Highway Statistics Series
Highway Statistics 2020
FEDERAL-AID LENGTH - 2020
MILES BY MEASURED PAVEMENT ROUGHNESS / PRESENT SERVICEABILITY RATING
NOVEMBER, 2020
| STATE | INTERNATIONAL ROUGHNESS INDEX (IRI) / PRESENT SERVICEABILITY RATING (PSR)(1) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RURAL | URBAN | TOTAL | |||||||||||||
| NOT REPORTED(2) | IRI: <95 PSR: >3.4 |
IRI: 95-170 PSR: 2.6-3.4 |
IRI: >170 PSR: <2.6 |
TOTAL REPORTED | NOT REPORTED(2) | IRI: <95 PSR: >3.4 |
IRI: 95-170 PSR: 2.6-3.4 |
IRI: >170 PSR: <2.6 |
TOTAL REPORTED | NOT REPORTED(2) | IRI: <95 PSR: >3.4 |
IRI: 95-170 PSR: 2.6-3.4 |
IRI: >170 PSR: <2.6 |
TOTAL REPORTED | |
| Alabama | 6 | 11,907 | 5,401 | 906 | 18,214 | 23 | 3,227 | 2,996 | 1,457 | 7,681 | 29 | 15,134 | 8,398 | 2,363 | 25,894 |
| Alaska | 378 | 1,271 | 933 | 530 | 2,734 | 181 | 341 | 242 | 130 | 712 | 559 | 1,612 | 1,175 | 660 | 3,446 |
| Arizona | 135 | 3,545 | 2,994 | 928 | 7,467 | 755 | 1,641 | 4,209 | 2,677 | 8,527 | 890 | 5,186 | 7,203 | 3,605 | 15,994 |
| Arkansas | 33 | 4,842 | 6,372 | 5,610 | 16,824 | 14 | 1,522 | 2,642 | 948 | 5,111 | 48 | 6,364 | 9,013 | 6,558 | 21,935 |
| California | 64 | 6,677 | 3,862 | 1,439 | 11,978 | 551 | 2,521 | 4,631 | 7,276 | 14,428 | 615 | 9,199 | 8,492 | 8,715 | 26,407 |
| Colorado | - | 4,568 | 4,774 | 1,595 | 10,937 | - | 1,167 | 2,233 | 1,976 | 5,375 | - | 5,735 | 7,007 | 3,571 | 16,312 |
| Connecticut | - | 338 | 642 | 281 | 1,260 | 15 | 1,017 | 2,252 | 1,796 | 5,065 | 15 | 1,355 | 2,894 | 2,077 | 6,326 |
| Delaware | 3 | 373 | 202 | 31 | 606 | 3 | 380 | 376 | 227 | 984 | 6 | 753 | 578 | 259 | 1,590 |
| District of Columbia | - | - | - | - | - | 1 | 8 | 31 | 413 | 452 | 1 | 8 | 31 | 413 | 452 |
| Florida | 150 | 6,789 | 2,403 | 385 | 9,577 | 76 | 8,078 | 6,903 | 2,859 | 17,841 | 226 | 14,867 | 9,306 | 3,245 | 27,417 |
| Georgia | - | 11,978 | 6,460 | 848 | 19,285 | 6 | 6,080 | 5,003 | 1,433 | 12,517 | 6 | 18,058 | 11,463 | 2,281 | 31,802 |
| Hawaii | 8 | 136 | 245 | 166 | 546 | 16 | 143 | 401 | 453 | 997 | 24 | 279 | 646 | 618 | 1,543 |
| Idaho | 4,465 | 3,136 | 832 | 393 | 4,361 | 1,371 | 324 | 140 | 88 | 552 | 5,835 | 3,460 | 972 | 481 | 4,914 |
| Illinois | 39 | 9,120 | 6,824 | 1,405 | 17,349 | 210 | 3,393 | 5,586 | 4,737 | 13,716 | 250 | 12,513 | 12,409 | 6,142 | 31,065 |
| Indiana | 1,126 | 7,710 | 4,284 | 1,731 | 13,726 | 719 | 2,855 | 3,598 | 2,387 | 8,841 | 1,845 | 10,566 | 7,883 | 4,118 | 22,567 |
| Iowa | 16,852 | 2,573 | 1,191 | 240 | 4,003 | 2,940 | 422 | 445 | 214 | 1,081 | 19,792 | 2,995 | 1,635 | 454 | 5,084 |
| Kansas | 6,678 | 9,895 | 2,958 | 458 | 13,310 | 295 | 898 | 1,492 | 1,509 | 3,899 | 6,973 | 10,793 | 4,449 | 1,967 | 17,209 |
| Kentucky | 301 | 5,115 | 4,595 | 530 | 10,241 | 1,323 | 1,086 | 1,244 | 433 | 2,762 | 1,624 | 6,201 | 5,839 | 963 | 13,003 |
| Louisiana | 18 | 3,620 | 3,489 | 1,268 | 8,377 | 110 | 1,707 | 2,597 | 2,173 | 6,477 | 128 | 5,327 | 6,086 | 3,441 | 14,854 |
| Maine | 121 | 2,270 | 1,867 | 1,030 | 5,167 | 25 | 366 | 416 | 254 | 1,036 | 147 | 2,636 | 2,282 | 1,284 | 6,202 |
| Maryland | - | 1,600 | 759 | 180 | 2,539 | 23 | 1,541 | 1,997 | 2,084 | 5,622 | 23 | 3,141 | 2,756 | 2,264 | 8,161 |
| Massachusetts | 488 | 368 | 380 | 107 | 854 | 5,536 | 1,249 | 1,728 | 1,309 | 4,286 | 6,024 | 1,617 | 2,107 | 1,416 | 5,140 |
| Michigan | 84 | 11,707 | 6,868 | 2,789 | 21,364 | 210 | 2,855 | 4,476 | 4,385 | 11,716 | 293 | 14,561 | 11,344 | 7,174 | 33,080 |
| Minnesota | 39 | 14,974 | 8,654 | 1,960 | 25,588 | 17 | 3,027 | 2,610 | 1,052 | 6,689 | 56 | 18,001 | 11,264 | 3,012 | 32,277 |
| Mississippi | - | 5,718 | 7,904 | 4,215 | 17,837 | 7 | 968 | 1,503 | 1,477 | 3,948 | 7 | 6,686 | 9,407 | 5,692 | 21,785 |
| Missouri | - | 8,007 | 11,159 | 4,924 | 24,090 | - | 1,687 | 2,436 | 2,555 | 6,677 | - | 9,693 | 13,594 | 7,479 | 30,767 |
| Montana | - | 6,550 | 3,878 | 1,157 | 11,585 | - | 310 | 334 | 451 | 1,095 | - | 6,860 | 4,211 | 1,609 | 12,680 |
| Nebraska | 7 | 7,218 | 1,910 | 535 | 9,663 | 10 | 186 | 193 | 191 | 571 | 17 | 7,405 | 2,103 | 726 | 10,234 |
| Nevada | - | 2,943 | 1,524 | 361 | 4,828 | 26 | 873 | 1,075 | 713 | 2,661 | 26 | 3,815 | 2,600 | 1,074 | 7,489 |
| New Hampshire | - | 1,226 | 640 | 274 | 2,141 | - | 561 | 501 | 352 | 1,413 | - | 1,787 | 1,141 | 626 | 3,554 |
| New Jersey | - | 596 | 655 | 71 | 1,322 | - | 2,801 | 3,103 | 3,689 | 9,593 | - | 3,397 | 3,758 | 3,760 | 10,915 |
| New Mexico | - | 3,326 | 3,089 | 2,970 | 9,386 | 2 | 558 | 1,028 | 1,160 | 2,746 | 2 | 3,885 | 4,117 | 4,130 | 12,132 |
| New York | 43 | 6,601 | 4,184 | 618 | 11,404 | 265 | 3,145 | 6,089 | 6,428 | 15,661 | 308 | 9,746 | 10,273 | 7,046 | 27,065 |
| North Carolina | 384 | 6,784 | 5,195 | 741 | 12,720 | 255 | 3,293 | 5,235 | 1,662 | 10,191 | 639 | 10,077 | 10,430 | 2,403 | 22,911 |
| North Dakota | - | 9,604 | 3,156 | 460 | 13,219 | 1 | 204 | 301 | 367 | 873 | 1 | 9,808 | 3,457 | 827 | 14,092 |
| Ohio | 510 | 11,492 | 3,411 | 758 | 15,661 | 54 | 4,849 | 5,110 | 3,916 | 13,876 | 564 | 16,341 | 8,521 | 4,675 | 29,537 |
| Oklahoma | 10,524 | 7,008 | 5,294 | 725 | 13,027 | 3,840 | 764 | 454 | 191 | 1,409 | 14,363 | 7,772 | 5,748 | 917 | 14,436 |
| Oregon | 34 | 8,040 | 3,490 | 1,041 | 12,571 | 20 | 3,216 | 1,441 | 401 | 5,058 | 54 | 11,256 | 4,931 | 1,442 | 17,629 |
| Pennsylvania | 245 | 6,110 | 5,658 | 2,596 | 14,363 | 466 | 2,946 | 5,544 | 5,147 | 13,638 | 711 | 9,056 | 11,202 | 7,743 | 28,001 |
| Rhode Island | - | 92 | 160 | 118 | 369 | 17 | 176 | 479 | 722 | 1,377 | 18 | 268 | 639 | 840 | 1,746 |
| South Carolina | 5,698 | 5,182 | 3,711 | 538 | 9,431 | 3,332 | 1,036 | 1,231 | 498 | 2,765 | 9,030 | 6,218 | 4,942 | 1,036 | 12,196 |
| South Dakota | 141 | 7,043 | 5,167 | 1,541 | 13,752 | 2 | 178 | 372 | 444 | 994 | 144 | 7,221 | 5,539 | 1,985 | 14,745 |
| Tennessee | 203 | 2,126 | 340 | 46 | 2,512 | 125 | 1,850 | 656 | 239 | 2,745 | 328 | 3,976 | 995 | 285 | 5,256 |
| Texas | 486 | 22,622 | 26,249 | 6,807 | 55,678 | 588 | 7,817 | 12,583 | 13,191 | 33,591 | 1,074 | 30,439 | 38,832 | 19,998 | 89,269 |
| Utah | - | 3,211 | 2,435 | 669 | 6,315 | 7 | 818 | 1,170 | 1,244 | 3,231 | 7 | 4,028 | 3,605 | 1,913 | 9,546 |
| Vermont | 68 | 1,439 | 1,137 | 594 | 3,170 | 23 | 248 | 225 | 134 | 607 | 91 | 1,688 | 1,361 | 728 | 3,777 |
| Virginia | 3,438 | 4,661 | 4,402 | 835 | 9,898 | 2,737 | 1,534 | 2,399 | 1,146 | 5,079 | 6,174 | 6,196 | 6,801 | 1,981 | 14,977 |
| Washington | 528 | 3,266 | 6,021 | 2,603 | 11,891 | 340 | 1,551 | 3,100 | 2,945 | 7,596 | 868 | 4,818 | 9,121 | 5,548 | 19,487 |
| West Virginia | 36 | 2,084 | 3,551 | 2,477 | 8,112 | 39 | 603 | 848 | 759 | 2,209 | 76 | 2,687 | 4,399 | 3,235 | 10,321 |
| Wisconsin | 573 | 9,543 | 6,972 | 3,316 | 19,831 | 340 | 1,201 | 2,948 | 3,661 | 7,810 | 913 | 10,744 | 9,920 | 6,977 | 27,641 |
| Wyoming | 55 | 4,400 | 1,600 | 321 | 6,321 | 39 | 305 | 175 | 73 | 552 | 94 | 4,704 | 1,775 | 394 | 6,873 |
| U.S. Total | 53,962 | 281,403 | 199,879 | 66,123 | 547,405 | 26,957 | 89,529 | 118,778 | 96,025 | 304,332 | 80,919 | 370,932 | 318,657 | 162,148 | 851,738 |
| Puerto Rico | 12 | 18 | 73 | 355 | 446 | 26 | 64 | 322 | 1,282 | 1,668 | 38 | 82 | 395 | 1,637 | 2,115 |
| Grand Total | 53,974 | 281,422 | 199,952 | 66,478 | 547,852 | 26,983 | 89,592 | 119,100 | 97,308 | 306,001 | 80,957 | 371,014 | 319,052 | 163,786 | 853,852 |
- 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. 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.
- May include sections entirely on structures.