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 178,154 100 143,502 100 52,152 100 668 1.9 - 11.6 - 15.9 - 3.8
Less than 50 lbs 19,164 10.8 421 0.3 274 0.5 809 8.0 1.0 8.0 - 10.2 0.1 2.8
50 - 99 lbs 4,398 2.5 240 0.2 90 0.2 377 6.2 0.2 8.8 - 8.4 - 9.0
100 - 499 lbs 15,388 8.6 1,670 1.2 509 1.0 309 5.8 0.5 12.2 0.2 6.4 0.2 10.6
500 - 749 lbs 4,610 2.6 819 0.6 214 0.4 261 8.1 0.2 6.5 0.1 7.4 0.1 9.6
750 - 999 lbs 3,046 1.7 581 0.4 169 0.3 288 5.8 0.1 6.6 - 9.1 0.1 8.9
1,000 - 9,999 lbs 33,950 19.1 11,128 7.8 3,177 6.1 282 5.3 0.9 4.7 0.6 5.4 0.8 6.8
10,000 - 49,999 lbs 85,402 47.9 82,018 57.2 24,813 47.6 304 3.8 1.3 6.9 2.8 5.5 5.9 6.0
50,000 - 99,999 lbs 7,550 4.2 18,613 13.0 2,946 5.6 156 15.4 0.6 19.0 1.5 23.0 0.8 12.1
More than 100,000 lbs 4,645 2.6 28,011 19.5 19,958 38.3 848 9.4 0.3 32.1 3.4 33.3 6.8 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 149,503 100 131,876 100 41,928 100 261 3.3 - 8.9 - 11.4 - 11.0
Less than 50 lbs 4,278 2.9 135 0.1 27 0.1 281 12.8 0.4 10.9 - 16.9 - 20.4
50 - 99 lbs 1,775 1.2 152 0.1 30 0.1 196 9.8 0.1 12.7 - 12.9 - 17.6
100 - 499 lbs 10,347 6.9 1,460 1.1 359 0.9 237 8.9 0.5 14.4 0.2 9.8 0.1 13.7
500 - 749 lbs 4,173 2.8 790 0.6 189 0.4 239 8.2 0.2 6.9 0.1 6.7 0.1 9.6
750 - 999 lbs 2,928 2.0 573 0.4 161 0.4 279 6.8 0.2 6.8 - 9.7 0.1 8.7
1,000 - 9,999 lbs 33,154 22.2 10,884 8.3 3,054 7.3 271 5.3 0.8 4.7 0.5 5.2 0.7 6.5
10,000 - 49,999 lbs 81,470 54.5 80,194 60.8 22,682 54.1 287 3.7 1.1 7.0 2.0 5.0 5.2 6.1
50,000 - 99,999 lbs 7,470 5.0 18,100 13.7 2,419 5.8 133 15.7 0.7 18.6 1.5 22.1 0.7 11.9
More than 100,000 lbs 3,909 2.6 19,589 14.9 13,007 31.0 783 12.6 0.4 21.5 2.4 31.1 5.9 10.6

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 144,474 100 114,293 100 28,592 100 236 3.4 - 8.0 - 4.7 - 11.3
Less than 50 lbs 3,299 2.3 131 0.1 23 0.1 226 8.6 0.3 11.4 - 17.9 - 24.3
50 - 99 lbs 1,681 1.2 151 0.1 29 0.1 190 9.2 0.1 12.8 - 12.8 - 18.1
100 - 499 lbs 9,936 6.9 1,452 1.3 349 1.2 231 9.0 0.5 14.4 0.3 10.1 0.2 14.3
500 - 749 lbs 4,046 2.8 788 0.7 187 0.7 238 7.7 0.2 7.0 0.1 6.8 0.1 9.7
750 - 999 lbs 2,876 2.0 571 0.5 159 0.6 275 6.9 0.2 6.8 0.1 9.8 0.1 8.6
1,000 - 9,999 lbs 32,957 22.8 10,873 9.5 3,044 10.6 270 5.3 0.9 4.7 0.5 5.2 0.5 6.5
10,000 - 49,999 lbs 80,578 55.8 79,576 69.6 22,018 77.0 281 3.6 1.1 7.1 1.0 5.4 1.9 6.3
50,000 - 99,999 lbs 7,387 5.1 17,878 15.6 2,195 7.7 124 16.1 0.8 18.8 1.8 24.7 1.7 11.9
More than 100,000 lbs 1,714 1.2 2,873 2.5 588 2.1 292 28.7 0.4 32.9 0.8 36.4 0.7 24.1

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 93,007 100 56,787 100 23,362 100 592 5.6 - 6.1 - 4.9 - 4.9
Less than 50 lbs 1,095 1.2 29 0.1 16 0.1 668 20.9 0.2 24.1 - 29.7 - 12.5
50 - 99 lbs 508 0.5 28 - 21 0.1 736 15.2 0.1 16.4 - 17.6 - 8.3
100 - 499 lbs 4,916 5.3 387 0.7 239 1.0 609 11.7 0.4 7.2 0.1 9.0 0.1 3.3
500 - 749 lbs 2,230 2.4 257 0.5 144 0.6 560 13.1 0.2 11.0 0.1 11.1 0.1 6.5
750 - 999 lbs 1,756 1.9 190 0.3 108 0.5 570 9.5 0.3 8.9 - 9.6 - 7.6
1,000 - 9,999 lbs 20,265 21.8 4,378 7.7 2,391 10.2 574 9.2 1.2 7.6 0.8 5.7 0.6 4.3
10,000 - 49,999 lbs 56,259 60.5 38,589 68.0 18,200 77.9 482 5.4 1.5 2.9 2.9 6.1 2.2 6.0
50,000 - 99,999 lbs 5,081 5.5 11,655 20.5 1,756 7.5 148 18.4 0.9 23.9 3.4 25.5 1.8 27.6
More than 100,000 lbs 898 1.0 1,274 2.2 487 2.1 457 31.4 0.3 32.2 0.7 43.1 1.0 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 51,467 100 57,506 100 5,231 100 83 5.6 - 12.9 - 11.9 - 11.7
Less than 50 lbs 2,204 4.3 102 0.2 7 0.1 65 13.6 0.5 16.4 - 16.0 - 13.6
50 - 99 lbs 1,174 2.3 123 0.2 8 0.2 66 12.9 0.3 15.6 0.1 13.8 - 15.5
100 - 499 lbs 5,020 9.8 1,066 1.9 110 2.1 104 15.0 1.0 19.6 0.6 20.6 0.6 22.7
500 - 749 lbs 1,816 3.5 531 0.9 43 0.8 81 14.3 0.3 13.2 0.2 13.3 0.2 14.7
750 - 999 lbs 1,120 2.2 381 0.7 50 1.0 128 14.8 0.2 12.2 0.1 27.6 0.4 18.3
1,000 - 9,999 lbs 12,692 24.7 6,495 11.3 653 12.5 95 4.0 1.0 6.3 1.2 9.6 0.9 15.1
10,000 - 49,999 lbs 24,319 47.3 40,987 71.3 3,819 73.0 95 5.1 1.6 13.5 2.0 15.1 2.7 7.8
50,000 - 99,999 lbs 2,306 4.5 6,223 10.8 440 8.4 73 21.7 0.7 37.8 2.3 24.1 1.7 43.9
More than 100,000 lbs 816 1.6 S S 101 1.9 S 37.2 0.5 S S 42.5 1.2 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 3,148 100 17,483 100 13,190 100 867 9.9 - 26.3 - 30.9 - 7.1
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 - - - - 128 S S 42.5 - 32.1 - 14.5
750 - 999 lbs S S S S S S S S S S S S S S
1,000 - 9,999 lbs 8 0.2 4 - 3 - 729 16.0 0.2 30.3 0.1 40.9 0.1 27.8
10,000 - 49,999 lbs 882 28.0 611 3.5 650 4.9 1,080 27.2 5.8 28.5 2.9 27.3 4.7 8.9
50,000 - 99,999 lbs S S 152 0.9 121 0.9 704 S S 41.0 1.2 49.6 1.3 23.2
More than 100,000 lbs 2,191 69.6 16,716 95.6 12,417 94.1 826 12.4 5.6 27.3 3.6 32.3 5.2 10.5

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 22 100 S S S S 1,495 39.7 - S S S S 29.1
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 18 81.7 69 94.6 S S 1,491 47.5 11.2 44.8 3.5 S S 40.6
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 22 100 S S S S 1,495 39.7 - S S S S 29.1
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 18 81.7 69 94.6 S S 1,491 47.5 11.2 44.8 3.5 S S 40.6
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 1,859 100 26 100 35 100 1,163 24.7 - 15.2 - 23.9 - 6.6
Less than 50 lbs 979 52.7 3 13.3 4 11.2 1,156 41.2 9.1 21.5 3.4 19.2 3.7 6.2
50 - 99 lbs 93 5.0 1 4.6 1 3.4 1,001 34.5 1.4 36.3 1.0 34.6 1.0 12.7
100 - 499 lbs 410 22.1 7 29.0 10 29.3 1,364 24.6 7.2 27.9 9.4 29.9 9.3 12.6
500 - 749 lbs S S 1 5.6 2 4.3 1,095 S S 31.4 2.6 46.0 3.0 16.1
750 - 999 lbs 52 2.8 2 7.0 S S 1,382 38.7 1.0 36.5 3.8 S S 14.7
1,000 - 9,999 lbs 189 10.2 7 26.3 7 19.2 1,129 23.7 4.8 25.1 5.7 19.9 3.3 17.9
10,000 - 49,999 lbs 9 0.5 S S S S 2,361 7.0 1.1 S S S S 34.5
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 24,379 100 S S S S 960 10.0 - S S S S 2.0
Less than 50 lbs 14,573 59.8 275 2.6 247 2.5 968 10.4 2.2 11.6 3.1 11.7 2.0 1.9
50 - 99 lbs 2,510 10.3 78 0.7 59 0.6 750 9.7 1.0 9.8 1.0 10.4 0.5 6.4
100 - 499 lbs 4,679 19.2 172 1.6 146 1.5 829 20.9 1.9 12.1 2.4 14.4 1.5 8.3
500 - 749 lbs 376 1.5 22 0.2 23 0.2 1,004 25.6 0.4 22.8 0.3 22.4 0.2 16.6
750 - 999 lbs 45 0.2 4 - 5 0.1 1,197 26.8 0.1 22.2 - 28.5 0.1 22.5
1,000 - 9,999 lbs 145 0.6 22 0.2 69 0.7 4,273 35.2 0.2 27.9 0.3 46.3 0.7 22.4
10,000 - 49,999 lbs 1,486 6.1 1,193 11.4 1,828 18.7 1,577 14.9 1.0 20.3 9.4 20.0 11.1 12.9
50,000 - 99,999 lbs 74 0.3 S S S S 1,075 30.1 0.3 S S S S 24.4
More than 100,000 lbs 491 2.0 S S S S 1,033 35.5 0.8 S S S S 6.3

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 22,161 100 549 100 474 100 958 11.1 - 9.3 - 9.8 - 1.9
Less than 50 lbs 14,573 65.8 275 50.1 247 52.1 968 10.4 1.6 11.6 2.2 11.7 2.4 1.9
50 - 99 lbs 2,509 11.3 78 14.2 59 12.4 750 9.7 1.2 9.8 0.9 10.4 1.2 6.4
100 - 499 lbs 4,665 21.1 171 31.2 144 30.4 825 21.0 2.0 12.2 2.1 14.8 2.4 8.5
500 - 749 lbs 373 1.7 21 3.9 21 4.3 953 25.9 0.5 21.5 0.9 25.1 1.3 19.1
750 - 999 lbs 41 0.2 4 0.7 3 0.7 865 29.1 0.1 19.8 0.2 26.6 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 1,970 100 S S S S 1,222 17.8 - S S S S 10.5
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 S S 1 - 1 - 1,558 S S 42.3 - 41.8 0.1 12.5
500 - 749 lbs S S S S S S 1,947 S S S S S S 34.6
750 - 999 lbs S S S S S S 2,384 S S S S S S 15.3
1,000 - 9,999 lbs 41 2.1 12 0.1 S S 1,659 34.3 1.3 36.6 0.6 S S 19.4
10,000 - 49,999 lbs 1,374 69.8 1,099 11.4 1,515 17.7 1,374 14.9 4.9 19.9 14.4 22.3 14.1 8.6
50,000 - 99,999 lbs 45 2.3 S S 142 1.7 S 31.8 2.9 S S 43.2 8.9 S
More than 100,000 lbs 491 24.9 S S S S 1,033 35.5 4.7 S S S S 6.3

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 238 100 S S S S 3,994 32.5 - S S S S 20.9
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 - 0.1 S S S S 6,714 32.8 0.4 S S S S 23.5
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 104 43.8 10 3.0 S S 6,062 47.1 13.7 40.6 19.2 S S 23.2
10,000 - 49,999 lbs S S S S 300 42.4 3,878 S S S S 39.2 14.9 20.7
50,000 - 99,999 lbs S S S S S S 1,545 S S S S S S -
More than 100,000 lbs - - - - - - - - - - - - - -

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 8 100 8 100 13 100 1,524 40.5 - 2.6 - 8.3 - 3.2
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 8 100.0 8 100.0 13 100.0 1,524 40.5 - 2.6 - 8.3 - 3.2
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 2,470 S S S S S S 1.2
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 - - - - - - - - - - - - - -
50,000 - 99,999 lbs - - - - - - - - - - - - - -
More than 100,000 lbs - - - - - - - - - - - - - -

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 4,271 100 1,127 100 471 100 S 24.6 - 32.3 - 27.8 - S
Less than 50 lbs 313 7.3 12 1.1 1 0.1 S 28.7 6.3 34.1 0.7 29.9 0.1 S
50 - 99 lbs 114 2.7 10 0.9 1 0.2 98 39.3 1.2 40.0 0.8 37.3 0.3 44.3
100 - 499 lbs 362 8.5 S S 4 0.8 S 49.6 4.9 S S 29.6 0.8 S
500 - 749 lbs 61 1.4 7 0.6 S S 291 32.2 2.8 21.1 0.3 S S 33.2
750 - 999 lbs S S 5 0.4 S S 585 S S 38.1 0.2 S S 31.6
1,000 - 9,999 lbs 651 15.2 222 19.7 54 11.6 360 23.6 5.2 42.0 4.2 28.9 4.4 36.3
10,000 - 49,999 lbs 2,446 57.3 631 56.0 303 64.5 435 43.7 11.2 41.9 9.0 29.9 8.8 26.3
50,000 - 99,999 lbs S S 64 5.7 S S S S S 48.3 6.4 S S S
More than 100,000 lbs S S 137 12.1 73 15.6 S S S 22.8 13.8 50.0 16.9 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.