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

Tuesday, July 3, 2012

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.

Excel | CSV

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 82,931 100 152,871 100 46,890 100 560 5.1 - 10.8 - 11.9 - 9.2
Less than 50 lbs 6,716 8.1 185 0.1 133 0.3 773 16.6 1.1 20.8 - 26.5 - 6.3
50 - 99 lbs 1,605 1.9 152 0.1 80 0.2 519 10.4 0.1 15.3 - 14.6 - 7.8
100 - 499 lbs 5,251 6.3 894 0.6 194 0.4 240 9.8 0.4 15.5 0.1 11.3 0.1 20.5
500 - 749 lbs 1,745 2.1 504 0.3 110 0.2 223 13.8 0.2 16.4 0.1 29.4 0.1 23.3
750 - 999 lbs 1,340 1.6 444 0.3 62 0.1 142 7.4 0.1 11.6 - 14.9 - 14.0
1,000 - 9,999 lbs 14,863 17.9 7,439 4.9 1,141 2.4 150 11.5 1.8 16.1 0.8 10.5 0.3 10.4
10,000 - 49,999 lbs 40,428 48.7 61,631 40.3 12,391 26.4 200 4.4 2.3 14.6 4.3 6.9 4.1 15.8
50,000 - 99,999 lbs 5,269 6.4 34,948 22.9 2,771 5.9 80 32.1 1.6 26.7 4.1 14.7 1.2 18.5
More than 100,000 lbs 5,712 6.9 46,674 30.5 30,009 64.0 506 19.4 1.2 12.5 4.2 18.7 5.3 12.4

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 73,828 100 138,876 100 41,699 100 168 4.6 - 11.6 - 13.3 - 13.5
Less than 50 lbs 2,666 3.6 45 - 10 - 221 25.9 0.9 17.5 - 43.7 - 33.6
50 - 99 lbs 592 0.8 69 - 9 - 121 14.1 0.1 26.1 - 10.3 - 27.0
100 - 499 lbs 4,121 5.6 794 0.6 118 0.3 136 9.0 0.4 17.6 0.1 8.2 - 19.3
500 - 749 lbs 1,658 2.2 496 0.4 107 0.3 220 14.1 0.3 16.4 0.1 30.0 0.1 23.8
750 - 999 lbs 1,322 1.8 440 0.3 62 0.1 141 7.3 0.1 11.6 0.1 14.8 - 14.1
1,000 - 9,999 lbs 14,666 19.9 7,366 5.3 1,115 2.7 148 11.5 1.9 16.0 1.2 10.3 0.4 10.3
10,000 - 49,999 lbs 39,124 53.0 57,937 41.7 11,555 27.7 198 4.7 1.9 15.8 4.2 6.9 4.4 15.0
50,000 - 99,999 lbs 4,406 6.0 31,646 22.8 2,483 6.0 80 24.7 1.5 24.4 3.8 14.6 1.4 21.0
More than 100,000 lbs 5,273 7.1 40,082 28.9 26,241 62.9 501 21.9 1.4 15.6 4.4 22.0 5.7 12.3

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 68,854 100 101,323 100 15,617 100 158 4.7 - 15.0 - 6.1 - 11.7
Less than 50 lbs 2,649 3.8 44 - 9 0.1 191 26.1 0.9 17.6 - 39.7 - 33.0
50 - 99 lbs 580 0.8 69 0.1 9 0.1 120 14.4 0.1 26.1 - 10.6 - 27.2
100 - 499 lbs 4,055 5.9 792 0.8 115 0.7 133 8.9 0.4 17.5 0.2 8.7 - 19.9
500 - 749 lbs 1,637 2.4 495 0.5 106 0.7 218 13.3 0.3 16.4 0.1 29.6 0.2 23.7
750 - 999 lbs 1,322 1.9 440 0.4 61 0.4 141 7.3 0.1 11.7 0.1 14.7 0.1 14.1
1,000 - 9,999 lbs 14,621 21.2 7,363 7.3 1,110 7.1 147 11.5 1.8 16.0 1.6 10.4 0.6 10.2
10,000 - 49,999 lbs 38,713 56.2 57,668 56.9 11,433 73.2 197 4.4 2.2 15.9 3.8 6.7 2.3 15.1
50,000 - 99,999 lbs 4,131 6.0 31,155 30.7 2,423 15.5 79 25.5 1.5 24.8 5.1 14.1 2.2 21.1
More than 100,000 lbs S S 3,297 3.3 351 2.2 S S S 31.2 1.2 34.3 0.8 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 38,592 100 35,273 100 10,233 100 418 5.1 - 14.1 - 5.6 - 11.6
Less than 50 lbs 1,977 5.1 11 - S S 483 31.8 1.6 33.0 - S S 16.7
50 - 99 lbs 152 0.4 10 - 5 - 472 12.3 - 23.4 - 20.1 - 18.0
100 - 499 lbs 1,750 4.5 188 0.5 76 0.7 345 13.4 0.5 32.2 0.3 16.1 0.1 28.6
500 - 749 lbs 657 1.7 79 0.2 45 0.4 570 13.9 0.2 19.3 0.1 23.9 0.1 9.5
750 - 999 lbs 626 1.6 74 0.2 41 0.4 554 17.0 0.3 17.7 0.1 20.3 0.1 6.3
1,000 - 9,999 lbs 7,207 18.7 1,287 3.6 719 7.0 561 12.8 1.7 9.6 0.6 10.9 0.9 7.1
10,000 - 49,999 lbs 24,404 63.2 22,959 65.1 7,757 75.8 356 5.8 2.5 18.5 4.5 5.5 2.4 13.1
50,000 - 99,999 lbs 1,671 4.3 10,258 29.1 1,374 13.4 135 22.4 1.0 19.4 4.8 23.1 2.7 10.1
More than 100,000 lbs 147 0.4 407 1.2 S S 448 33.7 0.2 38.9 1.1 S S 23.4

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 30,262 100 66,050 100 5,384 100 72 7.3 - 20.8 - 14.9 - 8.9
Less than 50 lbs 671 2.2 34 0.1 2 - 60 26.8 0.5 22.5 - 16.0 - 20.5
50 - 99 lbs 428 1.4 59 0.1 4 0.1 65 18.6 0.2 27.5 - 15.9 - 20.3
100 - 499 lbs 2,305 7.6 604 0.9 40 0.7 64 9.5 0.8 16.0 0.4 13.3 0.2 22.1
500 - 749 lbs 979 3.2 416 0.6 S S 151 20.9 0.6 18.5 0.2 S S 38.8
750 - 999 lbs 696 2.3 366 0.6 20 0.4 55 15.7 0.5 12.4 0.2 12.4 0.1 15.4
1,000 - 9,999 lbs 7,415 24.5 6,076 9.2 391 7.3 61 13.3 3.6 18.1 2.5 15.1 1.6 16.1
10,000 - 49,999 lbs 14,309 47.3 34,709 52.5 3,676 68.3 100 12.3 3.8 22.1 3.6 18.4 3.8 17.7
50,000 - 99,999 lbs 2,460 8.1 20,897 31.6 1,048 19.5 51 28.9 2.2 32.2 5.7 21.2 3.5 39.0
More than 100,000 lbs S S 2,889 4.4 141 2.6 S S S 35.9 2.0 24.9 0.6 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 2,054 100 10,718 100 6,262 100 614 23.1 - 26.8 - 37.8 - 10.8
Less than 50 lbs S S S S S S S S S S S S S S
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - 3 5.2 - 13.0 - 13.0 - -
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 9 0.4 2 - 2 - 1,235 30.3 0.7 14.4 - 10.8 0.1 16.0
10,000 - 49,999 lbs S S S S S S 558 S S S S S S 45.5
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 1,665 81.1 10,345 96.5 6,090 97.3 647 25.7 7.2 27.3 2.1 39.1 2.8 11.9

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 2,462 100 26,440 100 19,801 100 728 22.3 - 21.6 - 24.2 - 7.0
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 2,462 100.0 26,440 100.0 19,801 100.0 728 22.3 - 21.6 - 24.2 - 7.0

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 2,462 100 26,440 100 19,801 100 728 22.3 - 21.6 - 24.2 - 7.0
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 2,462 100.0 26,440 100.0 19,801 100.0 728 22.3 - 21.6 - 24.2 - 7.0

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 154 100 6 100 8 100 1,577 37.2 - 43.4 - 44.2 - 11.1
Less than 50 lbs 18 11.4 S S S S 1,643 32.4 13.3 S S S S 12.0
50 - 99 lbs 12 7.5 - 1.4 - 1.3 1,267 41.9 11.5 21.7 4.8 30.6 4.1 17.8
100 - 499 lbs 66 42.9 S S S S 1,243 37.8 7.0 S S S S 9.8
500 - 749 lbs S S S S S S 1,286 S S S S S S 16.6
750 - 999 lbs S S S S S S S S S S S S S S
1,000 - 9,999 lbs 36 23.1 2 29.8 3 36.0 1,638 35.0 6.3 23.5 11.5 36.6 11.1 15.8
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 - - - - - - - - - - - - - -

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 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 - - - - - - - - - - - - - -

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 8,290 100 9,762 100 4,954 100 908 23.0 - 37.4 - 28.0 - 2.2
Less than 50 lbs 3,910 47.2 135 1.4 122 2.5 912 23.9 3.8 25.3 1.4 25.3 1.2 2.3
50 - 99 lbs 966 11.7 78 0.8 71 1.4 894 16.3 0.9 17.5 0.9 16.4 1.0 6.0
100 - 499 lbs 1,081 13.0 90 0.9 75 1.5 898 22.4 1.9 18.2 1.1 21.8 1.0 7.6
500 - 749 lbs 80 1.0 5 0.1 3 0.1 589 47.3 0.5 37.4 0.1 36.6 0.1 17.5
750 - 999 lbs 9 0.1 1 - 1 - 589 44.9 0.1 35.2 - 36.2 - 16.4
1,000 - 9,999 lbs 47 0.6 11 0.1 15 0.3 1,248 33.6 0.4 29.9 0.1 33.1 0.1 10.4
10,000 - 49,999 lbs 1,018 12.3 422 4.3 764 15.4 1,748 18.3 3.1 14.1 8.1 17.5 10.6 8.4
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 392 4.7 6,250 64.0 3,697 74.6 542 31.9 2.6 43.2 10.4 39.3 12.3 20.3

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 6,032 100 308 100 271 100 909 20.3 - 19.6 - 19.2 - 2.2
Less than 50 lbs 3,907 64.8 134 43.5 122 45.1 911 23.9 3.1 25.1 3.3 25.2 3.9 2.3
50 - 99 lbs 965 16.0 78 25.2 71 26.1 894 16.3 1.4 17.5 1.6 16.4 2.3 6.0
100 - 499 lbs 1,073 17.8 90 29.3 75 27.5 897 22.6 2.7 18.2 2.4 22.0 2.8 7.7
500 - 749 lbs 79 1.3 5 1.7 3 1.1 586 48.1 0.6 37.3 0.6 36.3 0.5 17.6
750 - 999 lbs 9 0.1 1 0.3 1 0.2 568 44.6 0.1 37.7 0.4 35.7 0.3 16.6
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-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 2,092 100 S S 1,432 100 631 34.5 - S S 19.8 - 44.1
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 S S S 22.1 - 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 S S S S S S S S S S S S S S
1,000 - 9,999 lbs 40 1.9 11 0.3 14 1.0 1,206 30.0 1.8 28.7 1.3 33.7 1.4 11.1
10,000 - 49,999 lbs 912 43.6 402 9.2 710 49.5 1,711 20.4 11.0 13.9 12.4 16.7 7.8 8.0
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 343 16.4 1,201 27.4 502 35.0 507 33.0 10.7 38.7 14.4 34.3 7.9 34.2

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 114 100 S S S S S 38.5 - S S S S S
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs S S - - - - 1,548 S S 26.1 0.7 26.9 1.0 0.9
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs - - - - - - - - - - - - - -
10,000 - 49,999 lbs 88 76.9 S S S S 3,009 46.8 11.1 S S S S 44.4
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs S S S S 2,131 97.7 566 S S S S 43.0 1.4 24.5

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 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 - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

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 S S S S S S S S S S S S S S
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 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 813 100 S S 238 100 S 31.0 - S S 37.1 - S
Less than 50 lbs S S 5 0.1 S S S S S 42.4 0.4 S S S
50 - 99 lbs 48 5.9 4 0.1 - 0.1 27 40.0 4.2 32.1 0.8 35.4 0.3 15.8
100 - 499 lbs 49 6.0 10 0.2 1 0.2 S 33.8 2.1 33.6 0.7 28.8 0.2 S
500 - 749 lbs 7 0.8 S S S S S 31.7 1.4 S S S S S
750 - 999 lbs S S 2 0.1 S S S S S 49.9 0.6 S S S
1,000 - 9,999 lbs 150 18.4 61 1.4 11 4.8 201 36.3 6.7 35.2 10.3 22.2 11.4 45.8
10,000 - 49,999 lbs S S S S S S S S S S S S S S
50,000 - 99,999 lbs 77 9.5 S S 81 34.2 152 45.0 13.0 S S 40.4 12.7 36.3
More than 100,000 lbs S S S S 70 29.6 583 S S S S 47.5 13.6 44.1

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.