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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 77,631 100 119,468 100 34,451 100 248 13.2 - 20.8 - 18.6 - 13.6
Less than 50 lbs 1,182 1.5 31 - 8 - 282 27.0 0.4 20.5 - 30.8 - 20.6
50 - 99 lbs 466 0.6 30 - 6 - 201 26.8 0.2 15.6 - 27.1 - 20.3
100 - 499 lbs 1,704 2.2 221 0.2 29 0.1 158 31.5 0.8 23.1 0.1 22.5 - 13.9
500 - 749 lbs 558 0.7 84 0.1 10 - 120 39.7 0.5 29.1 0.1 40.9 - 9.5
750 - 999 lbs 356 0.5 77 0.1 S S 145 30.3 0.2 25.1 - S S 22.6
1,000 - 9,999 lbs 2,643 3.4 1,228 1.0 S S 365 26.1 1.0 30.0 0.7 S S 23.0
10,000 - 49,999 lbs 18,146 23.4 22,021 18.4 4,982 14.5 216 7.0 5.1 24.8 5.3 13.5 3.9 25.7
50,000 - 99,999 lbs 3,440 4.4 10,420 8.7 732 2.1 65 25.6 0.9 20.0 3.6 22.3 0.9 8.5
More than 100,000 lbs 49,135 63.3 85,357 71.4 28,271 82.1 719 21.2 6.8 27.7 7.6 22.6 4.4 8.3

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 70,488 100 111,477 100 30,009 100 162 14.3 - 20.6 - 21.6 - 17.0
Less than 50 lbs 554 0.8 17 - 2 - 99 20.3 0.2 20.2 - 37.1 - 34.8
50 - 99 lbs 242 0.3 23 - 3 - 132 23.7 0.1 21.5 - 37.4 - 29.1
100 - 499 lbs 1,028 1.5 201 0.2 21 0.1 118 17.1 0.6 25.5 0.1 28.7 - 13.8
500 - 749 lbs 490 0.7 82 0.1 10 - 117 36.0 0.5 29.6 0.1 41.3 - 9.0
750 - 999 lbs 349 0.5 76 0.1 S S 143 30.9 0.2 25.1 0.1 S S 23.8
1,000 - 9,999 lbs 2,491 3.5 1,150 1.0 S S 311 24.7 1.0 26.4 0.6 S S 21.8
10,000 - 49,999 lbs 17,430 24.7 21,662 19.4 4,696 15.6 208 7.1 5.4 24.6 5.4 13.4 3.9 25.9
50,000 - 99,999 lbs 3,413 4.8 10,377 9.3 704 2.3 63 25.9 0.9 20.0 3.7 22.4 1.3 8.9
More than 100,000 lbs 44,492 63.1 77,889 69.9 24,263 80.9 718 22.5 7.0 27.9 7.6 26.0 4.8 11.7

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 26,141 100 34,643 100 6,058 100 143 8.0 - 20.2 - 12.2 - 19.3
Less than 50 lbs 541 2.1 17 - 2 - 94 21.4 0.4 20.5 - 39.0 - 36.8
50 - 99 lbs 228 0.9 23 0.1 3 0.1 130 26.7 0.2 21.2 - 38.4 - 24.7
100 - 499 lbs 1,026 3.9 201 0.6 21 0.3 117 17.2 0.7 25.5 0.2 28.7 0.1 13.9
500 - 749 lbs 490 1.9 82 0.2 10 0.2 117 36.0 0.8 29.6 0.1 41.3 - 9.0
750 - 999 lbs 349 1.3 76 0.2 S S 143 30.9 0.4 25.1 0.1 S S 23.8
1,000 - 9,999 lbs 2,485 9.5 1,144 3.3 S S 312 24.8 1.6 26.6 1.3 S S 21.8
10,000 - 49,999 lbs 17,320 66.3 21,591 62.3 4,683 77.3 208 7.1 2.1 24.6 4.6 13.4 4.2 26.0
50,000 - 99,999 lbs 3,277 12.5 10,160 29.3 599 9.9 57 26.5 2.9 20.2 4.8 22.5 3.0 6.4
More than 100,000 lbs 425 1.6 1,349 3.9 429 7.1 449 29.8 0.7 44.6 1.1 45.6 3.6 30.8

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 15,568 100 22,223 100 5,100 100 351 8.4 - 23.8 - 14.4 - 21.3
Less than 50 lbs 75 0.5 3 - S S 312 40.3 0.2 33.9 - S S 40.4
50 - 99 lbs 55 0.4 4 - 2 - 539 33.6 0.1 36.2 - 48.2 - 23.0
100 - 499 lbs 306 2.0 35 0.2 13 0.3 402 21.2 0.3 49.1 0.1 35.6 0.1 30.1
500 - 749 lbs S S 12 0.1 5 0.1 360 S S 36.3 - 42.7 - 26.9
750 - 999 lbs S S S S S S 571 S S S S S S 20.4
1,000 - 9,999 lbs 1,058 6.8 S S S S 733 41.9 2.0 S S S S 13.8
10,000 - 49,999 lbs 11,522 74.0 15,021 67.6 4,024 78.9 270 6.6 3.7 35.1 6.6 13.7 4.2 32.2
50,000 - 99,999 lbs 1,955 12.6 6,331 28.5 401 7.9 60 32.6 3.7 25.7 6.6 28.3 2.4 12.7
More than 100,000 lbs 233 1.5 375 1.7 388 7.6 950 32.6 0.8 42.8 1.1 48.6 4.8 18.7

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 10,572 100 12,420 100 958 100 49 12.7 - 19.0 - 17.6 - 7.1
Less than 50 lbs 466 4.4 14 0.1 1 0.1 37 23.3 1.1 21.0 0.1 19.2 - 11.6
50 - 99 lbs 173 1.6 19 0.2 1 0.1 43 27.0 0.4 21.8 0.1 24.9 0.1 8.9
100 - 499 lbs 719 6.8 166 1.3 8 0.8 44 21.7 2.1 25.3 1.5 33.2 0.8 9.1
500 - 749 lbs 267 2.5 69 0.6 5 0.5 77 38.8 1.6 31.7 1.0 47.8 0.9 12.2
750 - 999 lbs 208 2.0 62 0.5 3 0.4 55 28.3 0.6 24.0 0.7 25.2 0.2 12.0
1,000 - 9,999 lbs 1,426 13.5 716 5.8 42 4.3 59 18.8 2.2 20.5 0.7 18.5 1.4 16.3
10,000 - 49,999 lbs 5,798 54.8 6,570 52.9 659 68.8 89 14.8 3.6 13.9 6.8 23.4 8.3 17.9
50,000 - 99,999 lbs 1,322 12.5 3,829 30.8 198 20.7 52 32.4 3.8 33.0 5.2 39.3 6.1 13.5
More than 100,000 lbs 192 1.8 S S 41 4.3 S 48.9 1.4 S S 44.2 6.8 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 13,313 100 16,396 100 14,225 100 878 17.5 - 19.5 - 21.5 - 6.5
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 S S 115 0.7 S S 929 S S 38.4 1.0 S S 13.6
More than 100,000 lbs 13,155 98.8 16,227 99.0 14,109 99.2 886 17.9 1.0 19.9 0.8 21.8 0.8 6.7

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 12,921 100 28,494 100 S S S 35.6 - 38.6 - 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 12,898 99.8 28,479 99.9 S S S 35.7 1.2 38.6 1.0 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 9,988 100 24,673 100 2,416 100 S 42.9 - 44.8 - 41.1 - 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 9,966 99.8 24,659 99.9 2,415 100.0 S 43.0 1.1 44.8 1.0 41.1 1.0 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 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

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 S S S S 1,047 S S S S S S 12.5
Less than 50 lbs S S S S S S 1,104 S S S S S S 15.0
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 - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs S S S S S S 1,283 S S S S S S 6.0
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 18,080 100 31,943 100 S S S 38.2 - 32.6 - 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 62 0.3 103 0.3 S S S 41.3 1.8 26.0 0.3 S S S
More than 100,000 lbs 18,014 99.6 31,833 99.7 S S S 38.3 0.9 32.7 0.2 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 6,708 100 7,505 100 4,037 100 542 29.6 - 39.2 - 32.5 - 18.4
Less than 50 lbs 583 8.7 S S 6 0.2 537 40.9 3.9 S S 39.0 0.2 19.3
50 - 99 lbs S S 6 0.1 3 0.1 522 S S 41.6 0.2 35.3 0.1 25.0
100 - 499 lbs S S 16 0.2 8 0.2 561 S S 43.4 0.6 39.5 0.3 36.7
500 - 749 lbs S S 1 - - - 183 S S 45.8 - 34.9 - 42.6
750 - 999 lbs S S - - S S S S S 49.9 - S S S
1,000 - 9,999 lbs S S S S S S 782 S S S S S S 35.4
10,000 - 49,999 lbs 518 7.7 S S 270 6.7 937 41.7 5.3 S S 33.1 9.8 28.1
50,000 - 99,999 lbs 20 0.3 S S 28 0.7 702 41.2 2.1 S S 49.8 8.9 21.1
More than 100,000 lbs 4,628 69.0 7,138 95.1 3,721 92.2 719 39.5 10.8 41.2 6.3 35.4 9.7 14.1

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 S S 36 100 17 100 537 S S 45.0 - 37.4 - 19.3
Less than 50 lbs 583 38.6 S S 6 36.7 537 40.9 8.6 S S 39.0 3.6 19.3
50 - 99 lbs S S 6 15.7 3 15.6 522 S S 41.6 2.6 35.3 2.3 25.0
100 - 499 lbs S S 16 45.3 8 45.2 561 S S 43.5 3.7 39.7 3.1 36.7
500 - 749 lbs S S 1 4.0 - 1.3 157 S S 46.4 2.6 41.2 0.6 42.7
750 - 999 lbs S S S S S S S S S S S S S 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 2,421 100 2,140 100 1,535 100 839 34.6 - 32.8 - 34.9 - 16.9
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs - - - - - - - - - - - - - -
500 - 749 lbs - - - - - - - - - - - - - -
750 - 999 lbs - - - - - - - - - - - - - -
1,000 - 9,999 lbs 2 0.1 S S S S 770 45.2 1.7 S S S S 16.7
10,000 - 49,999 lbs 355 14.6 195 9.1 231 15.1 1,175 31.2 14.3 34.5 13.4 31.0 13.8 13.0
50,000 - 99,999 lbs 19 0.8 40 1.9 28 1.8 706 17.7 6.0 29.9 8.1 12.3 16.0 17.2
More than 100,000 lbs 2,046 84.5 1,904 89.0 1,275 83.1 693 37.1 8.1 34.0 5.2 40.3 7.7 15.5

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 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 S S S S S S S S S S S S S S
1,000 - 9,999 lbs S S - 0.2 - 0.2 801 S S 13.1 4.8 47.9 4.0 48.6
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 S S 121 78.2 S S S S S 14.3 17.5 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 S S 906 100 634 100 794 S S 3.1 - 35.9 - 32.4
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 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 860 94.9 617 97.3 969 S S 8.2 5.0 34.2 2.1 39.3

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 405 S S S S S S 13.2
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 379 S S S S S S 44.7
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 414 S S S S S S 17.4

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 435 100 S S S S 149 37.5 - S S S S 30.5
Less than 50 lbs 45 10.4 1 0.3 - - S 46.1 4.0 30.7 2.8 49.7 5.4 S
50 - 99 lbs 11 2.6 1 0.2 S S S 43.6 5.6 33.5 3.6 S S S
100 - 499 lbs 29 6.6 4 0.7 - 0.1 S 34.7 8.6 24.0 9.4 43.0 8.0 S
500 - 749 lbs S S 1 0.1 S S S S S 21.5 8.4 S S S
750 - 999 lbs 2 0.6 S S S S S 36.8 2.2 S S S S S
1,000 - 9,999 lbs S S S S S S 1,500 S S S S S S 27.9
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

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.