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 198,781 100 328,463 100 68,185 100 275 6.5 - 11.6 - 7.1 - 18.9
Less than 50 lbs 9,038 4.5 269 0.1 88 0.1 299 15.7 0.7 18.9 - 21.9 - 31.1
50 - 99 lbs 3,029 1.5 179 0.1 41 0.1 229 18.8 0.3 16.1 - 14.1 - 16.2
100 - 499 lbs 8,555 4.3 1,306 0.4 258 0.4 202 14.5 0.5 14.9 - 12.8 0.1 10.7
500 - 749 lbs 3,729 1.9 579 0.2 147 0.2 247 13.5 0.2 11.5 - 16.1 - 16.3
750 - 999 lbs 2,699 1.4 632 0.2 146 0.2 226 7.5 0.1 10.4 - 16.0 - 20.0
1,000 - 9,999 lbs 31,024 15.6 14,191 4.3 3,605 5.3 266 6.9 1.3 10.3 0.6 14.5 1.0 21.3
10,000 - 49,999 lbs 84,039 42.3 105,683 32.2 26,331 38.6 238 8.1 2.3 11.3 3.1 9.4 3.4 12.4
50,000 - 99,999 lbs 23,625 11.9 75,757 23.1 6,963 10.2 91 22.0 1.9 12.0 3.2 19.9 2.1 12.1
More than 100,000 lbs 33,043 16.6 129,868 39.5 30,607 44.9 500 9.9 1.3 21.8 4.1 14.2 3.5 11.0

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 182,029 100 296,771 100 60,232 100 108 7.1 - 13.2 - 8.7 - 27.1
Less than 50 lbs 3,616 2.0 179 0.1 15 - S 16.3 0.3 21.7 - 14.6 - S
50 - 99 lbs 1,570 0.9 144 - 15 - 103 17.3 0.1 18.3 - 17.7 - 16.8
100 - 499 lbs 7,260 4.0 1,218 0.4 201 0.3 161 17.2 0.5 15.5 - 15.1 - 11.7
500 - 749 lbs 3,135 1.7 531 0.2 124 0.2 228 11.2 0.2 12.1 - 13.0 - 15.7
750 - 999 lbs 2,613 1.4 610 0.2 143 0.2 229 7.6 0.1 10.5 - 16.2 - 21.5
1,000 - 9,999 lbs 30,053 16.5 13,771 4.6 3,424 5.7 267 6.9 1.4 9.9 0.5 14.6 1.2 20.9
10,000 - 49,999 lbs 82,692 45.4 102,197 34.4 25,445 42.2 236 8.1 2.2 11.9 3.5 9.6 4.2 12.5
50,000 - 99,999 lbs 23,510 12.9 73,812 24.9 6,863 11.4 93 22.1 2.1 12.1 3.4 20.0 2.4 12.3
More than 100,000 lbs 27,580 15.2 104,310 35.1 24,002 39.8 451 11.5 1.5 27.5 4.4 20.0 4.3 14.2

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 156,639 100 219,265 100 39,308 100 104 7.5 - 8.1 - 10.3 - 27.2
Less than 50 lbs 3,462 2.2 178 0.1 14 - S 17.5 0.4 21.7 - 14.8 - S
50 - 99 lbs 1,537 1.0 144 0.1 15 - 99 18.1 0.2 18.3 - 18.8 - 15.7
100 - 499 lbs 7,178 4.6 1,216 0.6 198 0.5 158 17.6 0.6 15.5 0.1 15.6 0.1 11.8
500 - 749 lbs 3,111 2.0 529 0.2 122 0.3 226 11.4 0.2 12.2 - 12.9 0.1 15.7
750 - 999 lbs 2,568 1.6 607 0.3 140 0.4 225 7.0 0.1 10.6 - 16.4 0.1 21.7
1,000 - 9,999 lbs 29,344 18.7 13,754 6.3 3,377 8.6 261 5.6 1.4 9.9 0.5 14.0 1.5 20.2
10,000 - 49,999 lbs 82,140 52.4 101,882 46.5 25,135 63.9 235 8.2 2.7 12.0 4.1 9.9 4.7 12.5
50,000 - 99,999 lbs 23,271 14.9 73,503 33.5 6,666 17.0 91 22.2 2.3 12.1 3.3 20.9 3.2 12.9
More than 100,000 lbs 4,029 2.6 27,451 12.5 S S S 19.2 0.5 24.5 3.0 S S 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 91,055 100 100,135 100 30,897 100 S 9.1 - 12.0 - 11.6 - S
Less than 50 lbs 593 0.7 S S 7 - S 33.0 0.2 S S 20.1 - S
50 - 99 lbs 329 0.4 7 - 6 - 830 26.8 0.1 15.7 - 17.4 - 6.3
100 - 499 lbs 2,889 3.2 140 0.1 124 0.4 886 23.5 0.9 14.0 - 17.3 0.1 6.5
500 - 749 lbs 1,576 1.7 107 0.1 90 0.3 842 21.5 0.4 15.0 - 16.6 0.1 7.7
750 - 999 lbs 1,096 1.2 119 0.1 96 0.3 800 21.7 0.2 20.2 - 27.2 0.1 8.7
1,000 - 9,999 lbs 14,198 15.6 3,380 3.4 2,494 8.1 832 13.1 1.7 13.5 0.5 21.0 2.0 9.8
10,000 - 49,999 lbs 55,811 61.3 52,057 52.0 21,047 68.1 419 10.3 3.2 11.6 3.2 10.3 4.9 10.1
50,000 - 99,999 lbs 12,436 13.7 38,522 38.5 3,918 12.7 103 30.1 2.8 17.1 3.7 20.3 2.3 17.0
More than 100,000 lbs 2,127 2.3 S S S S 585 30.1 1.2 S S S S 13.2

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 65,585 100 119,130 100 8,411 100 61 11.8 - 14.2 - 11.6 - 7.4
Less than 50 lbs 2,869 4.4 139 0.1 7 0.1 41 22.3 0.9 25.0 - 22.7 - 18.1
50 - 99 lbs 1,209 1.8 136 0.1 9 0.1 60 18.3 0.2 19.3 - 27.1 - 11.0
100 - 499 lbs 4,289 6.5 1,076 0.9 74 0.9 67 15.7 0.8 16.8 0.1 20.7 0.1 8.3
500 - 749 lbs 1,535 2.3 422 0.4 33 0.4 77 14.1 0.3 13.6 - 23.3 0.1 21.6
750 - 999 lbs 1,472 2.2 488 0.4 44 0.5 88 10.7 0.3 14.7 0.1 20.7 0.1 21.7
1,000 - 9,999 lbs 15,146 23.1 10,374 8.7 882 10.5 89 10.7 2.0 15.8 1.3 16.5 2.3 15.5
10,000 - 49,999 lbs 26,329 40.1 49,825 41.8 4,088 48.6 80 11.7 2.5 19.6 6.3 14.8 5.6 10.8
50,000 - 99,999 lbs 10,835 16.5 34,981 29.4 2,748 32.7 77 25.4 2.6 17.4 3.7 27.9 5.7 13.1
More than 100,000 lbs 1,902 2.9 21,688 18.2 527 6.3 S 37.5 1.0 32.8 4.8 29.9 3.6 S

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 11,460 100 60,507 100 17,415 100 742 11.2 - 49.8 - 23.9 - 13.0
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 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 1,921 S S S S S S 28.8
10,000 - 49,999 lbs 532 4.6 289 0.5 308 1.8 1,035 28.2 1.0 39.8 0.9 37.0 1.3 13.4
50,000 - 99,999 lbs 196 1.7 240 0.4 S S 741 21.6 0.6 26.4 0.9 S S 38.6
More than 100,000 lbs 10,709 93.4 S S 16,904 97.1 696 10.5 1.1 S S 24.5 1.4 13.1

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 - - - - - - - - - - - - - -
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 14 100 S S 1,949 S S 38.4 - S S 14.4
Less than 50 lbs 154 15.0 - 2.6 1 1.7 1,851 31.5 14.3 35.3 2.8 40.2 3.2 7.1
50 - 99 lbs 32 3.1 - 2.3 1 1.4 1,733 30.5 6.1 34.7 4.2 45.1 4.3 19.6
100 - 499 lbs 82 8.0 1 10.8 3 7.5 1,979 25.6 7.4 23.3 14.7 26.9 16.8 6.8
500 - 749 lbs 25 2.4 S S S S 651 42.2 7.6 S S S S 49.9
750 - 999 lbs S S S S S S 1,239 S S S S S S 9.5
1,000 - 9,999 lbs S S S S S S 4,246 S S S S S S 28.2
10,000 - 49,999 lbs - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

Pipeline5

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 12,432 100 16,668 100 S S S 18.1 - 17.9 - 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 S S S S S S S S S S S S S S
More than 100,000 lbs 12,368 99.5 16,573 99.4 S S S 18.2 0.3 18.1 0.4 S S S

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 14,098 100 12,201 100 7,208 100 848 16.0 - 23.3 - 17.8 - 9.3
Less than 50 lbs 5,249 37.2 80 0.7 73 1.0 846 20.7 5.2 22.7 0.3 25.3 0.3 9.8
50 - 99 lbs 1,417 10.1 29 0.2 25 0.3 873 42.4 2.8 15.5 0.1 20.4 0.1 9.0
100 - 499 lbs 1,213 8.6 68 0.6 57 0.8 829 27.9 2.8 21.1 0.4 25.2 0.7 9.6
500 - 749 lbs S S S S S S 769 S S S S S S 16.6
750 - 999 lbs S S S S 2 - 783 S S S S 47.3 0.1 28.9
1,000 - 9,999 lbs 100 0.7 24 0.2 S S 2,658 32.2 0.2 36.5 0.2 S S 27.8
10,000 - 49,999 lbs 618 4.4 405 3.3 549 7.6 1,367 28.1 1.6 31.6 1.0 40.6 2.0 13.2
50,000 - 99,999 lbs 30 0.2 26 0.2 43 0.6 1,612 26.7 0.2 30.7 0.5 43.0 0.7 28.1
More than 100,000 lbs 4,870 34.5 11,538 94.6 6,370 88.4 968 29.7 7.0 24.4 1.9 19.2 2.4 9.4

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 8,364 100 208 100 179 100 846 19.3 - 18.5 - 21.7 - 9.4
Less than 50 lbs 5,233 62.6 80 38.7 73 41.0 846 20.8 5.5 22.7 6.0 25.4 5.6 9.9
50 - 99 lbs 1,408 16.8 29 13.9 25 14.0 872 42.7 3.3 15.5 2.2 20.5 2.3 9.0
100 - 499 lbs 1,210 14.5 68 32.5 57 31.7 830 27.9 3.1 21.1 4.4 25.2 4.7 9.7
500 - 749 lbs S S S S S S 757 S S S S S S 16.3
750 - 999 lbs S S S S S S 769 S S S S S S 27.7
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 3,251 100 3,622 100 3,883 100 1,183 23.8 - 25.5 - 25.5 - 10.5
Less than 50 lbs S S - - - - 1,671 S S 19.5 - 14.7 - 9.0
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 1,302 S S S S S S 32.8
750 - 999 lbs S S S S S S S S S S S S S S
1,000 - 9,999 lbs 40 1.2 S S S S 1,373 44.8 1.4 S S S S 20.0
10,000 - 49,999 lbs 503 15.5 345 9.5 441 11.4 1,318 34.5 7.4 36.3 5.3 49.9 5.6 13.9
50,000 - 99,999 lbs 22 0.7 19 0.5 S S 1,391 24.6 0.9 39.7 1.6 S S 30.1
More than 100,000 lbs 2,572 79.1 3,249 89.7 3,401 87.6 1,048 27.9 8.9 28.4 5.6 27.0 5.9 10.6

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 327 100 5,348 100 1,518 100 2,398 41.7 - 48.0 - 38.6 - 31.0
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 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 3,797 S S S S S S 38.2
10,000 - 49,999 lbs 107 32.7 S S S S 1,617 29.6 19.2 S S S S 40.0
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 5,272 98.6 1,349 88.8 S S S 29.3 1.1 20.6 5.2 S

Rail 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 689 100 1,392 100 1,319 100 952 26.1 - 30.3 - 48.2 - 24.5
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 S S S S S S S S S S S S S S
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 688 99.9 1,389 99.7 1,316 99.8 972 26.2 0.4 30.4 0.5 48.3 0.3 25.1

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 S S S S S S S S S S S S S S
10,000 - 49,999 lbs 7 0.5 3 0.2 S S S 10.0 5.0 28.5 2.0 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 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 2,654 100 19,491 100 745 100 S 16.3 - 45.2 - 20.4 - S
Less than 50 lbs 174 6.5 10 - - - S 41.9 3.8 43.1 0.2 35.6 - S
50 - 99 lbs 42 1.6 6 - - - S 38.6 0.9 41.2 0.2 30.0 - S
100 - 499 lbs 82 3.1 21 0.1 1 0.1 30 29.8 0.7 34.3 0.3 32.0 - 37.8
500 - 749 lbs S S 19 0.1 1 0.1 27 S S 34.9 0.4 40.1 - 23.5
750 - 999 lbs 28 1.0 S S S S S 47.9 1.0 S S S S S
1,000 - 9,999 lbs 870 32.8 395 2.0 114 15.3 S 27.9 6.9 37.5 4.3 31.2 3.7 S
10,000 - 49,999 lbs 729 27.5 3,081 15.8 337 45.2 S 28.0 5.8 43.7 12.0 20.7 7.5 S
50,000 - 99,999 lbs 86 3.3 1,919 9.8 57 7.7 S 35.4 2.1 42.4 6.9 27.6 4.4 S
More than 100,000 lbs 593 22.3 S S 235 31.6 S 42.5 11.0 S S 39.6 13.3 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.