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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2024 / Table HM-63

Highway Statistics Series

Highway Statistics 2024


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Functional System Length - 2024 (1)
    Miles by Measured Pavement Roughness / Present Serviceability Rating

October 17, 2025

Table HM-63
(Sheet 1 of 3)
STATE RURAL MAJOR COLLECTOR NOT REPORTED (4)
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 1,135 4,406 4,906 618 426 11,491 - - - - - - 11,491 734
Alaska 42 287 338 128 162 957 - - - - - - 957 27
Arizona 206 677 1,652 417 279 3,231 - - - - - - 3,231 78
Arkansas 243 3,716 2,275 1,054 510 7,799 - - 276 905 - 1,181 8,980 2,076
California 123 581 1,705 784 2,632 5,825 - - - - - - 5,825 -
Colorado 427 1,104 1,741 572 556 4,400 - - - - - - 4,400 -
Connecticut 19 169 471 115 75 849 - - 1 - - 1 850 -
Delaware 32 133 187 17 10 379 - - - - - - 379 1
District of Columbia - - - - - - - - - - - - - -
Florida 419 1,348 1,690 262 113 3,832 - 12 2 0 - 14 3,846 0
Georgia 1,328 4,814 5,244 682 260 12,328 - 4 20 - - 24 12,352 -
Hawaii 0 16 97 45 62 220 - - - - - - 220 0
Idaho 82 295 349 68 50 845 416 605 2,201 630 88 3,940 4,784 336
Illinois 1,795 3,604 2,881 415 107 8,802 - - - - - - 8,802 -
Indiana 375 655 790 80 28 1,929 - - - - - - 1,929 8,067
Iowa - - - - - - - - - - - - - 12,723
Kansas 798 2,523 1,101 106 82 4,610 - - - - - - 4,610 7,689
Kentucky 272 2,017 2,965 336 112 5,703 - - - - - - 5,703 111
Louisiana 293 1,449 1,957 521 680 4,900 7 - 3 - 7 16 4,916 4
Maine 385 933 1,293 330 268 3,209 - - - - - - 3,209 11
Maryland 108 385 642 119 80 1,334 - - - - - - 1,334 3
Massachusetts 12 96 182 21 5 316 - - - - - - 316 511
Michigan 1,948 3,493 4,467 1,534 1,244 12,685 120 5 238 - 127 490 13,175 79
Minnesota 2,563 4,793 5,701 1,166 552 14,776 - - - - - - 14,776 14
Mississippi 263 1,482 5,426 2,438 1,963 11,572 - - - - - - 11,572 -
Missouri 251 2,656 9,243 2,815 1,251 16,216 - - - - - - 16,216 3
Montana 405 1,657 2,119 536 366 5,084 - - - - - - 5,084 -
Nebraska 646 854 481 163 48 2,191 1,030 717 199 - - 1,947 4,138 1,223
Nevada 80 475 1,191 265 117 2,127 - - - - - - 2,127 -
New Hampshire 128 297 420 119 110 1,074 - - 0 - - 0 1,074 -
New Jersey - - - - - - 389 83 409 - - 881 881 -
New Mexico 61 454 1,723 1,051 1,038 4,327 - - - - - - 4,327 20
New York 327 2,707 2,269 248 147 5,699 - - - - - - 5,699 4
North Carolina 121 2,054 5,278 444 143 8,040 - - - - - - 8,040 28
North Dakota 1,171 3,447 2,297 328 129 7,373 - 19 30 - - 49 7,422 -
Ohio 1,067 5,485 3,715 445 262 10,973 - - - - - - 10,973 37
Oklahoma 487 2,786 3,255 536 237 7,301 - - - - - - 7,301 11,102
Oregon 51 513 937 314 254 2,068 2,579 1,118 914 350 121 5,082 7,150 2
Pennsylvania 205 1,511 3,132 1,215 1,558 7,621 - - - - - - 7,621 320
Rhode Island 5 28 65 33 11 142 - - - - - - 142 0
South Carolina 274 2,850 4,041 1,310 822 9,296 - - - - - - 9,296 -
South Dakota 547 2,050 3,461 640 374 7,072 - - - - - - 7,072 336
Tennessee 429 961 601 42 12 2,045 - - - - - - 2,045 -
Texas 1,274 7,730 18,950 3,491 2,642 34,087 - - - - - - 34,087 445
Utah 157 882 1,005 220 94 2,358 - - - - - - 2,358 34
Vermont - - - - - - - - - - - - - -
Virginia 51 984 4,066 1,258 878 7,238 - - - - - - 7,238 10
Washington 37 813 4,118 1,824 734 7,526 - - - - - - 7,526 92
West Virginia 18 988 2,784 962 897 5,649 - - - - - - 5,649 33
Wisconsin 2,620 3,241 3,657 1,177 963 11,658 - - - - - - 11,658 472
Wyoming 437 838 667 164 54 2,159 - - - - - - 2,159 -
U.S. Total 23,717 85,237 127,537 31,426 23,397 291,315 4,541 2,562 4,294 1,885 343 13,625 304,940 46,620
Puerto Rico - 4 29 55 288 375 - - - - - - 375 29
Grand Total 23,717 85,241 127,566 31,481 23,684 291,690 4,541 2,562 4,294 1,885 343 13,625 305,315 46,650

 

October 17, 2025

Table HM-63
(Sheet 2 of 3)
STATE URBAN MINOR ARTERIAL NOT REPORTED (4)
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 265 708 913 208 130 2,224 - - - - - - 2,224 114
Alaska 22 53 82 25 19 201 - - - - - - 201 6
Arizona 35 219 1,032 391 273 1,950 - - - - - - 1,950 552
Arkansas - 3 10 6 4 23 21 67 442 642 126 1,299 1,322 532
California 75 179 549 367 324 1,495 - - - - - - 1,495 -
Colorado 24 217 848 332 428 1,849 - - - - - - 1,849 -
Connecticut 22 283 865 275 230 1,675 0 1 0 - - 1 1,676 -
Delaware 15 56 91 33 24 219 - - - - - - 219 1
District of Columbia - 0 13 23 122 158 - - - - - - 158 0
Florida 316 1,222 1,648 328 236 3,750 88 242 77 15 - 422 4,171 27
Georgia 351 1,462 1,894 319 235 4,260 2 8 4 2 0 15 4,276 -
Hawaii 7 37 71 37 49 200 - - - - - - 200 1
Idaho 8 11 49 11 16 95 186 131 220 46 4 586 681 30
Illinois 155 633 1,725 648 892 4,054 - - - - - - 4,054 3
Indiana 196 276 161 34 17 684 - - - - - - 684 2,314
Iowa - - 1 3 1 5 - - - - - - 5 1,675
Kansas 22 49 44 13 12 139 - - - - - - 139 1,169
Kentucky 97 360 632 129 92 1,310 - - - - - - 1,310 53
Louisiana 60 365 709 291 339 1,765 19 - 17 - 14 50 1,815 2
Maine 37 96 99 26 25 282 - - - - - - 282 4
Maryland 57 221 671 273 330 1,552 - - - - - - 1,552 5
Massachusetts 25 239 635 344 247 1,490 - - - - - - 1,490 2,529
Michigan 195 683 1,197 408 537 3,021 443 46 405 79 873 1,846 4,867 85
Minnesota 522 905 861 141 160 2,588 - - - - - - 2,588 4
Mississippi 55 185 428 168 228 1,063 - - - - - - 1,063 0
Missouri 57 288 885 442 481 2,152 - - - - - - 2,152 6
Montana 11 63 114 38 48 273 - - - - - - 273 -
Nebraska 16 34 13 3 9 76 295 171 61 - 1 528 604 76
Nevada 98 227 363 121 85 894 - - - - - - 894 -
New Hampshire 51 117 211 60 54 494 - - - - - - 494 -
New Jersey 115 139 185 29 30 498 1,015 917 1,094 5 10 3,041 3,539 -
New Mexico 29 110 282 149 184 754 - - - - - - 754 20
New York 133 897 2,117 907 1,299 5,353 - - - - - - 5,353 84
North Carolina 23 464 1,703 406 217 2,812 - - - - - - 2,812 4
North Dakota 4 36 131 59 55 283 - - - - - - 283 -
Ohio 227 918 1,674 497 592 3,908 - - - - - - 3,908 85
Oklahoma 25 85 29 8 8 155 - - - - - - 155 1,969
Oregon 18 51 66 28 26 189 554 247 226 8 5 1,040 1,229 1
Pennsylvania 57 477 1,681 468 533 3,216 - - - - - - 3,216 397
Rhode Island 4 36 147 71 84 342 - - - - - - 342 10
South Carolina 37 410 1,077 243 121 1,887 - - - - - - 1,887 1
South Dakota 8 22 166 83 92 371 - - - - - - 371 69
Tennessee 129 217 119 22 14 501 - - - - - - 501 4
Texas 227 1,170 3,098 1,386 2,208 8,089 - - - - - - 8,089 302
Utah 25 95 259 102 100 581 - - - - - - 581 2
Vermont 0 1 3 0 1 5 - - - - - - 5 -
Virginia 20 344 1,425 414 184 2,387 - - - - - - 2,387 32
Washington 47 249 1,314 498 597 2,706 - - - - - - 2,706 42
West Virginia 3 108 294 101 92 598 - - - - - - 598 1
Wisconsin 97 178 860 459 863 2,458 - - - - - - 2,458 19
Wyoming 8 15 19 5 7 54 - - - - - - 54 -
U.S. Total 4,028 15,208 33,462 11,434 12,955 77,088 2,622 1,830 2,546 798 1,033 8,829 85,917 12,229
Puerto Rico - 0 64 144 569 778 - - - - - - 778 37
Grand Total 4,028 15,209 33,526 11,579 13,524 77,866 2,622 1,830 2,546 798 1,033 8,829 86,695 12,266

 

October 17, 2025

Table HM-63
(Sheet 3 of 3)
STATE URBAN MAJOR AND MINOR COLLECTOR NOT REPORTED (4)
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 188 801 1,769 547 422 3,727 - - - - - - 3,727 144
Alaska 21 85 161 78 152 496 - - - - - - 496 13
Arizona 40 364 1,699 921 1,135 4,158 - - - - - - 4,158 1,039
Arkansas - - 1 1 1 3 15 45 413 875 309 1,657 1,660 814
California 21 71 450 106 45 694 - - - - - - 694 -
Colorado 24 209 705 429 605 1,972 1 - - - 1 1 1,973 -
Connecticut 11 156 956 479 594 2,196 2 1 4 0 - 8 2,203 -
Delaware 11 101 194 82 66 454 - - - - - - 454 7
District of Columbia - - 7 16 131 153 - - - - - - 153 1
Florida 226 2,002 4,578 1,287 1,052 9,145 133 69 52 12 9 274 9,419 30
Georgia 139 799 1,761 357 274 3,330 31 39 53 14 1 138 3,469 -
Hawaii 2 21 160 118 146 447 - - - - - - 447 3
Idaho 1 2 1 0 0 5 248 108 348 77 36 817 821 106
Illinois 74 584 2,254 1,132 1,732 5,777 - - - - - - 5,777 4
Indiana 30 38 30 1 0 99 - - - - - - 99 3,815
Iowa - - - 1 - 1 - - - - - - 1 1,419
Kansas 13 22 18 - 3 56 - - - - - - 56 2,275
Kentucky 16 181 780 282 248 1,506 - - - - - - 1,506 424
Louisiana 110 463 1,249 512 764 3,097 63 - 72 - 63 198 3,296 2
Maine 38 154 272 82 72 617 - - - - - - 617 13
Maryland 21 195 853 559 686 2,313 - - - - - - 2,313 11
Massachusetts - - 6 - - 6 - - - - - - 6 3,034
Michigan 85 328 675 234 261 1,583 498 77 530 69 1,149 2,323 3,906 101
Minnesota 276 606 2,215 602 347 4,046 - - - - - - 4,046 256
Mississippi 9 103 600 352 632 1,696 - - - - - - 1,696 47
Missouri - 164 997 689 840 2,690 - - - - - - 2,690 42
Montana 7 34 155 93 135 425 - - - - - - 425 -
Nebraska - 5 3 1 2 12 214 136 67 14 5 435 446 36
Nevada 19 151 527 226 240 1,163 - - - - - - 1,163 -
New Hampshire 37 102 253 85 104 581 - - 0 - - 0 581 -
New Jersey 1 6 3 1 44 55 1,050 611 1,429 44 21 3,155 3,210 0
New Mexico 28 72 441 212 393 1,145 - - - - - - 1,145 34
New York 60 856 2,216 1,056 1,419 5,607 - - - - - - 5,607 56
North Carolina 3 310 1,809 519 353 2,995 - - - - - - 2,995 21
North Dakota 0 32 156 90 163 442 - - - - - - 442 -
Ohio 229 1,093 2,539 1,043 1,039 5,942 - - - - - - 5,942 104
Oklahoma 12 27 17 5 4 64 - - - - - - 64 1,513
Oregon 2 38 22 3 24 88 1,103 715 515 99 34 2,466 2,554 12
Pennsylvania 5 205 1,874 1,035 1,260 4,379 - - - - - - 4,379 594
Rhode Island 6 19 217 135 217 593 - - - - - - 593 10
South Carolina 49 584 1,707 677 575 3,593 - - - - - - 3,593 7
South Dakota 2 9 77 63 119 271 - - - - - - 271 56
Tennessee 29 77 57 4 3 170 - - - - - - 170 0
Texas 270 2,116 6,099 2,967 4,935 16,387 - - - - - - 16,387 608
Utah 2 76 436 292 508 1,314 - - - - - - 1,314 7
Vermont - - 2 1 3 5 - - - - - - 5 0
Virginia 20 308 1,941 884 508 3,660 - - - - - - 3,660 164
Washington 15 181 1,094 695 915 2,900 - - - - - - 2,900 181
West Virginia 1 61 295 165 213 735 - - - - - - 735 2
Wisconsin 26 209 867 448 1,107 2,656 - - - - - - 2,656 16
Wyoming 0 17 6 0 0 24 - - - - - - 24 -
U.S. Total 2,178 14,037 45,205 19,565 24,491 105,476 3,357 1,800 3,484 1,205 1,626 11,471 116,947 17,021
Puerto Rico - 0 76 168 651 896 - - - - - - 896 30
Grand Total 2,178 14,037 45,281 19,733 25,142 106,372 3,357 1,800 3,484 1,205 1,626 11,471 117,843 17,052

(1) Some States elect to report International Roughness Index (IRI) for these systems; some report IRI for some sections and PSR for some sections. PSR is ignored for sections coded with both IRI and PSR. Some differences from other tables may be noted because these are estimated from sample data. Excludes unpaved mileage. Includes structures.

(2) Data are reported as the IRI in inches per mile. Reference: World Bank Technical Paper Number 46, 1986. Lower IRI represents smoother riding roadways; to obtain a comprehensive assessment of pavement condition, additional measures of pavement distress are needed.

(3) The "Present Serviceability Rating" (PSR) is a subjective, primarily ride-based system adapted from the "AASHO ROAD TESTS" conducted in the late 1950's and early 1960's. Reference: Highway Special Report 61E, 1962. The PSR values range from 0.1 to 5.0; higher PSR values represent smoother riding roadways.

(4) Includes unpaved miles or bridges.

(5) Substantial amount of missing IRI data; caution is advised when used in analysis.

 

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