.7 20.4 0.2 21.6 0.5 14.7
500 - 749 lbs 419 3.2 219 0.6 12 0.4 56 16.7 0.4 25.9 0.2 28.0 0.3 34.2
750 - 999 lbs 384 3.0 191 0.5 14 0.4 76 22.5 0.6 18.8 0.1 31.8 0.2 28.0
1,000 - 9,999 lbs 3,596 27.8 3,359 9.1 205 5.9 60 13.4 2.4 18.0 1.6 18.4 3.1 25.9
10,000 - 49,999 lbs 4,766 36.8 20,924 56.7 1,473 42.5 68 18.1 3.4 19.1 3.9 42.7 5.0 33.3
50,000 - 99,999 lbs 1,897 14.7 9,903 26.8 S S 145 20.3 2.8 28.7 4.6 S S 19.0
More than 100,000 lbs 429 3.3 S S 57 1.7 54 46.1 1.7 S S 43.3 1.4 30.8

Rail

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 7,986 100 56,565 100 34,527 100 777 12.8 - 17.0 - 23.9 - 12.0
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 1 - - - - - 699 33.4 0.1 27.3 - 16.8 - 5.6
500 - 749 lbs S S S S S S S S S S S S S S
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 1,651 S S S S S S 27.1
10,000 - 49,999 lbs 192 2.4 76 0.1 93 0.3 1,226 29.2 0.9 22.2 0.1 26.5 0.1 15.5
50,000 - 99,999 lbs 44 0.5 40 0.1 39 0.1 961 33.4 0.6 42.4 0.2 35.0 0.1 40.1
More than 100,000 lbs 7,582 94.9 56,444 99.8 34,389 99.6 749 12.5 1.3 17.1 0.1 24.0 0.1 13.0

Water

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 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 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 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

Shallow draft

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 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 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 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 - - - - - - - - - - - - - -

Great Lakes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 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 - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs S S S S S S S S S S S S S S

Deep draft

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 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 - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs S S S S S S S S S S S S S S

Air (incl truck and air)

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total S S 7 100 9 100 1,686 S S 36.0 - 42.0 - 15.7
Less than 50 lbs S S 1 13.7 1 15.2 1,707 S S 36.6 15.1 42.8 15.5 18.3
50 - 99 lbs S S S S S S 1,345 S S S S S S 17.1
100 - 499 lbs S S S S S S 1,285 S S S S S S 16.7
500 - 749 lbs 5 0.2 S S S S 1,366 46.6 1.8 S S S S 21.9
750 - 999 lbs 38 2.0 S S S S 1,053 50.0 19.9 S S S S 20.1
1,000 - 9,999 lbs S S 3 39.2 S S 1,299 S S 49.0 11.9 S S 21.0
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

Multiple modes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 9,314 100 30,027 100 28,253 100 956 10.1 - 28.4 - 30.3 - 7.5
Less than 50 lbs 4,081 43.8 63 0.2 51 0.2 961 15.5 3.9 13.8 1.0 11.9 0.6 7.7
50 - 99 lbs 1,116 12.0 26 0.1 23 0.1 898 19.7 1.9 21.7 0.5 16.5 0.3 9.8
100 - 499 lbs 953 10.2 49 0.2 44 0.2 887 21.8 2.6 12.1 1.1 17.1 0.5 9.7
500 - 749 lbs 114 1.2 12 - 7 - 590 37.7 0.4 38.1 0.3 27.8 0.2 28.6
750 - 999 lbs S S 1 - 1 - S S S 47.2 - 39.8 - S
1,000 - 9,999 lbs 77 0.8 S S 9 - 2,166 37.2 0.6 S S 45.0 0.1 44.1
10,000 - 49,999 lbs 257 2.8 238 0.8 426 1.5 1,770 31.6 1.0 39.5 0.8 39.3 1.3 11.8
50,000 - 99,999 lbs 22 0.2 S S S S 1,419 24.3 0.3 S S S S 36.5
More than 100,000 lbs 2,663 28.6 29,532 98.4 27,546 97.5 1,153 15.9 4.8 28.7 2.9 30.9 1.9 7.6

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

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 6,292 100 150 100 125 100 954 12.6 - 11.6 - 10.1 - 7.6
Less than 50 lbs 4,081 64.9 63 41.6 51 40.7 961 15.5 4.1 13.8 4.4 12.0 4.7 7.7
50 - 99 lbs 1,115 17.7 26 17.3 23 18.7 897 19.7 2.4 21.7 1.7 16.5 1.9 9.8
100 - 499 lbs 950 15.1 49 32.3 43 34.6 886 21.9 3.1 12.1 3.3 17.2 4.2 9.7
500 - 749 lbs 113 1.8 12 8.1 7 5.7 589 37.7 0.6 38.3 2.0 28.0 1.6 34.9
750 - 999 lbs S S 1 0.7 - 0.4 S S S 48.4 0.7 47.1 0.3 S
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-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 1,837 100 10,400 100 7,649 100 1,269 19.8 - 26.6 - 28.8 - 6.1
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 1,331 S S S S S S 15.0
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 S S S S S S S S S S S S S S
1,000 - 9,999 lbs 55 3.0 2 - 2 - 1,481 46.7 6.6 26.8 0.1 24.4 0.1 9.2
10,000 - 49,999 lbs 194 10.6 213 2.1 352 4.6 1,614 34.4 8.4 41.2 4.1 43.9 3.3 13.1
50,000 - 99,999 lbs 22 1.2 S S S S 1,419 24.3 2.6 S S S S 36.5
More than 100,000 lbs 1,564 85.2 10,083 96.9 7,148 93.5 1,169 23.0 7.0 26.8 3.2 30.0 4.4 10.0

Truck and water

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 1,036 100 16,879 100 18,287 100 S 36.1 - 41.4 - 46.3 - 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 S S S S S S S S S S S S S S
10,000 - 49,999 lbs S S 24 0.1 74 0.4 3,187 S S 28.8 5.2 48.0 1.2 18.5
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 949 91.6 16,851 99.8 18,206 99.6 S 34.0 14.2 37.6 3.6 43.3 0.8 S

Other multiple modes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 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 - - - - - - - - - - - - - -
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 and unknown modes

Shipment Weight Value Tons Ton-miles2 Average miles
per shipment
Value Tons Ton-miles Average miles per shipment CV
2007
(million $)
Percent of total 2007
(thousands)
Percent of total 2007
(millions)
Percent of
total
CV3 Standard Error of % CV Standard Error of % CV Standard Error of %
Total 1,433 100 S S S S S 27.5 - S S S S S
Less than 50 lbs 116 8.1 4 0.2 - - 33 41.4 4.4 26.7 0.6 30.9 0.2 34.2
50 - 99 lbs S S 3 0.2 - - 19 S S 24.9 0.5 27.9 0.1 36.0
100 - 499 lbs 67 4.6 9 0.5 - 0.1 34 44.3 3.3 30.3 2.0 43.9 0.9 32.3
500 - 749 lbs 41 2.9 S S - 0.1 S 39.5 4.0 S S 36.8 0.3 S
750 - 999 lbs 15 1.0 2 0.1 - - S 40.0 0.7 43.2 0.9 8.2 0.3 S
1,000 - 9,999 lbs 143 10.0 79 4.2 35 11.7 S 30.0 6.4 34.8 7.8 43.3 11.8 S
10,000 - 49,999 lbs 470 32.8 S S S S 312 41.2 8.1 S S S S 33.9
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 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 Commodity Flow Survey (CFS) geographic areas were drawn from a subset of Combined Statistical Areas (CSAs) and Metropolitan Statistical Areas (MeSAs) as defined by the Office of Management and Budget (OMB). However, CFS metropolitan areas are divided into their state parts when they include more than one state. In addition, the CFS also utilizes a unique geography referred to as, "remainder of state," to represent those areas of a state not contained within a separately published metropolitan area for the CFS (as opposed to not part of any Core-Based Statistical Area (CBSA) as defined by OMB). Because of the differences in the CFS geography, as compared to OMB defined geography, caution should be exercised when comparing CFS estimates to other estimates of similar geography.
2 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
3 Coefficient of Variation.
4 ""Truck"" as a single mode includes any shipment that was made by private truck only, by for-hire truck only, or by a combination of private and for-hire truck.
5 Estimates for pipeline exclude shipments of crude petroleum.

NOTES: 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/
Rows are not shown if all cells for that particular mode have no data. For example, since Denver-Aurora-Boulder by "Water" has no data for any shipment weight group, the entire mode of "Water" for that area was removed from this table. However, if a mode has at least one row of data for one of the shipment weight groups, then the entire mode is shown even though there may be rows absent of data within that mode. For example, Denver-Aurora-Boulder by "Other and unknown modes" has a row absent of data for the shipment size of "More than 100,000 lbs" but does have data for the other shipment weight groups under that mode so it will be shown in its entirety.

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.