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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2023 / Table HM-64 - Highway Statistics 2023

Highway Statistics Series

Highway Statistics 2023


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Functional System Length - 2023

November 19, 2024

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-64 (Sheet 1 of 4)
STATE INTERSTATE
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 0 466 56 20 12 7 4 3 3 570
Alaska - 189 356 167 104 77 47 27 35 1,001
Arizona 2 528 204 66 41 27 15 12 21 913
Arkansas - 255 124 31 17 8 5 2 3 445
California 1 281 404 148 99 56 31 20 27 1,065
Colorado - 68 324 121 55 34 19 14 14 648
Connecticut - 22 6 1 0 - - - 0 30
Delaware - - - - - - - - - -
District of Columbia - - - - - - - - - -
Florida 4 586 101 15 6 3 1 0 0 713
Georgia - 338 147 31 11 6 2 1 1 538
Hawaii - - - - - - - - - -
Idaho 1 310 156 28 15 6 3 1 2 521
Illinois - 809 280 73 32 19 8 4 4 1,228
Indiana 0 460 185 50 27 14 7 4 5 752
Iowa - 271 231 60 27 11 5 2 3 611
Kansas 0 425 142 43 19 6 2 1 1 639
Kentucky 2 519 124 30 19 9 4 2 2 710
Louisiana 4 173 135 91 61 40 16 6 3 524
Maine - 231 41 5 2 1 0 0 0 279
Maryland - 67 55 11 5 2 0 1 1 142
Massachusetts - 44 13 2 1 1 1 0 1 63
Michigan 20 282 186 29 20 14 7 3 3 542
Minnesota - 289 223 39 13 6 2 1 0 574
Mississippi - 354 151 34 18 11 6 2 2 578
Missouri - 640 135 32 15 10 5 2 3 841
Montana - 559 412 74 32 12 4 1 11 1,105
Nebraska - 218 157 23 9 5 2 0 0 415
Nevada - 409 29 8 5 2 1 1 1 457
New Hampshire - 104 16 6 2 0 0 0 - 129
New Jersey - 20 18 4 1 1 0 0 0 45
New Mexico 0 496 194 66 40 24 11 7 6 844
New York 8 372 282 69 36 21 8 5 4 798
North Carolina 4 571 178 27 13 6 4 2 3 803
North Dakota - 320 152 22 11 2 1 1 1 510
Ohio 1 420 153 39 16 8 3 2 1 642
Oklahoma 7 296 264 44 17 10 5 3 2 642
Oregon 0 302 146 27 11 5 2 1 0 495
Pennsylvania - 583 324 73 38 20 11 7 11 1,066
Rhode Island - 15 2 0 0 0 - - 0 18
South Carolina 463 - - - - - - - - -
South Dakota - 327 232 20 7 4 1 1 0 591
Tennessee 0 529 75 19 13 5 2 1 1 644
Texas 1 827 826 193 68 31 11 6 3 1,965
Utah - 389 215 53 18 6 2 0 1 685
Vermont 0 181 55 10 6 2 1 1 1 255
Virginia - 270 190 31 9 4 2 1 0 507
Washington - 209 108 36 25 11 7 6 4 407
West Virginia - 134 136 23 13 7 3 2 1 320
Wisconsin 2 300 119 54 20 10 4 1 1 510
Wyoming - 526 168 57 32 13 6 4 2 807
U.S. Total 521 15,983 8,230 2,107 1,061 576 282 162 187 28,588
Puerto Rico 4 3 15 9 4 3 2 3 11 50
Grand Total 525 15,986 8,245 2,116 1,065 580 284 164 198 28,638

November 19, 2024

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-64 (Sheet 2 of 4)
STATE OTHER FREEWAYS & EXPRESSWAYS OTHER PRINCIPAL ARTERIAL MINOR ARTERIAL (3)
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama - - - - - - - - - - 15 1,094 671 146 62 26 10 7 5 2,022 416 761 2,003 582 155 45 30 4 11 3,590
Alaska - - - - - - - - - - 278 114 166 50 41 38 27 24 60 521 105 28 77 55 59 47 25 14 20 326
Arizona 0 9 6 2 1 - 0 - 0 19 13 320 425 204 128 81 39 25 25 1,246 0 232 745 462 319 207 93 68 61 2,187
Arkansas - 9 41 18 2 1 1 0 0 72 0 558 764 269 150 74 32 17 17 1,881 29 352 1,424 553 386 188 46 37 46 3,032
California 0 119 172 60 30 11 7 3 5 407 106 706 1,380 548 290 168 75 43 64 3,275 1,103 638 1,631 958 658 443 254 204 342 5,129
Colorado - 7 10 3 5 2 1 0 0 28 - 560 1,118 424 217 116 59 37 36 2,569 321 151 920 645 516 367 199 143 209 3,150
Connecticut - 21 12 1 0 0 - - - 34 - 9 48 33 17 7 4 3 2 122 - 9 75 43 31 31 13 8 4 214
Delaware 0 13 13 2 1 0 0 0 0 29 2 31 50 13 3 1 0 0 0 98 0 21 46 13 7 1 1 0 0 89
District of Columbia - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Florida - 149 34 3 2 1 0 - - 187 2 1,280 946 238 90 42 16 6 8 2,626 0 711 964 333 116 43 9 12 5 2,192
Georgia - - - - - - - - - - - 1,010 978 271 108 42 12 5 5 2,431 0 953 2,206 853 400 172 45 18 21 4,666
Hawaii - - - - - - - - - - 1 6 28 18 9 7 4 2 3 77 0 45 74 35 28 25 18 11 20 257
Idaho 0 30 21 4 2 0 - 0 - 58 24 629 683 192 89 42 19 11 11 1,677 150 305 618 163 101 61 35 14 23 1,320
Illinois - 21 10 9 6 3 1 0 1 52 0 699 774 365 237 140 76 46 60 2,397 - 1,993 1,259 642 411 252 104 76 49 4,787
Indiana 0 72 40 19 10 5 1 1 0 148 37 1,017 592 161 76 37 13 7 4 1,907 402 626 744 232 67 28 11 7 5 1,721
Iowa - - - - - - - - - - 27 868 1,105 608 369 218 108 69 64 3,409 3,902 - - - - - - - - -
Kansas 0 207 153 27 9 3 1 1 0 401 1 1,422 915 159 66 37 15 7 10 2,631 25 1,581 1,673 504 232 115 77 20 33 4,236
Kentucky 0 278 95 13 7 3 2 1 0 398 11 554 445 138 50 24 12 4 7 1,234 36 329 845 605 286 109 59 24 35 2,292
Louisiana - 3 8 6 6 3 2 1 6 34 1 112 362 209 131 87 48 30 29 1,009 10 159 553 393 315 211 127 70 69 1,897
Maine - 1 1 - 0 - - - 0 3 0 372 270 63 31 20 13 8 16 792 0 236 339 132 76 57 34 25 42 941
Maryland 0 35 29 3 1 1 0 0 1 69 1 149 124 26 9 6 2 2 3 321 - 233 356 85 23 9 5 0 2 713
Massachusetts 0 8 2 0 0 - 0 0 0 10 - 39 44 12 6 3 1 1 1 105 - 65 114 47 38 24 6 4 4 300
Michigan 8 217 93 13 3 3 3 2 4 338 21 1,121 676 174 72 32 14 8 12 2,110 116 1,323 2,027 717 359 151 66 51 75 4,770
Minnesota - 18 15 3 1 1 0 0 - 40 8 1,201 1,217 477 220 115 54 31 24 3,338 - 3,100 2,020 802 245 143 84 48 121 6,563
Mississippi - - - - - - - - - - 0 510 687 251 147 96 48 26 27 1,792 0 564 1,355 636 435 315 197 130 120 3,752
Missouri - 627 361 68 27 9 4 1 1 1,100 1 669 760 249 104 45 20 11 9 1,867 1 193 1,226 1,188 769 355 143 66 56 3,996
Montana - - - - - - - - - - - 737 1,239 444 194 86 40 20 26 2,786 - 542 1,323 511 253 125 67 29 21 2,871
Nebraska 0 71 141 70 37 18 8 3 2 348 1 685 783 315 204 121 59 43 50 2,260 76 1,735 1,254 535 262 174 63 52 68 4,143
Nevada - - - - - - - - - - 0 937 407 104 43 17 7 2 3 1,520 - 118 338 181 55 18 6 4 2 723
New Hampshire - 18 1 - - - - - - 20 0 169 95 25 10 4 3 3 2 309 - 185 212 90 32 29 24 23 21 615
New Jersey - 25 9 1 0 0 - - - 35 - 62 63 15 7 5 2 1 2 157 - 71 119 52 28 20 6 4 7 307
New Mexico - - - - - - - - - - 1 570 697 286 161 94 48 28 31 1,915 5 300 533 315 258 206 139 127 382 2,261
New York 0 30 80 33 18 12 6 3 2 183 35 329 1,080 335 159 85 37 22 20 2,068 5 295 1,412 541 303 127 42 48 54 2,822
North Carolina 16 261 178 34 12 8 5 3 2 503 10 465 906 339 137 52 19 10 13 1,942 12 195 1,437 925 506 241 149 81 99 3,632
North Dakota - - - - - - - - - - - 1,351 1,106 274 112 45 19 13 26 2,946 - 738 1,177 350 146 64 20 15 17 2,526
Ohio 0 160 94 42 22 11 4 2 1 335 1 543 644 195 82 38 16 9 6 1,533 0 742 1,409 315 107 35 17 16 13 2,653
Oklahoma 0 5 7 2 1 0 0 - - 15 20 544 857 369 206 109 51 34 49 2,219 27 356 1,097 497 281 181 106 55 71 2,645
Oregon - - - - - - - - - - 1 724 1,293 362 143 64 28 19 24 2,657 75 217 983 472 248 120 43 25 36 2,145
Pennsylvania 1 125 153 42 22 10 6 3 7 370 4 348 798 284 141 61 33 20 29 1,715 - 390 1,425 1,037 722 305 163 151 200 4,393
Rhode Island 0 6 3 1 0 0 - - - 10 0 10 16 12 18 16 11 7 6 96 1 9 17 11 8 8 7 5 6 71
South Carolina 1 12 10 1 1 0 1 0 - 26 4 290 679 226 115 54 22 13 10 1,408 1 203 1,123 671 365 246 119 64 48 2,840
South Dakota - 143 103 33 8 3 1 0 0 291 - 899 1,073 339 153 65 28 17 17 2,591 1 903 1,005 478 279 145 79 42 29 2,960
Tennessee - 9 12 3 1 - 0 0 - 26 204 676 628 168 93 56 28 15 16 1,680 2,835 - - - - 2 - 0 1 4
Texas 36 25 56 22 6 3 1 1 0 113 51 2,987 3,437 1,339 626 265 104 53 39 8,851 15 1,862 3,610 1,930 1,223 743 231 118 133 9,850
Utah - 1 5 2 1 1 0 - - 9 0 289 516 214 105 45 12 5 5 1,191 45 192 390 267 179 112 53 29 27 1,248
Vermont - - 0 0 0 0 - - - 1 1 113 140 35 16 10 5 3 7 329 - - - - - - - - - -
Virginia 0 20 31 7 2 1 0 0 0 61 8 240 801 309 133 55 22 9 7 1,576 182 122 1,389 1,003 515 198 64 30 13 3,334
Washington - 168 224 120 49 16 10 10 12 610 9 237 542 268 130 59 28 13 13 1,291 27 233 631 443 291 210 96 58 82 2,044
West Virginia - - 0 - - - 0 0 0 0 21 103 440 219 131 64 35 19 17 1,027 812 4 132 170 129 53 26 7 11 532
Wisconsin 1 74 50 33 27 13 5 1 2 203 11 1,150 733 417 263 144 78 45 57 2,887 - 1,933 857 621 452 308 162 134 279 4,745
Wyoming - - - - - - - - - - 56 743 818 225 84 29 8 4 3 1,914 66 226 540 225 76 45 18 11 21 1,161
U.S. Total 65 2,997 2,272 700 319 142 70 38 48 6,586 990 30,250 35,022 12,418 6,190 3,145 1,460 856 981 90,323 10,801 26,175 45,708 22,317 12,750 7,114 3,382 2,186 3,013 122,646
Puerto Rico - - 0 0 0 0 0 - 0 2 0 - 4 11 12 11 7 6 14 66 0 - - 1 4 13 20 25 191 255
Grand Total 65 2,997 2,273 700 320 143 70 38 48 6,588 990 30,250 35,026 12,430 6,203 3,157 1,467 862 994 90,389 10,802 26,175 45,708 22,317 12,754 7,127 3,403 2,211 3,205 122,901

November 19, 2024

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-64 (Sheet 3 of 4)
STATE INTERSTATE
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 1 309 58 23 17 9 5 4 7 432
Alaska - 30 32 10 4 2 1 - 0 79
Arizona 6 139 63 18 10 7 3 2 2 243
Arkansas - 145 91 36 21 13 7 4 6 323
California 0 235 395 216 167 107 58 34 35 1,247
Colorado - 53 108 56 40 24 10 7 6 304
Connecticut - 149 116 28 13 5 3 1 1 317
Delaware 0 13 13 6 3 2 1 1 1 40
District of Columbia 8 - 1 1 0 1 0 0 0 4
Florida 6 496 185 42 24 16 6 2 1 772
Georgia - 421 173 59 28 16 6 3 2 709
Hawaii - 5 14 11 8 8 5 3 1 55
Idaho 0 46 35 6 2 2 1 1 - 92
Illinois - 417 327 84 48 37 19 10 15 958
Indiana 2 257 128 45 29 18 8 4 3 492
Iowa 2 46 68 30 15 8 4 2 2 175
Kansas 3 133 52 23 13 7 3 2 1 234
Kentucky 0 117 59 24 13 9 6 2 3 232
Louisiana 3 128 84 52 48 46 28 13 16 414
Maine - 59 21 5 1 1 1 - 0 87
Maryland 0 125 131 31 15 10 7 5 12 336
Massachusetts 1 366 75 23 15 12 5 3 5 504
Michigan 31 237 237 65 40 28 15 9 15 645
Minnesota 2 125 138 40 18 11 3 1 2 338
Mississippi - 142 56 20 12 12 5 4 3 254
Missouri - 302 140 41 26 18 8 5 4 544
Montana - 54 23 4 3 1 0 0 1 87
Nebraska - 18 33 12 4 2 1 0 0 69
Nevada - 90 32 15 13 7 2 2 1 162
New Hampshire - 83 11 1 0 0 0 - - 96
New Jersey - 177 127 31 16 12 9 6 9 387
New Mexico - 83 41 11 8 5 2 3 2 155
New York 15 218 362 121 80 51 28 20 33 912
North Carolina 13 326 186 49 22 12 7 5 4 611
North Dakota - 23 29 6 3 1 0 0 - 61
Ohio 1 483 272 82 46 25 14 8 6 937
Oklahoma 1 77 113 43 20 13 7 4 5 282
Oregon - 107 87 18 10 6 4 1 1 234
Pennsylvania - 345 254 81 44 29 17 11 17 797
Rhode Island 0 42 5 2 1 1 0 0 0 52
South Carolina 388 - - - - - - - - -
South Dakota - 21 46 12 5 2 1 0 - 88
Tennessee 0 398 96 31 14 8 4 2 3 557
Texas 6 369 587 240 156 86 40 17 11 1,505
Utah 0 77 102 40 17 11 4 2 1 253
Vermont 0 38 18 5 3 1 0 0 0 64
Virginia - 214 253 75 33 18 8 5 3 610
Washington 0 138 125 47 22 12 5 4 4 356
West Virginia - 91 90 23 15 9 4 3 2 236
Wisconsin 4 97 122 59 44 23 10 5 3 362
Wyoming - 46 30 10 7 5 4 2 2 106
U.S. Total 495 8,108 5,844 2,015 1,216 767 387 221 253 18,811
Puerto Rico 6 5 48 46 35 28 18 15 30 225
Grand Total 501 8,113 5,891 2,061 1,251 795 405 237 283 19,035

November 19, 2024

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-64 (Sheet 4 of 4)
STATE OTHER FREEWAYS & EXPRESSWAYS OTHER PRINCIPAL ARTERIAL
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 2 13 16 5 4 3 1 0 0 42 15 454 486 149 78 42 23 15 22 1,270
Alaska - - - - - - - - - - 0 24 43 25 17 10 6 5 9 139
Arizona 5 114 79 27 16 6 3 1 2 248 178 49 140 128 119 87 61 40 55 680
Arkansas - 19 43 17 8 4 2 2 2 97 16 103 215 92 60 43 27 18 64 623
California 5 253 482 269 199 126 61 37 47 1,474 343 132 482 581 758 860 741 696 2,033 6,283
Colorado - 54 127 59 37 22 12 7 8 325 - 59 239 195 175 123 78 60 138 1,068
Connecticut 0 85 106 29 13 7 3 1 2 246 1 21 198 157 121 76 47 33 58 710
Delaware 0 6 21 6 3 1 1 0 0 39 3 35 89 31 19 12 7 5 10 209
District of Columbia 1 1 1 1 2 2 2 1 4 15 2 - 0 1 3 6 8 10 75 104
Florida 2 311 197 50 24 12 6 4 3 607 7 961 1,602 626 329 183 97 60 98 3,956
Georgia - 85 44 20 14 9 3 1 1 176 - 642 980 346 176 92 51 25 41 2,355
Hawaii 0 2 9 5 4 4 3 2 4 34 2 28 63 39 32 32 22 14 37 266
Idaho 0 12 9 2 1 1 1 0 0 26 82 60 116 49 31 24 14 12 40 346
Illinois - 36 27 15 12 9 6 4 5 114 2 300 662 495 407 300 199 149 330 2,841
Indiana 16 49 41 19 13 7 3 1 1 134 628 356 388 138 82 61 32 20 22 1,099
Iowa - - - - - - - - - - 19 97 207 187 141 90 57 44 83 906
Kansas 4 75 67 23 14 8 3 2 1 192 22 61 80 34 29 23 17 11 21 276
Kentucky 2 26 12 11 6 3 1 1 1 62 36 150 218 105 55 30 18 12 22 610
Louisiana 2 6 12 9 15 21 19 11 22 115 90 95 194 137 114 99 72 63 159 932
Maine - 7 6 1 1 0 0 0 0 16 1 30 32 14 13 12 8 6 15 129
Maryland 0 103 132 31 14 10 7 4 9 310 7 151 268 127 98 77 59 54 175 1,010
Massachusetts 2 204 71 17 11 7 5 4 4 323 37 87 317 287 275 251 182 153 382 1,933
Michigan 15 113 133 43 21 10 5 4 8 337 493 170 417 344 273 202 135 110 220 1,871
Minnesota - 57 89 45 18 9 3 1 1 223 3 196 244 107 64 33 18 10 12 683
Mississippi - 19 21 8 6 5 2 1 1 64 3 131 261 162 116 85 50 39 101 946
Missouri 0 197 178 61 34 22 12 7 8 518 5 130 266 148 101 78 51 40 74 888
Montana - - - - - - - - - - 0 36 68 36 29 22 16 13 23 243
Nebraska 0 12 49 24 13 11 7 5 6 128 11 11 46 38 40 33 29 28 89 314
Nevada - 28 12 6 5 2 1 0 1 55 0 113 99 56 36 30 14 12 18 377
New Hampshire - 48 11 2 1 0 0 - 0 62 0 73 88 30 22 12 6 5 8 244
New Jersey - 227 127 35 23 16 10 6 8 453 0 201 441 234 209 184 136 112 278 1,795
New Mexico - 1 1 3 2 3 1 0 0 12 6 79 163 105 94 74 51 38 93 698
New York 27 64 234 131 93 73 55 53 80 782 100 92 675 476 373 291 203 194 755 3,058
North Carolina 26 99 116 36 16 9 5 3 3 287 7 101 451 397 291 191 95 63 91 1,680
North Dakota - - - - - - - - - - 6 31 56 34 27 18 12 10 18 207
Ohio 4 192 230 71 44 23 11 7 7 585 27 213 630 405 325 244 166 132 308 2,424
Oklahoma 7 39 90 29 20 10 6 4 3 201 410 61 213 143 98 76 47 40 85 763
Oregon 0 28 24 8 4 1 1 1 0 68 14 106 236 148 111 79 52 37 73 843
Pennsylvania 3 125 196 97 59 33 19 11 20 561 11 192 655 501 447 357 236 172 389 2,950
Rhode Island 2 31 26 8 7 4 2 0 2 79 6 14 32 33 47 46 38 34 91 336
South Carolina 2 44 32 12 6 4 1 1 1 100 13 148 431 232 162 101 53 31 33 1,191
South Dakota 3 1 9 5 2 1 1 0 0 19 - 12 31 24 19 17 11 9 10 134
Tennessee 0 86 45 17 13 9 4 2 3 179 133 478 613 247 164 104 63 46 89 1,804
Texas 23 247 545 298 184 101 47 20 15 1,456 64 579 1,502 954 693 521 370 304 766 5,688
Utah - 23 19 10 3 1 1 0 0 57 8 126 246 118 74 46 23 16 24 672
Vermont 0 4 6 3 1 1 - 0 0 15 4 21 37 21 14 8 7 5 11 124
Virginia - 76 209 61 29 10 8 3 2 397 1 53 382 280 239 186 112 79 84 1,415
Washington 2 127 188 55 29 15 8 6 6 434 33 55 237 221 216 181 131 107 271 1,419
West Virginia - 1 5 2 3 2 2 0 0 14 10 41 149 81 48 32 17 12 13 391
Wisconsin 1 73 97 66 47 37 14 5 4 343 50 109 262 267 287 267 193 155 370 1,910
Wyoming - 2 0 0 0 - 0 0 - 3 38 43 60 27 18 15 10 6 13 193
U.S. Total 155 3,424 4,194 1,755 1,096 671 364 227 296 12,028 2,949 7,511 16,011 9,813 7,771 6,067 4,172 3,364 8,299 63,008
Puerto Rico 1 1 12 7 6 6 4 5 10 51 6 0 8 24 40 52 47 46 141 359
Grand Total 157 3,425 4,206 1,761 1,102 677 368 233 306 12,079 2,956 7,511 16,018 9,837 7,811 6,118 4,220 3,411 8,441 63,367

(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. Includes structures.

(2) Includes unpaved miles and bridges.

(3) Estimated from sample data.

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