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 / 2022 / Table HM-63 - Highway Statistics 2022

Highway Statistics Series

Highway Statistics 2022


Printable Excel Version [120 KB]
Printable PDF Version [177 KB]

Functional System Length - 2022 (1)
    Miles by Measured Pavement Roughness / Present Serviceability Rating

March 05, 2024

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 613 1,361 885 36 6 2,901 - - - - - - 2,901 2
Alaska 57 295 310 101 156 918 - - - - - - 918 39
Arizona 284 784 1,545 375 233 3,220 - - - - - - 3,220 3
Arkansas - 36 84 16 - 136 1,146 726 4,770 4,493 359 11,494 11,630 -
California - 37 44 13 38 132 - - - - - - 132 -
Colorado 296 1,036 1,993 591 520 4,436 - - - - - - 4,436 -
Connecticut 17 164 469 116 95 861 - - 1 - - 1 861 -
Delaware 47 141 171 22 9 390 - - - - - - 390 0
District of Columbia - - - - - - - - - - - - - -
Florida 519 1,538 1,561 253 114 3,985 1 0 33 1 - 35 4,020 -
Georgia 1,285 4,525 4,976 605 263 11,655 - - - - - - 11,655 -
Hawaii - 11 104 47 56 218 - - - - - - 218 2
Idaho 167 339 128 26 7 667 - - - - - - 667 4,481
Illinois 910 3,748 3,566 595 214 9,034 - - - - - - 9,034 -
Indiana 1,337 2,393 1,776 83 62 5,651 - - - - - - 5,651 4,144
Iowa - - - - - - - - - - - - - 12,794
Kansas 594 2,131 1,524 236 84 4,569 - - - - - - 4,569 7,606
Kentucky 93 1,735 3,300 320 158 5,606 - - - - - - 5,606 262
Louisiana 169 1,356 1,992 605 778 4,899 4 - 16 - 7 27 4,926 0
Maine 272 828 1,343 422 380 3,244 1 1 2 1 0 5 3,248 5
Maryland 150 396 572 123 62 1,304 - - - - - - 1,304 -
Massachusetts 14 158 242 5 5 423 - - - - - - 423 435
Michigan 2,097 3,625 5,061 1,305 1,019 13,108 29 227 129 106 103 594 13,702 298
Minnesota 3,419 4,193 5,921 790 593 14,916 - - - - - - 14,916 73
Mississippi 147 1,501 5,700 2,397 1,967 11,712 - - - - - - 11,712 -
Missouri 336 2,503 8,591 3,176 1,647 16,253 - - - - - - 16,253 -
Montana 595 1,485 2,078 432 341 4,931 - - - - - - 4,931 64
Nebraska 677 771 624 192 106 2,370 21 623 128 - - 773 3,143 2,505
Nevada 113 521 1,180 211 110 2,134 - - - - - - 2,134 -
New Hampshire 147 293 406 110 86 1,041 - - 0 - - 0 1,041 0
New Jersey - - - - - - 287 77 411 - - 775 775 -
New Mexico 94 335 1,762 1,069 1,030 4,290 - - - - - - 4,290 12
New York 265 2,622 2,253 338 134 5,612 - - - - - - 5,612 12
North Carolina 184 2,132 4,523 401 193 7,433 - - - - - - 7,433 2
North Dakota 1,313 3,309 2,215 248 102 7,188 - - - - - - 7,188 47
Ohio 2,094 5,195 3,025 468 192 10,973 - - - - - - 10,973 44
Oklahoma 481 2,559 3,667 434 181 7,322 - - - - - - 7,322 11,180
Oregon 91 471 918 335 223 2,039 3,452 - 1,361 - 185 4,999 7,038 -
Pennsylvania 182 1,732 2,568 978 1,028 6,488 - - - - - - 6,488 670
Rhode Island 3 14 67 37 31 152 - - - - - - 152 19
South Carolina 441 3,229 4,317 1,257 762 10,006 - - - - - - 10,006 5
South Dakota 695 2,028 3,397 882 292 7,295 - - - - - - 7,295 426
Tennessee - 0 - - - 0 - - - - - - 0 -
Texas 483 7,207 20,945 3,580 2,542 34,757 - - - - - - 34,757 460
Utah 137 855 1,043 207 97 2,340 - - - - - - 2,340 -
Vermont - - - - - - - - - - - - - -
Virginia 57 1,128 3,556 929 508 6,179 - - - - - - 6,179 1,253
Washington 12 792 4,269 1,456 461 6,990 - - - - - - 6,990 1,091
West Virginia 29 187 137 3 - 356 - - - - - - 356 -
Wisconsin (5) 2,299 3,024 3,961 1,285 1,395 11,964 - - - - - - 11,964 31
Wyoming 429 1,236 778 111 68 2,621 - - - - - - 2,621 -
U.S. Total 23,646 75,958 119,547 27,219 18,348 264,719 4,942 1,654 6,852 4,600 655 18,702 283,421 47,967
Puerto Rico - 2 25 50 235 313 - - - - - - 313 19
Grand Total 23,646 75,960 119,573 27,269 18,583 265,031 4,942 1,654 6,852 4,600 655 18,702 283,733 47,986

 

March 05, 2024

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 209 368 151 18 5 752 - - - - - - 752 1
Alaska 14 61 78 20 17 191 - - - - - - 191 10
Arizona 73 307 1,393 451 267 2,490 - - - - - - 2,490 42
Arkansas 3 39 64 39 24 170 275 212 887 244 3 1,621 1,791 1
California 67 135 363 122 105 792 - - - - - - 792 -
Colorado 31 237 780 335 420 1,803 - - - - - - 1,803 -
Connecticut 11 251 857 272 279 1,670 0 0 2 0 - 3 1,672 -
Delaware 20 61 92 28 22 224 - - - - - - 224 0
District of Columbia - - 13 20 124 158 - - - - - - 158 0
Florida 344 1,307 1,734 420 362 4,166 8 21 16 5 1 50 4,216 -
Georgia 562 1,689 1,880 294 229 4,654 - - - - - - 4,654 -
Hawaii 6 34 69 33 49 191 - - - - - - 191 1
Idaho 10 20 25 9 5 70 - - - - - - 70 594
Illinois 154 676 1,765 676 853 4,123 - - - - - - 4,123 3
Indiana 185 215 109 20 10 538 - - - - - - 538 2,494
Iowa - - 1 1 1 3 - - - - - - 3 1,669
Kansas 6 45 46 13 13 122 - - - - - - 122 1,232
Kentucky 61 304 615 123 100 1,202 - - - - - - 1,202 155
Louisiana 65 358 726 280 367 1,796 18 - 16 - 16 50 1,846 2
Maine 25 69 93 29 25 241 0 0 1 0 0 2 243 0
Maryland 63 230 674 256 346 1,570 - - - - - - 1,570 2
Massachusetts 30 188 716 282 239 1,455 0 - 1 - - 2 1,456 2,478
Michigan 240 686 1,158 418 508 3,009 364 209 249 211 747 1,782 4,791 97
Minnesota 353 938 896 170 95 2,452 - - - - - - 2,452 40
Mississippi 24 171 432 215 255 1,097 - - - - - - 1,097 -
Missouri 45 285 881 417 507 2,136 - - - - - - 2,136 10
Montana 18 72 122 42 38 292 - - - - - - 292 -
Nebraska 12 6 5 4 13 40 154 293 153 - - 600 640 89
Nevada 99 237 335 107 108 885 - - - - - - 885 -
New Hampshire 40 139 210 58 44 491 - - - - - - 491 0
New Jersey 132 186 169 30 35 553 637 372 1,981 80 9 3,078 3,631 -
New Mexico 2 70 282 149 204 706 - - - - - - 706 1
New York 133 851 2,091 968 1,193 5,236 - - - - - - 5,236 165
North Carolina 50 717 1,930 416 276 3,389 - - - - - - 3,389 15
North Dakota 4 43 125 54 67 293 - - - - - - 293 -
Ohio 203 994 1,629 512 560 3,898 - - - - - - 3,898 76
Oklahoma 50 86 22 8 12 179 - - - - - - 179 2,040
Oregon 9 43 68 30 20 170 820 - 287 - 5 1,113 1,283 -
Pennsylvania 121 642 1,678 530 532 3,503 - - - - - - 3,503 551
Rhode Island 3 27 112 57 41 239 - - - - - - 239 99
South Carolina 21 374 1,025 228 117 1,764 - - - - - - 1,764 0
South Dakota 5 32 166 87 110 399 - - - - - - 399 35
Tennessee 10 17 24 9 14 75 - - - - - - 75 0
Texas 242 1,205 2,958 1,450 2,355 8,210 - - - - - - 8,210 291
Utah 22 101 252 87 100 562 - - - - - - 562 -
Vermont - 1 3 1 0 6 - - - - - - 6 -
Virginia 15 364 1,166 356 162 2,063 - - - - - - 2,063 185
Washington 51 362 1,289 486 547 2,735 - - - - - - 2,735 33
West Virginia 3 36 104 15 9 167 - - - - - - 167 -
Wisconsin (5) 64 217 951 460 878 2,571 - - - - - - 2,571 40
Wyoming 0 34 36 7 11 89 - - - - - - 89 -
U.S. Total 3,910 15,529 32,364 11,110 12,674 75,587 2,277 1,107 3,593 541 781 8,300 83,887 12,455
Puerto Rico - - 60 173 570 803 - - - - - - 803 17
Grand Total 3,910 15,529 32,423 11,284 13,244 76,390 2,277 1,107 3,593 541 781 8,300 84,690 12,472

 

March 05, 2024

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 73 41 17 5 2 138 - - - - - - 138 0
Alaska 10 78 146 78 132 444 - - - - - - 444 33
Arizona 60 567 2,258 1,195 1,166 5,246 - - - - - - 5,246 144
Arkansas - 5 4 1 0 10 193 288 1,455 384 28 2,348 2,358 3
California - 0 36 28 65 130 - - - - - - 130 -
Colorado 25 194 734 416 511 1,880 - - - - 2 2 1,882 -
Connecticut 6 99 892 511 629 2,137 1 0 1 0 0 2 2,139 -
Delaware 15 98 209 69 70 462 - - - - - - 462 0
District of Columbia - - 7 20 128 155 - - - - - - 155 -
Florida 170 1,659 4,021 1,126 1,223 8,199 50 52 35 9 2 148 8,347 -
Georgia 279 1,181 1,942 449 401 4,251 - - - - - - 4,251 -
Hawaii 2 20 161 120 144 447 - - - - - - 447 4
Idaho 0 2 5 1 0 9 - - - - - - 9 755
Illinois 71 605 2,300 1,137 1,715 5,828 - - - - - - 5,828 7
Indiana 45 37 30 4 0 116 - - - - - - 116 3,964
Iowa - - - 1 0 1 - - - - - - 1 1,264
Kansas 18 33 23 0 6 79 - - - - - - 79 2,037
Kentucky 7 139 501 132 86 866 - - - - - - 866 920
Louisiana 87 414 1,198 513 841 3,053 68 - 84 - 87 239 3,292 11
Maine 31 126 262 76 70 566 1 2 2 1 1 7 573 2
Maryland 21 259 842 510 757 2,389 - - - - - - 2,389 1
Massachusetts - 2 239 3 - 243 - - - - - - 243 2,788
Michigan 77 310 671 222 239 1,519 409 268 274 320 900 2,171 3,690 143
Minnesota 223 561 2,423 403 326 3,936 - - - - - - 3,936 76
Mississippi 8 68 577 303 641 1,597 - - - - - - 1,597 -
Missouri 6 146 969 594 916 2,630 - - - - - - 2,630 3
Montana 4 30 140 109 159 443 - - - - - - 443 8
Nebraska 0 1 2 0 3 7 94 182 101 - - 377 383 87
Nevada 32 192 507 220 256 1,206 - - - - - - 1,206 -
New Hampshire 25 100 235 78 101 540 - - 0 - - 0 541 -
New Jersey 5 37 41 5 40 129 449 296 2,205 225 19 3,194 3,323 0
New Mexico 18 104 440 192 392 1,145 - - - - - - 1,145 4
New York 43 698 2,219 1,220 1,319 5,499 - - - - - - 5,499 79
North Carolina 4 484 2,310 579 358 3,736 - - - - - - 3,736 60
North Dakota 8 34 113 66 154 375 - - - - - - 375 2
Ohio 212 1,140 2,573 849 1,010 5,783 - - - - - - 5,783 181
Oklahoma 15 22 10 3 0 50 - - - - - - 50 1,600
Oregon 1 35 27 5 20 89 1,763 - 697 - 51 2,511 2,600 11
Pennsylvania 35 271 2,115 1,072 1,329 4,820 - - - - - - 4,820 998
Rhode Island 2 5 67 36 23 134 - - - - - - 134 442
South Carolina 52 495 1,309 545 481 2,882 - - - - - - 2,882 16
South Dakota 5 8 89 58 132 292 - - - - - - 292 30
Tennessee 2 29 22 3 2 58 - - - - - - 58 -
Texas 396 1,989 5,836 3,185 5,308 16,715 - - - - - - 16,715 552
Utah 3 63 460 305 470 1,300 - - - - - - 1,300 0
Vermont - - 0 0 1 2 - - - - - - 2 0
Virginia 3 218 1,545 670 357 2,794 - - - - - - 2,794 522
Washington 12 179 1,120 713 938 2,962 - - - - - - 2,962 25
West Virginia - 2 4 - - 6 - - - - - - 6 -
Wisconsin (5) 23 266 889 457 1,148 2,783 - - - - - - 2,783 82
Wyoming 29 53 31 5 1 118 - - - - - - 118 -
U.S. Total 2,162 13,101 42,571 18,293 24,072 100,198 3,027 1,089 4,855 939 1,089 11,000 111,198 16,858
Puerto Rico - 0 54 161 735 950 - - - - - - 950 31
Grand Total 2,162 13,101 42,626 18,454 24,806 101,149 3,027 1,089 4,855 939 1,089 11,000 112,149 16,889

(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.

Return to top

Page last modified on March 7, 2024
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