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 / 2020 / Table HM-63 - Highway Statistics 2020

Highway Statistics Series

Highway Statistics 2020


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

Functional System Length - 2020 (1)
    Miles by Measured Pavement Roughness / Present Serviceability Rating

October 26, 2021

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 1,270 5,060 4,524 499 332 11,685 - - - - - - 11,685 -
Alaska 79 295 327 97 149 947 - - - - - - 947 29
Arizona 302 735 1,487 369 251 3,144 - - - - - - 3,144 73
Arkansas - - - - - - 982 732 4,442 4,981 263 11,400 11,400 -
California 945 715 1,013 176 542 3,391 - - - - - - 3,391 -
Colorado 228 1,163 2,174 520 421 4,506 - - - - - - 4,506 -
Connecticut 2 133 472 109 137 853 - 1 2 - - 3 856 -
Delaware 72 122 166 18 9 388 - - - - - - 388 2
District of Columbia - - - - - - - - - - - - - -
Florida 591 1,230 1,365 190 147 3,524 205 11 280 2 - 499 4,023 -
Georgia 913 5,116 4,934 461 170 11,594 - - - - - - 11,594 -
Hawaii - 11 100 49 53 213 - - - - - - 213 7
Idaho 159 320 201 42 70 793 - - - - - - 793 4,290
Illinois 976 3,597 3,562 565 276 8,975 - - - - - - 8,975 39
Indiana 877 3,059 3,329 920 692 8,877 - - - - - - 8,877 990
Iowa - - 4 - 2 6 - - - - - - 6 12,906
Kansas 1,044 2,305 1,680 264 93 5,386 - - - - - - 5,386 6,675
Kentucky 217 1,683 3,260 318 121 5,599 - - - - - - 5,599 257
Louisiana 221 1,707 2,019 379 580 4,906 3 - 14 - 6 23 4,929 5
Maine 264 710 1,399 429 387 3,189 - - - - - - 3,189 83
Maryland 232 371 538 97 62 1,300 - - - - - - 1,300 -
Massachusetts - 44 253 19 54 370 - - - - - - 370 488
Michigan 1,701 4,090 5,177 1,292 1,187 13,447 66 - 1 9 5 82 13,529 43
Minnesota 2,497 5,478 5,400 668 800 14,844 - - - - - - 14,844 38
Mississippi 170 1,780 6,001 2,108 1,661 11,720 - - - - - - 11,720 -
Missouri 122 2,887 8,628 2,900 1,679 16,216 - - 13 - - 13 16,229 -
Montana 584 1,420 2,019 436 408 4,868 - - - - - - 4,868 -
Nebraska 966 698 537 144 135 2,480 - - - - - - 2,480 -
Nevada 139 519 1,136 222 110 2,126 - - - - - - 2,126 -
New Hampshire 108 323 411 115 84 1,041 - - - - - - 1,041 -
New Jersey - 17 374 34 - 425 116 137 97 - - 350 775 -
New Mexico 135 320 1,673 1,117 1,107 4,351 - - - - - - 4,351 -
New York 220 2,634 2,397 282 11 5,543 - - - - - - 5,543 -
North Carolina 206 2,961 3,607 291 176 7,241 - - - - - - 7,241 192
North Dakota 1,494 3,185 2,263 184 114 7,239 - - - - - - 7,239 -
Ohio 2,450 4,069 2,420 396 199 9,533 1,241 176 - 54 - 1,472 11,005 -
Oklahoma 418 3,010 3,719 346 122 7,615 - - - - - - 7,615 10,450
Oregon 64 286 722 334 210 1,617 2,414 1,700 1,187 163 144 5,608 7,225 -
Pennsylvania 225 1,730 2,869 998 1,098 6,920 - - - - - - 6,920 243
Rhode Island 4 14 74 41 38 171 - - - - - - 171 -
South Carolina 178 1,832 1,997 242 82 4,330 - - - - - - 4,330 5,675
South Dakota 548 1,672 3,512 1,056 276 7,063 359 21 2 4 9 395 7,458 -
Tennessee - - - - - - - - - - - - - -
Texas 529 8,526 19,587 3,496 2,541 34,680 - - - - - - 34,680 453
Utah 291 906 1,401 328 214 3,139 - - - - - - 3,139 -
Vermont 129 469 792 219 249 1,857 - - - - - - 1,857 60
Virginia 68 936 2,257 494 237 3,991 - - - - - - 3,991 3,421
Washington 25 943 4,327 1,535 678 7,509 - - - - - - 7,509 495
West Virginia 48 760 2,440 956 1,298 5,502 - - - - - - 5,502 22
Wisconsin 2,002 3,104 4,052 1,230 1,172 11,559 - - - - - - 11,559 493
Wyoming 408 1,126 780 156 103 2,574 - - - - - - 2,574 -
U.S. Total 24,120 84,072 123,379 27,141 20,538 279,250 5,385 2,778 6,040 5,213 428 19,845 299,095 47,433
Puerto Rico - - 10 19 154 183 - - - - - - 183 10
Grand Total 24,120 84,072 123,389 27,160 20,691 279,433 5,385 2,778 6,040 5,213 428 19,845 299,278 47,443

 

October 26, 2021

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 220 781 936 180 143 2,261 - - - - - - 2,261 3
Alaska 24 74 62 14 13 187 - - - - - - 187 11
Arizona 78 352 1,387 426 201 2,444 - - - - - - 2,444 91
Arkansas - 18 20 1 2 41 251 234 961 336 7 1,789 1,830 -
California 127 324 880 688 1,003 3,022 - - - - - - 3,022 -
Colorado 27 233 769 354 422 1,804 1 - - - - 1 1,805 -
Connecticut 13 244 817 284 297 1,656 2 6 7 1 - 16 1,672 1
Delaware 27 57 89 24 24 222 - - - - - - 222 -
District of Columbia - - 8 13 142 164 - - - - - - 164 -
Florida 341 1,365 1,588 318 245 3,858 168 89 96 10 11 374 4,232 -
Georgia 552 1,595 2,114 341 224 4,826 - - - - - - 4,826 -
Hawaii 5 27 80 33 44 190 - - - - - - 190 2
Idaho 12 23 27 4 7 73 - - - - - - 73 584
Illinois 140 786 1,777 659 767 4,129 - - - - - - 4,129 13
Indiana 286 679 1,161 386 303 2,815 - - - - - - 2,815 227
Iowa - - 1 - 1 2 - - - - - - 2 1,661
Kansas 38 158 558 234 208 1,196 - - - - - - 1,196 159
Kentucky 97 340 597 110 70 1,214 - - - - - - 1,214 143
Louisiana 70 390 752 232 252 1,697 17 - 13 - 14 43 1,740 11
Maine 22 68 97 26 30 243 - - - - - - 243 4
Maryland 76 264 653 252 317 1,562 - - - - - - 1,562 11
Massachusetts 32 187 606 254 209 1,288 - - - - - - 1,288 2,690
Michigan 161 824 1,899 782 1,005 4,669 4 4 11 3 39 60 4,730 102
Minnesota 510 888 860 164 126 2,548 - - - - - - 2,548 7
Mississippi 51 171 475 194 202 1,093 - - - - - - 1,093 -
Missouri 62 271 889 432 468 2,123 - - 23 - - 23 2,145 -
Montana 16 77 108 37 52 291 - - - - - - 291 -
Nebraska 13 3 15 5 10 46 - - - - - - 46 -
Nevada 93 217 375 105 98 888 - - - - - - 888 4
New Hampshire 32 140 196 60 62 490 - - 1 - - 1 491 -
New Jersey 115 155 672 576 657 2,175 542 287 503 111 12 1,455 3,630 -
New Mexico 6 64 295 150 198 712 - - - - - - 712 -
New York 140 717 2,309 571 1,500 5,237 - - - - - - 5,237 64
North Carolina 26 839 1,888 353 205 3,311 - - - - - - 3,311 98
North Dakota 7 41 126 52 68 294 - - - - - - 294 -
Ohio 222 957 1,397 494 627 3,696 125 42 75 - 28 270 3,966 -
Oklahoma 60 57 26 11 4 158 - - - - - - 158 1,970
Oregon 10 45 68 28 13 164 513 304 292 14 1 1,124 1,288 -
Pennsylvania 134 679 1,754 593 647 3,807 - - - - - - 3,807 252
Rhode Island 5 34 135 73 85 331 - - - - - - 331 9
South Carolina 27 263 555 110 54 1,009 - - - - - - 1,009 759
South Dakota 6 31 181 115 89 421 2 5 3 - - 11 432 -
Tennessee 41 41 27 8 13 129 - - - - - - 129 -
Texas 243 1,116 3,081 1,444 2,046 7,930 - - - - - - 7,930 92
Utah 12 103 306 97 150 668 - - - - - - 668 -
Vermont 2 58 62 13 9 144 - - - - - - 144 4
Virginia 21 300 977 302 155 1,756 - - - - - - 1,756 518
Washington 46 399 1,244 420 493 2,602 - - - - - - 2,602 168
West Virginia 15 150 324 82 108 678 - - - - - - 678 11
Wisconsin 44 233 885 507 800 2,469 - - - - - - 2,469 131
Wyoming 8 33 45 14 14 114 - - - - - - 114 -
U.S. Total 4,313 16,872 36,151 12,628 14,882 84,846 1,625 971 1,986 476 110 5,169 90,015 9,802
Puerto Rico - 1 70 133 355 560 - - - - - - 560 4
Grand Total 4,313 16,873 36,221 12,761 15,237 85,406 1,625 971 1,986 476 110 5,169 90,574 9,805

 

October 26, 2021

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 125 777 1,717 524 521 3,664 - - - - - - 3,664 7
Alaska 20 90 111 42 44 307 - - - - - - 307 170
Arizona 76 536 2,417 1,043 864 4,935 - - - - - - 4,935 453
Arkansas - 3 3 - - 7 219 276 1,298 417 32 2,242 2,249 -
California 10 115 756 422 1,277 2,580 - - - - - - 2,580 -
Colorado 33 184 764 403 489 1,872 - - - - 2 2 1,875 -
Connecticut 1 109 968 446 598 2,121 1 2 10 - - 13 2,134 -
Delaware 10 117 193 78 71 470 - - - - - - 470 2
District of Columbia - - 3 15 137 155 - - - - - - 155 -
Florida 180 1,553 3,606 1,013 941 7,294 381 241 352 30 45 1,048 8,342 -
Georgia 273 1,308 2,146 419 291 4,437 - - - - - - 4,437 -
Hawaii 1 12 149 115 166 444 - - - - - - 444 5
Idaho - 2 4 1 - 7 - - - - - - 7 714
Illinois 93 688 2,302 1,078 1,473 5,633 - - - - - - 5,633 196
Indiana 147 483 1,639 741 653 3,662 - - - - - - 3,662 461
Iowa - - - - 3 3 - - - - - - 3 1,253
Kansas 36 192 741 322 674 1,964 - - - - - - 1,964 134
Kentucky 9 80 360 94 91 634 - - - - - - 634 1,148
Louisiana 154 496 1,184 496 728 3,058 51 - 74 - 69 194 3,252 19
Maine 24 114 261 81 90 569 - - - - - - 569 11
Maryland 28 258 913 467 722 2,388 - - - - - - 2,388 7
Massachusetts - 5 227 3 - 234 - - - - - - 234 2,803
Michigan 67 512 1,284 636 992 3,491 15 7 15 39 69 145 3,636 70
Minnesota 244 590 1,434 371 341 2,980 - - - - - - 2,980 5
Mississippi 4 94 604 342 542 1,585 - - - - - - 1,585 7
Missouri 1 146 996 565 897 2,605 - 11 13 - - 24 2,629 -
Montana 9 31 118 96 195 450 - - - - - - 450 -
Nebraska 1 - 4 2 2 9 - - - - - - 9 1
Nevada 31 174 517 227 231 1,179 - - - - - - 1,179 21
New Hampshire 13 93 232 81 121 540 - - 1 - - 1 541 -
New Jersey 5 41 353 475 949 1,823 348 160 767 190 36 1,501 3,324 -
New Mexico 19 110 423 217 397 1,165 - - - - - - 1,165 -
New York 45 607 2,053 1,367 1,567 5,639 - - - - - - 5,639 65
North Carolina 8 580 2,247 487 358 3,679 - - - - - - 3,679 108
North Dakota 2 14 86 52 157 311 - - - - - - 311 -
Ohio 292 1,109 2,166 763 1,100 5,430 60 109 245 60 84 558 5,989 -
Oklahoma 17 14 12 - 1 43 - - - - - - 43 1,418
Oregon 5 29 39 10 12 95 1,068 662 638 127 35 2,531 2,626 -
Pennsylvania 46 361 2,159 1,288 1,758 5,611 - - - - - - 5,611 207
Rhode Island - 10 193 140 232 575 - - - - - - 575 2
South Carolina 5 25 125 87 103 346 - - - - - - 346 2,529
South Dakota - 14 97 108 96 315 4 - 1 1 - 6 320 -
Tennessee 2 22 18 1 3 45 - - - - - - 45 -
Texas 500 2,086 6,144 3,145 4,774 16,650 - - - - - - 16,650 404
Utah 12 102 559 361 570 1,605 - - - - - - 1,605 -
Vermont 4 55 108 39 54 259 - - - - - - 259 16
Virginia 2 120 557 265 142 1,086 - - - - - - 1,086 2,216
Washington 10 200 1,075 645 900 2,831 - - - - - - 2,831 136
West Virginia 2 71 319 161 333 886 - - - - - - 886 23
Wisconsin 20 251 853 545 1,076 2,745 - - - - - - 2,745 139
Wyoming 32 65 34 5 3 139 - - - - - - 139 -
U.S. Total 2,616 14,647 45,268 20,285 27,741 110,557 2,147 1,468 3,415 864 372 8,267 118,823 14,749
Puerto Rico - - 29 84 346 459 - - - - - - 459 8
Grand Total 2,616 14,647 45,297 20,369 28,087 111,016 2,147 1,468 3,415 864 372 8,267 119,282 14,757

(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.

 

Return to top

Page last modified on December 20, 2021
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