U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000

Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedInInstagram

Policy and Governmental Affairs
Office of Highway Policy Information

FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2024 / Table HM-47B

Highway Statistics Series

Highway Statistics 2024


Download Excel Version [44 KB]
Printable PDF Version [147 KB]

NATIONAL HIGHWAY SYSTEM LENGTH - 2024
MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

NOVEMBER 2025

Table HM-47B
(Sheet 1 of 2)
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
INTERSTATE SYSTEM OTHER TOTAL
NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED
Alabama 4 520 36 9 565 11 1,734 245 27 2,005 15 2,253 281 36 2,570
Alaska 0 536 354 108 998 279 356 200 149 705 280 892 554 257 1,703
Arizona 1 764 137 32 933 3 713 392 108 1,213 4 1,476 529 140 2,145
Arkansas - 364 57 9 430 47 1,353 439 61 1,853 47 1,717 497 69 2,283
California - 836 290 73 1,200 31 2,516 1,308 262 4,086 31 3,352 1,598 335 5,285
Colorado - 363 208 48 619 - 1,609 780 138 2,527 - 1,971 988 187 3,146
Connecticut - 28 1 0 30 - 88 59 9 156 - 116 60 9 185
Delaware - - - - - 13 120 22 1 143 13 120 22 1 143
District of Columbia - - - - - - - - - - - - - - -
Florida - 630 29 2 661 2 2,285 359 29 2,672 2 2,915 388 31 3,333
Georgia - 582 61 6 649 - 2,995 654 40 3,689 - 3,578 715 45 4,338
Hawaii - 1 4 0 6 1 28 31 9 69 1 30 36 9 74
Idaho 0 454 57 5 517 0 1,171 488 60 1,719 0 1,625 545 66 2,236
Illinois - 1,095 115 18 1,228 1 1,505 760 185 2,449 1 2,600 875 202 3,677
Indiana 4 647 151 26 823 5 1,369 359 37 1,765 10 2,016 510 63 2,589
Iowa - 484 102 11 597 7 1,967 1,171 219 3,358 7 2,451 1,273 231 3,955
Kansas 0 551 69 3 624 2 2,667 292 36 2,995 3 3,219 361 39 3,619
Kentucky 2 671 64 7 741 1 1,341 205 13 1,558 3 2,011 268 20 2,299
Louisiana 5 309 194 21 523 18 500 475 121 1,095 22 808 668 142 1,618
Maine 0 243 13 1 256 3 640 109 36 785 3 883 122 36 1,041
Maryland 0 117 17 2 136 2 395 56 10 460 2 511 73 12 596
Massachusetts - 49 4 1 53 0 272 112 17 402 0 321 116 18 455
Michigan 4 465 63 12 540 8 2,090 298 45 2,433 12 2,554 361 57 2,973
Minnesota - 503 64 2 569 - 2,462 852 105 3,419 - 2,965 916 107 3,989
Mississippi - 492 64 12 567 - 1,250 479 95 1,824 - 1,742 543 107 2,392
Missouri - 763 65 13 841 0 2,409 500 49 2,958 0 3,172 565 63 3,799
Montana - 971 123 11 1,105 - 1,898 790 94 2,783 - 2,869 913 106 3,888
Nebraska - 369 37 5 410 0 2,018 587 73 2,678 0 2,387 624 78 3,089
Nevada - 443 12 1 456 - 1,372 182 13 1,566 - 1,814 193 14 2,022
New Hampshire - 121 8 0 129 - 338 39 6 382 - 458 47 6 511
New Jersey - 37 7 1 45 - 183 46 9 238 - 220 54 9 283
New Mexico 0 650 136 39 825 0 1,124 479 91 1,695 0 1,774 615 130 2,520
New York 14 680 115 14 809 42 1,500 654 92 2,247 56 2,180 769 106 3,056
North Carolina 0 748 50 9 808 8 1,873 676 52 2,600 9 2,621 726 61 3,408
North Dakota - 456 46 3 505 - 2,450 444 48 2,942 - 2,906 490 51 3,447
Ohio - 550 67 7 624 1 1,458 364 41 1,862 1 2,008 431 47 2,485
Oklahoma 12 553 86 12 652 67 1,432 667 138 2,238 80 1,986 753 151 2,890
Oregon - 459 48 3 509 0 1,990 624 58 2,673 0 2,449 672 61 3,182
Pennsylvania - 997 135 25 1,156 - 1,498 592 89 2,180 - 2,495 727 114 3,336
Rhode Island - 15 1 - 15 1 46 30 18 95 1 61 31 18 110
South Carolina 1 407 49 6 462 4 987 403 43 1,434 5 1,395 453 49 1,896
South Dakota - 557 32 2 591 3 2,229 594 64 2,886 3 2,786 626 66 3,477
Tennessee 2 643 30 5 678 189 1,326 324 69 1,720 191 1,969 354 74 2,398
Texas 14 1,640 292 21 1,953 64 6,090 2,069 175 8,334 78 7,730 2,361 196 10,287
Utah - 601 76 3 680 18 802 336 22 1,159 18 1,403 411 26 1,840
Vermont 1 248 17 3 268 1 244 57 12 313 1 492 74 15 580
Virginia - 450 47 5 502 - 1,077 523 44 1,643 - 1,527 570 49 2,146
Washington - 303 79 26 407 1 1,144 662 99 1,905 1 1,447 741 125 2,313
West Virginia 0 311 52 7 371 1 584 425 79 1,088 1 896 476 87 1,459
Wisconsin 0 421 96 8 525 9 2,179 929 190 3,298 9 2,600 1,025 198 3,823
Wyoming - 705 91 10 807 55 1,561 337 15 1,913 55 2,266 428 26 2,720
U.S. Total 64 24,803 3,948 647 29,398 901 71,233 23,480 3,497 98,211 965 96,036 27,428 4,145 127,609
Puerto Rico 0 21 23 17 61 0 8 36 29 72 0 29 59 45 133
Grand Total 65 24,824 3,971 664 29,459 901 71,241 23,516 3,526 98,283 966 96,065 27,487 4,190 127,742

NATIONAL HIGHWAY SYSTEM LENGTH - 2023
MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

NOVEMBER 2025

Table HM-47B
(Sheet 2 of 2)
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
INTERSTATE SYSTEM OTHER TOTAL
NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED
Alabama 1 370 51 13 434 22 927 269 61 1,257 23 1,297 320 74 1,691
Alaska - 65 15 1 82 1 76 64 24 164 1 142 80 25 246
Arizona 2 199 28 6 233 12 359 318 138 815 14 558 346 144 1,048
Arkansas - 258 65 16 338 42 379 207 103 688 42 637 271 118 1,026
California 0 674 476 105 1,255 57 1,377 2,863 3,712 7,951 57 2,051 3,338 3,817 9,206
Colorado - 193 116 24 333 - 487 618 321 1,426 - 680 735 345 1,759
Connecticut - 263 48 6 317 1 404 406 148 959 1 667 454 154 1,276
Delaware 0 26 12 2 41 15 147 76 25 248 15 173 88 27 289
District of Columbia 1 2 6 3 11 4 2 17 101 119 5 4 23 103 130
Florida - 736 89 9 834 17 3,134 1,232 294 4,660 17 3,870 1,321 303 5,494
Georgia - 500 88 9 598 - 1,532 640 142 2,315 - 2,033 729 152 2,913
Hawaii - 18 23 9 49 4 108 127 91 327 4 126 150 100 376
Idaho 0 82 11 2 95 6 135 86 39 259 6 217 96 41 354
Illinois - 738 173 46 958 2 1,034 1,291 792 3,116 2 1,771 1,464 838 4,074
Indiana 6 341 123 23 487 21 406 185 43 634 27 748 308 66 1,121
Iowa 1 130 54 7 191 4 336 458 201 995 5 466 513 208 1,186
Kansas 3 198 45 7 250 24 302 143 58 503 27 500 188 65 753
Kentucky 2 194 47 12 253 45 438 216 58 712 47 632 263 70 965
Louisiana 3 215 147 52 414 63 335 402 331 1,067 66 550 549 382 1,481
Maine 0 101 8 1 109 3 83 47 28 158 4 184 54 29 268
Maryland 0 268 65 25 358 7 548 332 314 1,194 7 816 397 339 1,552
Massachusetts - 441 57 16 513 75 652 864 778 2,294 75 1,093 921 794 2,807
Michigan 1 511 141 42 694 481 907 903 487 2,297 483 1,418 1,044 529 2,991
Minnesota - 269 69 6 344 0 605 277 46 927 0 873 346 52 1,271
Mississippi - 211 40 14 264 - 453 353 188 994 - 664 392 202 1,258
Missouri 0 435 89 19 544 2 743 448 192 1,383 2 1,178 537 212 1,927
Montana - 78 8 2 87 - 96 75 39 210 - 174 83 41 297
Nebraska - 53 20 1 73 6 137 168 168 472 6 190 188 169 546
Nevada - 144 32 3 179 - 215 140 48 403 - 359 172 51 583
New Hampshire - 94 2 - 96 - 220 77 31 328 - 314 79 31 425
New Jersey - 301 65 21 387 0 991 706 601 2,298 0 1,292 771 621 2,685
New Mexico - 133 31 11 174 0 191 159 85 436 0 324 190 96 610
New York 42 582 246 93 921 157 1,041 1,483 1,378 3,902 199 1,623 1,729 1,471 4,823
North Carolina 0 530 79 16 625 23 719 802 217 1,737 23 1,248 880 233 2,362
North Dakota - 54 12 0 66 2 92 78 37 207 2 146 90 37 273
Ohio 1 763 162 32 957 5 1,038 782 431 2,251 6 1,801 944 463 3,208
Oklahoma 9 211 82 16 308 16 281 257 102 640 26 492 339 117 948
Oregon - 187 28 6 220 5 369 358 187 914 5 556 386 193 1,134
Pennsylvania - 523 140 46 708 0 983 1,358 799 3,141 0 1,506 1,498 845 3,849
Rhode Island - 49 5 0 55 10 101 141 160 402 10 150 146 161 457
South Carolina 6 319 53 10 382 6 663 521 123 1,307 12 981 574 134 1,689
South Dakota - 70 16 2 88 10 50 65 31 146 10 121 81 32 234
Tennessee 0 469 42 10 521 274 1,044 437 144 1,625 275 1,514 479 153 2,146
Texas 11 939 492 69 1,500 135 2,621 2,550 1,335 6,506 146 3,560 3,043 1,404 8,006
Utah - 183 73 7 263 27 423 230 51 705 27 606 303 58 967
Vermont - 44 8 0 52 3 41 25 14 80 3 85 33 14 132
Virginia - 473 117 27 617 0 733 839 304 1,876 0 1,206 956 331 2,492
Washington - 257 83 16 356 15 605 715 551 1,870 15 862 798 567 2,227
West Virginia 0 140 37 7 185 2 147 146 52 345 2 287 184 59 530
Wisconsin - 223 118 12 353 20 439 721 614 1,774 20 662 839 626 2,127
Wyoming - 75 23 8 106 6 95 54 25 174 6 170 78 33 280
U.S. Total 91 14,330 4,061 886 19,278 1,634 29,246 25,726 16,241 71,213 1,725 43,576 29,788 17,127 90,491
Puerto Rico 2 57 97 68 222 10 23 139 249 411 12 80 236 317 633
Grand Total 92 14,388 4,158 954 19,500 1,644 29,269 25,865 16,490 71,624 1,736 43,656 30,024 17,444 91,124

(1) Data are reported as the International Roughness Index (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.

(2) May include sections entirely on structures and unpaved miles.

Return to top

Page last modified on January 12, 2026
Privacy Policy | Freedom of Information Act (FOIA) | Accessibility | Web Policies & Notices | No Fear Act | Report Waste, Fraud and Abuse | U.S. DOT Home | USA.gov | WhiteHouse.gov

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000