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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2023 / Table HM-63 - Highway Statistics 2023

Highway Statistics Series

Highway Statistics 2023


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Functional System Length - 2023 (1)
    Miles by Measured Pavement Roughness / Present Serviceability Rating

December 10, 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 1,375 3,670 3,367 435 217 9,064 - - - - - - 9,064 3,165
Alaska 58 292 330 95 151 926 - - - - - - 926 86
Arizona 281 748 1,651 341 234 3,254 - - - - - - 3,254 90
Arkansas 727 2,982 3,445 1,434 977 9,565 215 136 514 1,079 74 2,018 11,582 11
California 315 860 1,694 542 1,031 4,441 - - - - - - 4,441 -
Colorado 265 1,027 1,975 615 530 4,412 - - - - - - 4,412 -
Connecticut 16 170 501 90 70 847 - - 0 - - 0 847 -
Delaware 37 134 188 20 9 389 - - - - - - 389 2
District of Columbia - - - - - - - - - - - - - -
Florida 527 1,564 1,527 272 106 3,996 - 2 26 0 - 29 4,025 -
Georgia 1,229 4,551 4,930 588 242 11,540 - - - - - - 11,540 -
Hawaii 0 16 97 45 62 220 - - - - - - 220 0
Idaho 133 340 215 54 53 795 - - - - - - 795 4,332
Illinois 1,815 3,723 2,982 466 118 9,104 - - - - - - 9,104 -
Indiana 514 719 704 33 19 1,989 - - - - - - 1,989 7,195
Iowa - - - - - - - - - - - - - 12,801
Kansas 1,060 2,123 1,381 173 87 4,824 - - - - - - 4,824 7,868
Kentucky 274 1,602 3,325 337 118 5,655 - - - - - - 5,655 214
Louisiana 295 1,440 1,962 515 674 4,886 10 - 3 - 9 21 4,907 4
Maine 318 932 1,315 372 313 3,250 - - - - - - 3,250 3
Maryland 159 416 553 114 61 1,303 - - - - - - 1,303 -
Massachusetts 17 115 174 22 3 332 - - - - - - 332 511
Michigan 2,272 3,660 4,639 1,258 1,004 12,833 25 3 408 35 118 589 13,422 124
Minnesota 3,093 4,545 5,557 1,066 570 14,831 - - - - - - 14,831 0
Mississippi 143 1,513 5,687 2,388 1,919 11,650 - - - - - - 11,650 13
Missouri 382 2,442 8,796 3,071 1,523 16,214 - - - - - - 16,214 2
Montana 449 1,646 2,136 452 343 5,027 - - - - - - 5,027 62
Nebraska 565 846 656 163 37 2,267 1,016 725 203 - - 1,944 4,211 1,257
Nevada 82 471 1,232 218 126 2,128 - - - - - - 2,128 -
New Hampshire 124 307 425 116 102 1,074 - - 0 - - 0 1,074 -
New Jersey - - - - - - 345 58 368 - - 771 771 -
New Mexico 66 306 1,822 1,119 1,009 4,322 - - - - - - 4,322 28
New York 330 2,692 2,149 247 155 5,572 - - - - - - 5,572 10
North Carolina 140 1,870 5,242 529 287 8,068 - - - - - - 8,068 15
North Dakota 1,215 3,508 2,187 329 133 7,371 - 50 - - - 50 7,421 -
Ohio 1,499 5,521 3,418 362 213 11,014 - - - - - - 11,014 39
Oklahoma 912 3,645 6,224 2,673 2,523 15,978 - - - - - - 15,978 2,571
Oregon 81 443 903 322 218 1,968 2,472 1,165 971 350 120 5,079 7,047 -
Pennsylvania 168 1,612 2,739 1,052 1,126 6,697 - - - - - - 6,697 344
Rhode Island 4 28 68 38 24 163 - - - - - - 163 0
South Carolina 374 2,670 4,062 1,294 807 9,207 - - - - - - 9,207 94
South Dakota 637 1,199 1,350 194 44 3,423 5 4,028 - - - 4,034 7,457 23
Tennessee - - - - - - - - - - - - - -
Texas 1,313 7,564 19,342 3,479 2,582 34,280 - - - - - - 34,280 325
Utah 216 791 969 209 152 2,337 - - - - - - 2,337 10
Vermont - - - - - - - - - - - - - -
Virginia 4 1,075 3,533 1,043 550 6,205 - - - - - - 6,205 1,066
Washington 37 879 4,312 1,691 523 7,442 - - - - - - 7,442 562
West Virginia 11 191 226 20 2 449 - - - - - - 449 -
Wisconsin 1,873 2,543 2,687 949 1,112 9,165 - - - - - - 9,165 1,953
Wyoming 425 783 550 148 48 1,953 - - - - - - 1,953 -
U.S. Total 25,828 80,175 123,226 30,998 22,204 282,432 4,090 6,167 2,493 1,464 320 14,535 296,966 44,783
Puerto Rico - 2 24 47 254 327 - - - - - - 327 5
Grand Total 25,828 80,177 123,250 31,045 22,459 282,759 4,090 6,167 2,493 1,464 320 14,535 297,294 44,788

 

December 10, 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 246 616 748 167 98 1,875 - - - - - - 1,875 443
Alaska 20 58 78 23 22 201 - - - - - - 201 0
Arizona 60 290 1,385 472 309 2,516 - - - - - - 2,516 19
Arkansas 142 217 308 57 62 787 132 209 549 103 5 997 1,784 27
California 174 475 696 321 448 2,113 - - - - - - 2,113 -
Colorado 30 242 810 331 389 1,802 - - - - - - 1,802 -
Connecticut 23 291 862 262 237 1,675 0 1 0 - - 1 1,676 -
Delaware 21 54 92 30 22 219 - - - - - - 219 4
District of Columbia - 0 12 21 125 158 - - - - - - 158 0
Florida 400 1,369 1,740 361 294 4,165 11 29 8 0 - 48 4,212 13
Georgia 515 1,738 1,829 239 177 4,498 - - - - - - 4,498 -
Hawaii 6 34 66 36 49 191 - - - - - - 191 1
Idaho 10 18 34 3 9 74 - - - - - - 74 586
Illinois 171 624 1,784 647 894 4,120 - - - - - - 4,120 3
Indiana 257 286 146 16 9 712 - - - - - - 712 2,176
Iowa - - 1 1 1 3 - - - - - - 3 1,670
Kansas 12 34 42 14 8 110 - - - - - - 110 1,232
Kentucky 79 337 639 121 77 1,253 - - - - - - 1,253 101
Louisiana 64 356 692 266 312 1,689 17 - 16 - 11 45 1,734 1
Maine 28 73 92 24 25 243 - - - - - - 243 0
Maryland 68 247 667 292 310 1,585 - - - - - - 1,585 2
Massachusetts 31 229 660 288 213 1,420 - - - - - - 1,420 2,533
Michigan 216 680 1,145 416 514 2,971 395 214 256 227 734 1,826 4,798 95
Minnesota 344 774 1,003 181 130 2,432 - - - - - - 2,432 145
Mississippi 24 174 432 215 250 1,095 - - - - - - 1,095 2
Missouri 67 297 900 443 468 2,174 - - - - - - 2,174 4
Montana 19 62 120 37 39 277 - - - - - - 277 -
Nebraska 11 5 3 5 14 38 297 178 61 - 1 538 576 56
Nevada 97 211 388 107 86 889 - - - - - - 889 -
New Hampshire 53 115 217 57 51 494 - - - - - - 494 -
New Jersey 114 191 181 29 24 538 894 887 1,247 23 9 3,060 3,598 -
New Mexico 6 69 304 136 175 690 - - - - - - 690 19
New York 181 929 2,141 979 1,140 5,369 - - - - - - 5,369 79
North Carolina 33 496 1,665 332 202 2,728 - - - - - - 2,728 57
North Dakota 3 43 122 54 70 292 - - - - - - 292 -
Ohio 202 1,028 1,595 490 580 3,894 - - - - - - 3,894 84
Oklahoma 66 127 394 230 315 1,131 - - - - - - 1,131 1,114
Oregon 8 40 66 31 20 166 580 275 244 11 6 1,117 1,282 -
Pennsylvania 105 624 1,707 491 648 3,575 - - - - - - 3,575 404
Rhode Island 4 29 138 71 86 329 - - - - - - 329 8
South Carolina 24 393 968 223 105 1,713 - - - - - - 1,713 180
South Dakota 4 16 20 9 2 52 135 239 - - - 374 426 9
Tennessee 16 33 23 3 10 86 - - - - - - 86 -
Texas 267 1,188 3,078 1,536 2,335 8,404 - - - - - - 8,404 57
Utah 31 70 112 36 30 278 - - - - - - 278 0
Vermont - - - - - - - - - - - - - -
Virginia 17 311 1,070 307 128 1,833 - - - - - - 1,833 532
Washington 40 263 1,389 498 563 2,752 - - - - - - 2,752 22
West Virginia 1 44 109 25 13 194 - - - - - - 194 0
Wisconsin 69 178 806 437 785 2,276 - - - - - - 2,276 209
Wyoming 8 22 33 5 7 75 - - - - - - 75 -
U.S. Total 4,386 15,998 33,514 11,375 12,880 78,152 2,462 2,032 2,382 364 767 8,006 86,158 11,889
Puerto Rico - - 59 177 605 841 - - - - - - 841 14
Grand Total 4,386 15,998 33,573 11,552 13,485 78,994 2,462 2,032 2,382 364 767 8,006 86,999 11,904

 

December 10, 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 141 633 1,362 424 339 2,898 - - - - - - 2,898 964
Alaska 9 74 155 80 149 468 - - - - - - 468 12
Arizona 62 520 2,293 1,100 1,282 5,257 - - - - - - 5,257 87
Arkansas 1 37 114 60 50 262 191 275 1,320 276 28 2,091 2,352 3
California 41 112 293 62 73 581 - - - - - - 581 -
Colorado 37 225 668 405 545 1,881 - - - - 1 1 1,882 -
Connecticut 10 147 968 494 581 2,199 2 1 0 - - 2 2,201 -
Delaware 13 109 204 77 61 464 - - - - - - 464 9
District of Columbia - - 4 18 131 153 - - - - - - 153 -
Florida 193 1,716 4,029 1,121 1,025 8,084 105 55 55 8 0 223 8,307 40
Georgia 194 1,034 1,538 277 191 3,235 - - - - - - 3,235 -
Hawaii 2 21 160 118 146 448 - - - - - - 448 3
Idaho 0 2 2 - 0 5 - - - - - - 5 763
Illinois 78 594 2,238 1,111 1,732 5,754 - - - - - - 5,754 6
Indiana 40 39 28 0 0 108 - - - - - - 108 3,272
Iowa - - - 1 - 1 - - - - - - 1 1,272
Kansas 17 32 20 1 7 76 - - - - - - 76 2,051
Kentucky 11 164 631 205 166 1,177 - - - - - - 1,177 610
Louisiana 98 432 1,164 466 686 2,846 46 - 70 - 56 173 3,019 2
Maine 31 133 262 80 68 574 - - - - - - 574 1
Maryland 22 234 904 526 692 2,378 - - - - - - 2,378 1
Massachusetts - - 6 - - 6 - - - - - - 6 3,011
Michigan 90 328 682 221 256 1,577 480 246 240 321 912 2,199 3,776 47
Minnesota 258 665 2,189 451 297 3,860 - - - - - - 3,860 468
Mississippi 9 73 581 299 655 1,617 - - - - - - 1,617 5
Missouri 6 159 1,015 609 906 2,696 - - - - - - 2,696 18
Montana 5 36 133 92 147 414 - - - - - - 414 10
Nebraska 0 1 2 0 2 6 187 134 50 13 3 388 394 30
Nevada 25 181 513 232 261 1,212 - - - - - - 1,212 -
New Hampshire 33 106 248 82 112 581 - - 0 - - 0 581 -
New Jersey 5 38 40 2 40 126 878 422 1,795 64 23 3,182 3,307 1
New Mexico 23 88 450 182 368 1,111 - - - - - - 1,111 43
New York 73 826 2,257 1,191 1,304 5,651 - - - - - - 5,651 69
North Carolina 6 325 1,752 525 327 2,935 - - - - - - 2,935 15
North Dakota 12 37 112 65 153 379 - 1 - - - 1 380 -
Ohio 219 1,127 2,573 898 985 5,802 - - - - - - 5,802 170
Oklahoma 17 106 290 114 173 700 - - - - - - 700 950
Oregon 2 37 27 6 19 90 1,172 662 535 116 27 2,513 2,603 13
Pennsylvania 32 257 2,165 1,207 1,374 5,035 - - - - - - 5,035 758
Rhode Island 2 14 213 136 204 568 - - - - - - 568 7
South Carolina 41 474 1,520 549 428 3,012 - - - - - - 3,012 629
South Dakota - - - - - - 54 261 - - - 315 315 6
Tennessee 1 2 4 1 2 9 - - - - - - 9 -
Texas 307 2,040 5,951 3,058 5,345 16,701 - - - - - - 16,701 595
Utah 6 47 143 78 95 369 - - - - - - 369 0
Vermont - - - - - - - - - - - - - -
Virginia 5 193 1,228 432 197 2,055 - - - - - - 2,055 1,507
Washington 17 191 1,147 781 940 3,077 - - - - - - 3,077 56
West Virginia 1 2 23 11 18 55 - - - - - - 55 0
Wisconsin 13 183 648 362 934 2,140 - - - - - - 2,140 434
Wyoming 13 36 8 0 0 58 - - - - - - 58 -
U.S. Total 2,217 13,832 42,958 18,212 23,468 100,687 3,115 2,058 4,065 798 1,052 11,089 111,776 17,936
Puerto Rico - 0 66 169 742 978 - - - - - - 978 29
Grand Total 2,217 13,832 43,024 18,381 24,210 101,665 3,115 2,058 4,065 798 1,052 11,089 112,753 17,965

(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.

 

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