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Table 1-1: Public Road Length, Miles by Functional System: 2006

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State Interstate Other principal and minor arterials1 Major and minor collectors Local Total
Alabama 908 9,269 20,530 65,814 96,521
Alaska 1,081 1,516 2,829 9,361 14,787
Arizona 1,169 5,887 8,121 45,199 60,376
Arkansas 655 6,978 20,325 71,047 99,005
California 2,460 28,500 31,992 107,338 170,290
Colorado 954 9,243 16,253 61,571 88,021
Connecticut 346 2,995 3,200 14,708 21,249
Delaware 41 668 1,052 4,418 6,179
District of Columbia 13 286 156 1,045 1,500
Florida 1,471 13,438 14,287 92,799 121,995
Georgia 1,244 14,127 22,651 80,177 118,199
Hawaii 55 787 829 2,659 4,330
Idaho 612 4,041 10,311 32,141 47,105
Illinois 2,169 14,589 21,724 100,515 138,997
Indiana2 1,169 8,100 22,684 64,297 96,250
Iowa 781 9,710 31,548 72,045 114,084
Kansas 874 9,706 33,524 96,277 140,381
Kentucky 762 5,931 16,084 55,454 78,231
Louisiana 903 5,587 10,048 44,387 60,925
Maine 367 2,193 5,985 14,238 22,783
Maryland 481 4,077 5,044 21,497 31,099
Massachusetts 573 6,488 4,826 24,051 35,938
Michigan 1,241 14,916 24,503 81,062 121,722
Minnesota3 913 13,653 29,759 87,984 132,309
Mississippi 685 7,500 15,488 50,735 74,408
Missouri 1,181 10,538 24,903 90,583 127,205
Montana 1,192 6,037 16,221 49,698 73,148
Nebraska 482 8,097 20,730 64,070 93,379
Nevada 571 3,150 4,994 24,988 33,703
New Hampshire 225 1,590 2,754 11,078 15,647
New Jersey 431 6,164 4,150 27,816 38,561
New Mexico 1,000 5,106 8,511 49,179 63,796
New York 1,697 14,612 20,664 76,644 113,617
North Carolina 1,082 9,960 17,467 74,991 103,500
North Dakota 571 5,912 11,778 68,578 86,839
Ohio 1,574 11,399 22,589 89,545 125,107
Oklahoma 933 8,386 25,260 78,506 113,085
Oregon 728 7,077 17,614 38,939 64,358
Pennsylvania 1,758 13,819 19,791 85,924 121,292
Rhode Island 71 918 884 4,655 6,528
South Carolina 843 7,276 15,081 43,042 66,242
South Dakota 679 6,401 19,127 58,022 84,229
Tennessee 1,104 9,195 17,851 63,266 91,416
Texas 3,233 30,069 63,477 208,491 305,270
Utah 936 3,477 7,737 31,619 43,769
Vermont 320 1,322 3,131 9,633 14,406
Virginia 1,117 8,556 14,090 48,568 72,331
Washington 764 8,024 16,680 57,788 83,256
West Virginia 555 3,330 8,730 24,439 37,054
Wisconsin 743 12,683 21,677 79,382 114,485
Wyoming 913 3,593 11,147 12,181 27,834
United States, total 46,630 406,876 790,791 2,772,444 4,016,741
U.S. total (incl. Puerto Rico) 46,895 408,629 792,516 2,784,971 4,033,011

1 Includes other freeways and expressways.

2 Excludes 788 miles of Federal agency owned roads.

3 Includes 274 miles of miscoded non-Interstate functional system length or rural/urban categorization or both.

NOTE: The difference in total miles between tables 1-1 and 1-2 results from the Federal Highway Administration's (FHWA) expansion of sample data to derive estimates of road length by different variables. FHWA considers the length totals in this table to be the control totals should a single value be required.

SOURCE: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics 2006, Washington, DC: 2008, Table HM-20.
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