USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

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 118,573 100 181,511 100 38,978 100 437 11.6 - 13.1 - 12.4 - 8.1
Less than 50 lbs 4,739 4.0 109 0.1 62 0.2 639 19.7 1.1 21.0 - 25.5 0.1 9.6
50 - 99 lbs 1,562 1.3 82 - 29 0.1 349 24.0 0.4 25.6 - 35.2 - 10.2
100 - 499 lbs 4,731 4.0 628 0.3 151 0.4 249 13.1 0.7 14.6 0.1 20.2 0.1 15.5
500 - 749 lbs 1,742 1.5 338 0.2 72 0.2 213 9.0 0.2 13.9 - 7.9 - 13.0
750 - 999 lbs 1,239 1.0 273 0.2 58 0.1 212 11.3 0.2 14.7 - 15.4 - 17.5
1,000 - 9,999 lbs 34,726 29.3 6,274 3.5 1,802 4.6 266 29.8 4.9 14.9 1.3 14.4 0.9 8.3
10,000 - 49,999 lbs 50,165 42.3 60,943 33.6 15,368 39.4 255 8.1 2.5 10.9 3.1 9.5 1.7 7.3
50,000 - 99,999 lbs 8,623 7.3 73,708 40.6 4,115 10.6 55 22.6 1.6 22.4 4.3 26.5 2.7 16.0
More than 100,000 lbs 11,045 9.3 39,156 21.6 17,321 44.4 593 18.2 1.5 26.1 4.2 19.5 3.1 10.0

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 103,165 100 175,597 100 34,610 100 190 11.1 - 13.4 - 13.5 - 6.2
Less than 50 lbs 1,231 1.2 35 - 6 - 190 22.3 0.4 13.4 - 25.5 - 23.2
50 - 99 lbs 718 0.7 54 - 9 - 152 17.1 0.2 23.7 - 30.1 - 21.0
100 - 499 lbs 3,539 3.4 557 0.3 100 0.3 181 12.6 0.6 13.5 0.1 11.3 0.1 21.2
500 - 749 lbs 1,576 1.5 322 0.2 64 0.2 199 8.6 0.2 13.5 - 9.7 - 14.6
750 - 999 lbs 1,155 1.1 270 0.2 56 0.2 205 11.3 0.2 14.9 - 16.2 - 17.8
1,000 - 9,999 lbs 28,041 27.2 5,760 3.3 1,363 3.9 230 27.1 4.1 13.1 1.1 8.3 0.5 11.3
10,000 - 49,999 lbs 48,922 47.4 59,951 34.1 14,542 42.0 245 8.5 2.5 10.9 3.4 10.0 2.3 6.6
50,000 - 99,999 lbs 8,566 8.3 72,870 41.5 4,021 11.6 55 22.6 1.8 22.0 4.3 25.9 2.7 16.1
More than 100,000 lbs 9,415 9.1 35,779 20.4 14,450 41.7 558 19.7 1.4 28.3 4.2 22.1 3.2 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 94,228 100 149,399 100 20,517 100 175 11.1 - 14.0 - 8.7 - 6.3
Less than 50 lbs 964 1.0 34 - 5 - 149 26.5 0.4 13.7 - 27.3 - 29.4
50 - 99 lbs 687 0.7 54 - 8 - 147 18.2 0.2 23.9 - 31.7 - 22.3
100 - 499 lbs 3,463 3.7 556 0.4 97 0.5 178 12.6 0.7 13.5 0.1 11.3 0.1 21.5
500 - 749 lbs 1,517 1.6 321 0.2 64 0.3 198 9.8 0.2 13.5 0.1 9.8 - 14.5
750 - 999 lbs 1,091 1.2 267 0.2 53 0.3 197 11.0 0.2 15.0 - 17.1 - 18.3
1,000 - 9,999 lbs 27,841 29.5 5,749 3.8 1,357 6.6 229 27.4 4.4 13.2 1.3 8.2 0.6 11.3
10,000 - 49,999 lbs 48,839 51.8 59,842 40.1 14,451 70.4 243 8.5 2.8 10.9 4.1 10.1 3.3 6.7
50,000 - 99,999 lbs 8,504 9.0 72,467 48.5 3,889 19.0 54 22.7 1.9 22.2 4.7 26.8 3.5 16.4
More than 100,000 lbs S S S S 591 2.9 S S S S S 48.0 1.5 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 64,544 100 70,907 100 15,462 100 485 15.5 - 21.2 - 9.2 - 9.7
Less than 50 lbs 230 0.4 5 - 4 - 845 32.4 0.2 35.0 - 36.0 - 8.2
50 - 99 lbs 275 0.4 9 - 6 - 733 29.9 0.2 37.0 - 37.1 - 8.4
100 - 499 lbs 1,764 2.7 101 0.1 74 0.5 754 14.2 0.6 13.8 0.1 11.9 0.1 6.7
500 - 749 lbs 830 1.3 64 0.1 49 0.3 771 17.7 0.3 17.6 - 12.9 - 8.1
750 - 999 lbs 569 0.9 56 0.1 40 0.3 716 19.2 0.3 17.6 - 16.6 - 5.4
1,000 - 9,999 lbs 21,472 33.3 2,716 3.8 1,076 7.0 449 35.0 5.3 26.3 1.7 9.7 0.6 18.0
10,000 - 49,999 lbs 33,752 52.3 28,013 39.5 11,630 75.2 430 10.0 3.7 13.6 8.3 11.3 3.6 5.8
50,000 - 99,999 lbs 4,446 6.9 31,264 44.1 2,078 13.4 68 32.9 2.6 36.3 7.5 28.0 3.3 22.8
More than 100,000 lbs S S S S S S S S S S S S S S

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 29,684 100 78,492 100 5,054 100 56 9.9 - 19.6 - 16.4 - 7.5
Less than 50 lbs 734 2.5 29 - 1 - 35 28.6 1.1 14.3 - 22.0 - 13.8
50 - 99 lbs 412 1.4 45 0.1 2 - 44 21.1 0.2 24.6 - 27.2 - 18.0
100 - 499 lbs 1,699 5.7 455 0.6 23 0.5 52 18.1 0.9 16.3 0.3 28.8 0.2 12.5
500 - 749 lbs 687 2.3 257 0.3 15 0.3 59 17.8 0.5 18.5 0.1 28.4 0.1 9.7
750 - 999 lbs 523 1.8 211 0.3 13 0.3 61 21.5 0.3 20.3 0.1 27.7 0.1 19.8
1,000 - 9,999 lbs 6,369 21.5 3,033 3.9 281 5.6 82 9.8 2.1 9.3 1.2 10.5 1.1 9.4
10,000 - 49,999 lbs 15,087 50.8 31,829 40.6 2,821 55.8 90 14.8 2.5 15.8 4.3 11.8 4.6 9.8
50,000 - 99,999 lbs 4,058 13.7 41,203 52.5 1,811 35.8 44 19.6 2.8 26.1 6.6 32.0 5.3 32.5
More than 100,000 lbs 115 0.4 1,429 1.8 86 1.7 S 39.4 0.2 37.3 2.2 13.7 0.9 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 7,842 100 25,396 100 13,418 100 627 19.6 - 17.3 - 21.2 - 7.3
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 S S S S S S S S S S S S
500 - 749 lbs - - - - S S S 41.9 - 50.0 - 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 S S S S 438 S S S S S S 37.4
10,000 - 49,999 lbs S S 101 0.4 S S 890 S S 39.5 0.4 S S 38.9
50,000 - 99,999 lbs S S S S 132 1.0 S S S S S 35.7 0.6 S
More than 100,000 lbs 7,603 97.0 24,887 98.0 13,200 98.4 661 20.6 2.5 17.8 1.9 21.6 0.7 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 S S S S S S 821 S S S S S S 21.8
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 821 S S S S S S 21.8

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 S S S S S S 821 S S S S S S 21.8
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 821 S S S S S S 21.8

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 602 100 11 100 S S 856 43.9 - 47.9 - S S 7.2
Less than 50 lbs S S 1 11.3 1 6.8 831 S S 36.1 5.6 34.1 7.1 7.4
50 - 99 lbs 31 5.1 - 3.3 - 1.8 845 34.0 11.1 45.1 9.4 31.7 7.1 17.3
100 - 499 lbs S S 1 13.2 2 14.0 1,334 S S 44.6 8.0 43.1 13.2 13.0
500 - 749 lbs 59 9.7 1 4.7 - 1.2 S 44.9 20.0 33.2 17.6 39.6 12.5 S
750 - 999 lbs S S S S S S 1,147 S S S S S S 21.8
1,000 - 9,999 lbs 93 15.4 1 6.7 S S 1,399 49.0 17.7 21.3 7.5 S S 33.1
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 5 100 32 100 S S S 5.8 - 43.8 - 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 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 14,185 100 4,459 100 3,986 100 812 21.9 - 8.9 - 11.3 - 6.7
Less than 50 lbs 3,398 24.0 72 1.6 56 1.4 815 23.0 7.2 27.5 0.5 25.7 0.4 7.5
50 - 99 lbs 831 5.9 27 0.6 20 0.5 755 34.9 2.1 36.6 0.3 38.3 0.2 9.3
100 - 499 lbs 1,116 7.9 58 1.3 51 1.3 794 22.5 2.0 39.1 0.6 44.0 0.5 7.8
500 - 749 lbs 134 0.9 11 0.2 8 0.2 755 23.9 0.5 29.1 0.1 29.2 0.1 20.1
750 - 999 lbs S S 3 0.1 2 0.1 800 S S 23.9 - 32.1 - 15.9
1,000 - 9,999 lbs S S S S S S 895 S S S S S S 34.1
10,000 - 49,999 lbs 759 5.3 379 8.5 567 14.2 1,637 35.9 3.9 32.0 3.1 33.8 4.3 15.4
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 1,523 10.7 2,959 66.4 2,826 70.9 927 15.4 3.7 13.1 7.7 12.3 5.0 13.4

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 5,553 100 169 100 135 100 811 23.1 - 29.0 - 31.4 - 6.9
Less than 50 lbs 3,397 61.2 72 42.8 56 41.3 815 23.0 3.7 27.5 4.9 25.7 4.9 7.5
50 - 99 lbs 831 15.0 27 15.8 20 15.0 755 34.9 2.4 36.6 2.3 38.3 1.9 9.3
100 - 499 lbs 1,111 20.0 57 33.7 50 36.6 789 22.7 3.4 39.9 3.8 45.1 4.2 7.3
500 - 749 lbs 132 2.4 10 6.1 7 5.4 741 24.1 0.8 28.5 2.2 27.0 2.1 20.7
750 - 999 lbs S S 3 1.6 2 1.7 853 S S 22.2 1.5 30.1 1.7 12.4
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 7,576 100 3,379 100 2,861 100 880 43.2 - 11.9 - 14.4 - 16.5
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 1 - S S 1,043 S S 39.5 0.2 S S 49.3
500 - 749 lbs S S S S S S 1,337 S S S S S S 19.1
750 - 999 lbs S S S S S S 82 S S S S S S 30.4
1,000 - 9,999 lbs S S S S S S 891 S S S S S S 36.3
10,000 - 49,999 lbs 196 2.6 189 5.6 328 11.5 1,794 20.1 5.2 36.4 4.2 38.0 6.1 16.8
50,000 - 99,999 lbs S S S S S S S S S S S S S S
More than 100,000 lbs 1,063 14.0 2,250 66.6 2,081 72.7 909 17.4 17.2 12.9 8.8 17.2 7.4 14.0

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 854 100 571 100 594 100 S 42.3 - 34.7 - 35.8 - S
Less than 50 lbs - - - - - - - - - - - - - -
50 - 99 lbs - - - - - - - - - - - - - -
100 - 499 lbs 1 0.2 S S S S 1,892 49.8 3.6 S S S S 15.5
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 554 64.8 S S S S 1,452 40.1 10.9 S S S S 12.7
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 966 S S S S S S 3.7

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 10 100 13 100 58 100 S 41.4 - 23.7 - 47.9 - 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

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 191 100 328 100 339 100 1,058 33.6 - 36.7 - 39.4 - 5.7
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 - - - - - - - - - - - - - -
More than 100,000 lbs 189 99.1 327 99.8 338 99.8 1,044 11.1 0.6 16.6 0.1 22.6 0.1 7.6

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 1,223 100 1,455 100 382 100 S 12.4 - 33.5 - 35.6 - S
Less than 50 lbs S S 2 0.1 - - S S S 49.2 0.1 33.8 0.1 S
50 - 99 lbs 13 1.0 1 0.1 - - S 49.1 0.9 41.4 0.1 42.1 - S
100 - 499 lbs 76 6.2 13 0.9 1 0.2 S 47.2 3.2 47.9 0.7 45.4 0.2 S
500 - 749 lbs S S S S - 0.1 S S S S S 49.5 0.2 S
750 - 999 lbs S S S S S S S S S S S S S S
1,000 - 9,999 lbs 364 29.8 70 4.8 39 10.3 546 27.5 8.9 29.1 6.2 37.7 8.4 17.5
10,000 - 49,999 lbs 484 39.6 614 42.2 259 67.8 405 29.3 8.5 44.3 9.4 42.7 7.8 22.9
50,000 - 99,999 lbs S S S S S S 114 S S S S S S 24.5
More than 100,000 lbs 107 8.8 S S S S S 19.8 3.9 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.