Office of Operations Freight Management and Operations

Freight Facts and Figures 2009

Table 3-10. Ton Miles of Truck Shipments by State: 2002

The measure of ton miles combines the weight and distance of freight movement to indicate how much overall demand freight is placing on the transportation system.  This measure also demonstrates the dominant role of interstate commerce in freight movements for most states.  Two-thirds of ton miles moved by truck are classified as interstate commerce.  Almost 40 percent of ton miles moved by truck pass through a state between out-of-state origins and destinations.  In the Midwest and many western states, a large majority of ton miles is considered through traffic, meaning that such traffic uses one state highway in order to serve shippers and consumers in other states.

Millions

Table in Excel format

State Leaving Entering Within Local Through Total
Alabama 9,021 8,491 22,871 227 15,612 56,221
Alaska 70 1,165 6,706 53 0 7,994
Arizona 4,297 6,084 5,798 470 27,495 44,144
Arkansas 7,567 7,039 13,191 77 24,661 52,535
California 22,584 27,560 114,709 1,847 3,545 170,246
Colorado 3,118 5,088 11,234 200 6,471 26,111
Connecticut 1,082 1,493 1,494 172 5,509 9,751
Delaware 441 564 589 94 1,915 3,603
District of Columbia 9 36 2 5 116 168
Florida 10,371 15,835 74,428 936 905 102,475
Georgia 13,054 13,045 30,039 242 18,433 74,814
Hawaii 0 0 0 17 0 17
Idaho 1,539 2,034 2,933 1,389 6,992 14,887
Illinois 15,828 12,298 29,653 262 35,928 93,969
Indiana 9,104 9,129 12,598 17 40,183 71,031
Iowa 6,062 4,930 5,652 201 12,278 29,122
Kansas 4,665 3,761 7,182 152 10,824 26,585
Kentucky 6,831 7,417 12,634 188 23,849 50,919
Louisiana 7,386 6,620 15,381 91 9,312 38,791
Maine 2,119 956 3,647 280 1,025 8,026
Maryland 3,897 3,450 5,337 151 8,557 21,392
Massachusetts 1,838 2,839 4,452 353 2,885 12,367
Michigan 9,447 8,797 23,751 432 6,507 48,934
Minnesota 4,579 4,250 10,915 40 6,261 26,046
Mississippi 5,129 5,329 11,470 358 15,528 37,815
Missouri 7,148 7,887 6,770 18 35,474 57,297
Montana 1,859 1,741 3,832 36 11,049 18,517
Nebraska 2,045 2,356 3,709 408 17,549 26,067
Nevada 1,137 2,210 1,707 57 10,205 15,315
New Hampshire 857 873 917 297 1,149 4,093
New Jersey 3,822 5,319 5,674 60 7,567 22,442
New Mexico 1,710 3,098 5,390 376 27,881 38,455
New York 7,527 6,938 16,164 380 12,990 43,999
North Carolina 9,468 8,354 29,062 23 11,675 58,582
North Dakota 1,063 615 2,518 544 5,791 10,531
Ohio 20,485 16,249 27,478 618 39,260 104,089
Oklahoma 5,701 4,815 17,247 353 30,210 58,326
Oregon 4,734 5,156 15,432 224 7,525 33,070
Pennsylvania 15,360 14,528 23,501 62 34,332 87,783
Rhode Island 264 195 232 270 700 1,662
South Carolina 7,309 5,642 12,524 26 13,833 39,335
South Dakota 1,361 1,208 3,416 431 2,917 9,332
Tennessee 10,875 8,480 23,140 1,064 42,170 85,729
Texas 25,061 29,114 82,239 181 38,349 174,944
Utah 4,560 2,247 4,894 62 11,475 23,238
Vermont 706 462 1,184 296 859 3,507
Virginia 7,273 8,833 19,649 347 29,789 65,890
Washington 3,691 4,934 10,078 25 3,285 22,013
West Virginia 2,341 2,400 3,835 252 9,842 18,671
Wisconsin 8,230 7,661 10,787 13 12,102 38,793
Wyoming 2,522 2,195 2,530 312 16,915 24,474

Notes:

Ton miles include domestic flows by truck, domestic portions of international trade by truck to and from ports, and domestic portions of international flows by truck to and from Canada and Mexico.

Technical Notes on Calculating Truck Shipments by State:

Ton miles for shipments by truck among places at least 50 miles apart are estimated by assigning flows in the Freight Analysis Framework (FAF) to the highway network as described in the report on Freight Traffic Analysis at www.ops.fhwa.dot.gov/freight/freight_analysis/faf/faf2_reports/reports7/index.htm. Truck movements carrying international trade to and from maritime ports are counted as originating or terminating at the port, while truck movements across land borders are counted as originating or ending in Canada or Mexico. If the origins and destinations of international trade by truck through maritime ports were treated the same as by truck across land borders, ton miles for each state would remain the same, but the shares entering, leaving, within, and passing through coastal states would change slightly.

Local ton miles for shipments by truck among places less than 50 miles are estimated by multiplying the FAF tonnage originating in the state that was not assigned to the network by the ratio of ton miles to tons for shipments less than 50 miles in the 2002 Commodity Flow Survey. The ratio of ton miles to tons is the average distance traveled weighted by the weight of the shipments. The average for the United States was substituted for Minnesota, which has suppressed values in the 2002 Commodity Flow Survey. Local ton miles are counted with the state of origin. While some local traffic crosses state lines, the ton miles are very small and nationwide data to allocate that local traffic to flows entering and leaving each state are not available.

Except for truck moves of foreign trade to and from maritime ports, estimates of long-distance and local ton miles do not include truck portions of shipments using more than one mode. Inclusion of the truck portions of intermodal shipments would only increase national ton miles between one-half and two percent, depending on the trucking share of postal, parcel, and courier shipments. This estimated increase is based on the difference between total truck ton miles and truck-only ton miles plus the ton miles for postal, parcel, and courier shipments in the Commodity Flow Survey.1

1U.S. Department of Commerce, Census Bureau, 2002 Commodity Flow Survey, EC02TCF-US, December 2004, tables 1a and 2a.

Sources:

Ton miles between places over 50 miles apart: U.S. Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, Freight Analysis Framework, version 2.3, August 2009.

Ton miles between places less than 50 miles apart (Local):  Ibid., and U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, Census Bureau, 2002 Commodity Flow Survey, July 2009.

 


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