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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 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 84,458 100 67,372 100 13,136 100 511 10.3 - 11.9 - 13.6 - 9.9
Less than 50 lbs 7,480 8.9 175 0.3 109 0.8 671 14.7 1.6 12.2 0.1 19.7 0.2 10.3
50 - 99 lbs 2,556 3.0 121 0.2 41 0.3 352 18.9 0.2 10.9 - 12.9 0.1 15.9
100 - 499 lbs 7,689 9.1 742 1.1 153 1.2 213 37.8 1.8 19.6 0.3 11.4 0.3 19.5
500 - 749 lbs 2,572 3.0 351 0.5 72 0.5 204 35.4 0.6 15.9 0.1 20.9 0.1 18.0
750 - 999 lbs 1,865 2.2 252 0.4 52 0.4 204 21.1 0.3 7.4 0.1 12.7 0.1 8.7
1,000 - 9,999 lbs 21,930 26.0 4,958 7.4 969 7.4 214 20.9 2.4 21.0 1.0 15.5 1.6 16.7
10,000 - 49,999 lbs 31,751 37.6 37,105 55.1 6,052 46.1 163 11.5 3.6 11.0 2.5 10.9 4.0 9.5
50,000 - 99,999 lbs 4,541 5.4 12,988 19.3 900 6.9 67 19.4 1.4 25.3 2.8 22.4 1.7 16.3
More than 100,000 lbs 4,076 4.8 10,679 15.9 4,788 36.4 386 30.4 1.9 23.7 3.2 28.1 5.9 10.7

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 74,482 100 63,815 100 10,125 100 160 11.8 - 11.7 - 11.0 - 11.4
Less than 50 lbs 2,301 3.1 47 0.1 7 0.1 146 28.7 0.9 10.5 - 23.6 - 19.3
50 - 99 lbs 1,347 1.8 72 0.1 9 0.1 131 25.9 0.2 17.5 - 14.0 - 17.3
100 - 499 lbs 6,371 8.6 672 1.1 113 1.1 161 44.1 1.9 21.6 0.3 13.5 0.2 16.5
500 - 749 lbs 2,387 3.2 334 0.5 57 0.6 169 36.4 0.6 16.6 0.1 21.3 0.1 10.1
750 - 999 lbs 1,849 2.5 249 0.4 51 0.5 202 21.2 0.3 7.6 0.1 13.4 0.1 9.4
1,000 - 9,999 lbs 21,688 29.1 4,894 7.7 933 9.2 208 21.2 2.4 21.4 1.1 16.3 1.6 17.1
10,000 - 49,999 lbs 31,093 41.7 36,089 56.6 5,743 56.7 160 11.6 4.1 11.5 2.6 11.5 3.0 9.7
50,000 - 99,999 lbs 4,535 6.1 12,948 20.3 838 8.3 64 19.5 1.7 25.3 3.0 21.9 2.0 17.2
More than 100,000 lbs 2,911 3.9 8,510 13.3 2,373 23.4 256 29.9 1.6 25.0 3.2 25.2 4.3 13.6

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 70,044 100 57,740 100 7,454 100 149 13.1 - 13.0 - 10.8 - 11.8
Less than 50 lbs 1,883 2.7 46 0.1 6 0.1 115 29.9 0.7 10.6 - 26.9 - 23.7
50 - 99 lbs 1,261 1.8 71 0.1 9 0.1 125 28.0 0.2 17.6 - 14.1 - 17.9
100 - 499 lbs 6,162 8.8 669 1.2 110 1.5 156 44.0 1.9 21.5 0.4 12.6 0.2 17.5
500 - 749 lbs 2,363 3.4 333 0.6 55 0.7 165 36.2 0.6 16.5 0.1 20.4 0.1 10.4
750 - 999 lbs 1,816 2.6 248 0.4 46 0.6 186 21.8 0.3 7.5 0.1 12.6 0.1 10.1
1,000 - 9,999 lbs 21,589 30.8 4,881 8.5 921 12.4 205 21.2 2.1 21.5 1.1 16.1 1.5 17.0
10,000 - 49,999 lbs 30,466 43.5 35,441 61.4 5,562 74.6 158 12.1 4.2 12.0 2.6 12.2 2.9 9.7
50,000 - 99,999 lbs 3,765 5.4 11,768 20.4 510 6.8 44 18.3 1.5 28.2 2.9 23.2 1.6 13.6
More than 100,000 lbs S S 4,284 7.4 235 3.2 87 S S 28.1 2.4 34.7 0.9 33.9

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 36,928 100 28,319 100 5,694 100 479 13.7 - 15.1 - 10.9 - 6.6
Less than 50 lbs 441 1.2 7 - 5 0.1 547 30.8 0.9 21.7 - 33.4 - 19.1
50 - 99 lbs 259 0.7 10 - 6 0.1 620 37.6 0.1 15.5 - 19.9 - 15.9
100 - 499 lbs 1,809 4.9 136 0.5 87 1.5 646 17.8 0.7 12.1 0.1 14.1 0.2 4.7
500 - 749 lbs 941 2.5 89 0.3 44 0.8 495 21.3 0.4 16.7 0.1 26.5 0.1 11.2
750 - 999 lbs 779 2.1 76 0.3 38 0.7 504 16.6 0.4 9.7 0.1 15.9 0.1 7.9
1,000 - 9,999 lbs 12,782 34.6 1,550 5.5 724 12.7 496 29.9 4.7 13.9 1.4 20.6 2.0 6.5
10,000 - 49,999 lbs 17,669 47.8 17,222 60.8 4,317 75.8 268 13.0 4.6 12.7 3.2 11.1 3.1 11.0
50,000 - 99,999 lbs 1,585 4.3 5,111 18.0 241 4.2 48 26.6 1.4 25.8 2.6 27.8 1.1 25.5
More than 100,000 lbs S S 4,119 14.5 232 4.1 93 S S 29.1 3.2 34.9 1.7 42.6

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 33,116 100 29,421 100 1,760 100 47 14.6 - 25.6 - 21.9 - 5.1
Less than 50 lbs 1,441 4.4 39 0.1 S S 37 33.8 1.1 10.8 - S S 8.5
50 - 99 lbs 1,002 3.0 61 0.2 3 0.2 44 27.8 0.5 20.2 0.1 21.2 0.1 6.8
100 - 499 lbs S S 533 1.8 23 1.3 42 S S 25.6 0.9 18.4 0.6 11.4
500 - 749 lbs 1,422 4.3 244 0.8 11 0.6 46 49.1 1.0 19.3 0.3 15.9 0.3 16.3
750 - 999 lbs 1,037 3.1 171 0.6 8 0.4 46 35.7 0.8 11.2 0.2 12.9 0.2 12.7
1,000 - 9,999 lbs 8,807 26.6 3,331 11.3 196 11.2 60 19.3 2.5 31.7 1.8 14.9 1.4 12.6
10,000 - 49,999 lbs 12,797 38.6 18,219 61.9 1,246 70.8 79 14.4 5.1 22.8 3.9 25.6 4.7 12.0
50,000 - 99,999 lbs 2,180 6.6 S S 269 15.3 41 33.7 3.0 S S 46.9 4.0 10.8
More than 100,000 lbs S S S S 3 0.1 S S S S S 37.9 0.3 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 3,377 100 4,792 100 1,508 100 S 42.1 - 34.0 - 21.4 - 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 2,542 S S S S S S 2.8
10,000 - 49,999 lbs 625 18.5 647 13.5 181 12.0 S 45.4 9.2 49.8 3.8 41.7 6.2 S
50,000 - 99,999 lbs 763 22.6 1,177 24.6 328 21.7 S 47.4 6.1 43.5 6.7 36.1 7.5 S
More than 100,000 lbs 1,966 58.2 2,967 61.9 997 66.1 357 40.0 10.4 27.7 9.3 19.1 9.0 24.2

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 193 100 1,004 100 1,141 100 1,143 29.1 - 24.8 - 16.2 - 10.0
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 193 100.0 1,004 100.0 1,141 100.0 1,143 29.1 - 24.8 - 16.2 - 10.0

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 193 100 1,004 100 1,141 100 1,143 29.1 - 24.8 - 16.2 - 10.0
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 193 100.0 1,004 100.0 1,141 100.0 1,143 29.1 - 24.8 - 16.2 - 10.0

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 845 100 21 100 21 100 905 32.2 - 30.0 - 25.0 - 20.2
Less than 50 lbs S S 1 4.8 1 4.3 878 S S 20.3 2.8 19.0 2.9 18.9
50 - 99 lbs 86 10.2 1 3.3 1 2.5 783 35.2 4.4 28.8 3.5 42.0 3.4 30.9
100 - 499 lbs 207 24.5 S S S S 918 47.9 8.6 S S S S 12.3
500 - 749 lbs S S 1 5.2 S S 1,326 S S 49.3 7.6 S S 16.4
750 - 999 lbs S S S S S S 3,288 S S S S S S 25.6
1,000 - 9,999 lbs 76 9.0 S S 10 46.0 857 44.7 12.5 S S 47.7 12.6 17.6
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 S S S S S S S S S S S S S S
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

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 9,200 100 2,529 100 2,872 100 796 9.9 - 29.2 - 33.4 - 7.1
Less than 50 lbs 5,072 55.1 126 5.0 102 3.5 808 12.6 3.8 16.6 4.2 21.5 2.5 7.3
50 - 99 lbs 1,197 13.0 48 1.9 32 1.1 681 17.6 1.8 13.5 1.3 17.0 1.0 7.6
100 - 499 lbs 1,228 13.3 66 2.6 40 1.4 616 15.7 1.7 16.3 2.0 20.8 1.5 9.0
500 - 749 lbs 181 2.0 17 0.7 15 0.5 S 28.6 0.5 23.9 0.7 39.7 0.7 S
750 - 999 lbs 12 0.1 3 0.1 S S 406 32.4 0.1 37.9 0.8 S S 23.8
1,000 - 9,999 lbs 29 0.3 4 0.2 5 0.2 1,954 32.4 0.2 31.2 0.3 44.2 0.5 20.2
10,000 - 49,999 lbs 314 3.4 121 4.8 273 9.5 2,159 18.9 0.6 12.7 4.7 25.2 8.8 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 1,164 12.7 2,141 84.7 2,400 83.5 922 47.9 5.0 33.5 9.7 37.9 10.5 18.1

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 7,666 100 258 100 184 100 795 11.6 - 12.9 - 15.9 - 7.1
Less than 50 lbs 5,072 66.2 126 48.7 102 55.5 808 12.6 3.0 16.6 4.2 21.5 6.1 7.3
50 - 99 lbs 1,197 15.6 48 18.5 32 17.2 679 17.6 1.8 13.5 1.3 17.2 2.0 7.8
100 - 499 lbs 1,209 15.8 66 25.4 39 21.3 612 15.4 2.3 16.5 3.3 20.7 4.0 9.0
500 - 749 lbs 178 2.3 16 6.4 10 5.4 609 29.5 0.5 25.8 1.3 48.9 1.6 23.4
750 - 999 lbs 11 0.1 3 1.0 S S 400 29.6 0.2 35.3 1.5 S S 23.9
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 1,009 100 818 100 478 100 875 38.2 - 36.4 - 21.6 - 23.7
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 16 1.6 1 0.1 1 0.2 703 45.0 14.8 22.7 1.5 40.3 0.6 32.6
10,000 - 49,999 lbs 240 23.8 96 11.7 153 32.0 1,563 28.5 12.4 16.9 16.0 24.6 13.7 14.5
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 751 74.5 721 88.2 324 67.8 478 49.1 9.7 36.6 4.9 25.9 9.0 29.3

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 S S S S S S 2,979 S S S S S S 29.2
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 S S S S S S 8,386 S S S S S S 0.2
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S S S S S 2,426 S S S S S S 26.3
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

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 14 100 4 100 S S 5,968 27.7 - 15.4 - S S 38.4
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 14 100.0 4 100.0 S S 5,968 27.7 - 15.4 - S S 38.4
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 263 100 S S 1,504 100 2,887 45.0 - S S 50.0 - 28.8
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 5,882 S S S S S S 24.9
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs 211 80.3 1,035 98.7 1,423 94.6 1,373 41.6 9.8 39.0 0.7 39.0 2.7 1.0

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 776 100 1,028 100 139 100 S 19.0 - 35.4 - 49.7 - S
Less than 50 lbs 107 13.8 2 0.2 - 0.1 S 34.0 7.6 24.5 0.3 50.0 0.3 S
50 - 99 lbs 13 1.6 2 0.2 - - 27 17.1 0.3 26.5 0.1 36.5 - 40.1
100 - 499 lbs S S 4 0.4 - 0.1 S S S 30.7 0.5 41.4 0.2 S
500 - 749 lbs 3 0.4 1 0.1 S S S 35.3 0.6 41.7 0.2 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 213 27.5 59 5.8 S S 533 29.3 8.7 30.5 9.9 S S 20.4
10,000 - 49,999 lbs 344 44.3 895 87.0 35 25.2 S 21.5 11.3 36.7 4.6 23.1 18.8 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

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.