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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2022 / Table HM-64 - Highway Statistics 2022

Highway Statistics Series

Highway Statistics 2022


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Functional System Length - 2022

January 29, 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 0 461 52 23 16 8 5 2 3 570
Alaska 1 211 363 159 103 71 36 23 34 1,001
Arizona 9 556 190 64 42 25 11 9 10 907
Arkansas - 255 116 32 19 11 6 3 5 445
California 1 449 395 151 99 56 27 16 17 1,209
Colorado - 85 311 123 52 31 17 12 16 648
Connecticut - 19 8 1 1 0 0 - 0 29
Delaware - - - - - - - - - -
District of Columbia - - - - - - - - - -
Florida 3 599 93 13 6 2 1 0 0 715
Georgia - 341 153 23 12 6 2 1 1 538
Hawaii - - - - - - - - - -
Idaho 9 327 138 28 13 5 3 1 2 516
Illinois - 805 301 75 30 18 9 4 6 1,247
Indiana 0 482 205 64 32 14 6 4 5 812
Iowa - 264 231 68 28 12 4 2 3 611
Kansas 1 412 154 42 22 6 2 1 1 639
Kentucky 1 505 136 34 18 8 5 2 1 710
Louisiana 0 186 125 91 60 41 15 6 3 527
Maine - 228 42 6 1 1 0 0 0 279
Maryland - 67 57 11 4 2 1 0 1 142
Massachusetts - 36 16 4 2 2 1 1 1 63
Michigan 4 304 170 31 24 14 7 5 4 558
Minnesota - 297 236 37 12 3 2 0 0 588
Mississippi - 361 147 32 16 11 6 2 2 578
Missouri - 634 146 36 15 9 4 2 1 847
Montana - 552 425 72 30 11 3 2 0 1,095
Nebraska 1 208 147 36 15 5 2 1 0 414
Nevada - 411 30 8 4 2 1 0 0 457
New Hampshire - 117 17 6 1 1 0 - - 142
New Jersey - 20 19 4 1 1 0 0 - 45
New Mexico 0 502 195 61 35 23 11 9 8 844
New York 8 352 275 76 42 25 10 6 11 797
North Carolina 0 447 114 16 9 4 2 1 2 595
North Dakota - 332 142 25 7 2 1 0 1 510
Ohio 0 410 158 39 18 11 4 2 2 643
Oklahoma 10 314 235 43 22 12 7 4 2 639
Oregon 0 302 144 33 8 5 2 1 1 495
Pennsylvania - 580 321 74 41 22 12 7 10 1,066
Rhode Island - 13 3 1 0 - - - - 18
South Carolina 18 349 110 32 19 11 5 2 1 529
South Dakota - 335 227 17 6 3 1 1 0 591
Tennessee 0 520 78 22 12 7 3 1 2 645
Texas 5 878 807 200 69 32 13 6 3 2,008
Utah - 380 226 53 17 5 2 1 0 685
Vermont 0 169 64 10 5 3 2 2 1 255
Virginia - 300 235 38 11 4 1 1 0 591
Washington - 215 127 37 22 11 6 5 6 429
West Virginia 1 186 91 19 10 7 3 2 1 319
Wisconsin - 291 126 54 23 10 5 2 1 512
Wyoming - 518 187 55 26 12 5 2 1 807
U.S. Total 71 16,585 8,286 2,182 1,082 581 272 154 168 29,311
Puerto Rico - 3 14 9 5 4 3 4 13 54
Grand Total 71 16,588 8,300 2,190 1,087 585 275 158 181 29,365

January 29, 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 - - - - - - - - - - 7 1,103 669 143 58 27 11 6 5 2,022 697 826 1,759 481 153 43 25 4 7 3,297
Alaska - - - - - - - - - - 278 108 166 51 44 36 28 25 62 521 105 32 81 47 53 46 25 17 25 326
Arizona 0 5 8 4 2 1 1 0 - 19 20 362 434 198 117 67 34 16 13 1,243 2 287 732 436 308 211 108 63 43 2,188
Arkansas - 14 44 13 1 1 0 - 0 72 0 465 764 297 166 89 44 24 28 1,876 30 361 1,344 656 344 171 83 30 49 3,037
California 0 125 180 59 31 13 6 5 4 422 62 767 1,402 543 290 159 76 41 64 3,342 1,421 574 1,784 953 567 419 188 132 247 4,864
Colorado - 8 9 3 5 3 0 0 0 28 - 579 1,091 425 219 120 58 38 39 2,569 300 180 912 628 538 374 206 139 195 3,173
Connecticut - 16 17 2 1 0 - - - 36 - 7 46 34 18 8 5 2 2 122 - 5 67 52 41 25 11 9 8 218
Delaware - 4 16 4 2 1 1 0 1 29 0 27 51 15 4 1 0 0 1 99 - 18 52 14 4 1 0 0 0 90
District of Columbia - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Florida - 132 37 3 2 1 0 - - 175 0 1,175 1,029 258 94 41 16 6 7 2,625 8 730 964 321 108 37 13 8 4 2,184
Georgia - - - - - - - - - - 19 1,037 963 263 95 32 10 6 5 2,412 - 971 2,305 847 320 123 48 24 25 4,662
Hawaii - - - - - - - - - - 0 5 30 18 10 6 4 2 3 78 1 46 73 35 30 28 17 12 16 257
Idaho 3 28 21 3 2 0 0 0 - 55 611 575 686 197 79 36 15 10 7 1,604 215 262 562 159 102 74 36 23 33 1,251
Illinois - 17 11 10 5 3 1 1 1 48 0 587 837 393 238 141 72 45 49 2,363 - 1,251 1,268 995 491 400 171 115 98 4,789
Indiana 0 55 46 27 12 4 1 1 0 148 42 986 599 176 88 34 14 5 4 1,907 514 555 588 217 124 79 31 18 19 1,630
Iowa - - - - - - - - - - 15 892 1,189 581 350 188 96 57 57 3,411 3,913 - - - - - - - - -
Kansas 0 194 159 29 10 5 2 2 1 401 1 1,444 883 160 67 35 16 10 13 2,628 28 1,624 1,729 445 207 102 50 35 36 4,228
Kentucky 0 277 96 12 8 3 1 1 0 398 9 610 447 112 43 18 7 4 3 1,245 20 229 1,048 536 266 131 47 23 22 2,301
Louisiana - 3 8 4 6 3 2 1 6 34 3 104 351 213 137 89 52 33 29 1,007 3 182 566 389 290 227 119 57 71 1,901
Maine - 2 1 0 0 - - - 0 3 1 362 245 74 40 28 15 10 17 791 1 214 340 122 85 58 38 29 54 940
Maryland - 37 28 2 1 0 0 0 1 69 1 150 123 25 9 5 3 1 3 321 - 235 331 84 39 11 5 5 3 713
Massachusetts - 7 3 0 0 0 - - 0 10 - 31 42 15 7 4 3 2 2 105 - 48 93 45 38 28 13 13 9 287
Michigan 3 237 80 11 4 4 4 2 2 343 1 1,188 635 159 74 35 17 9 11 2,130 121 1,246 2,125 676 355 166 67 51 81 4,766
Minnesota - 14 12 5 1 1 0 - 0 34 - 1,437 1,253 400 191 94 42 21 18 3,458 19 3,170 1,804 781 503 115 96 70 52 6,592
Mississippi - - - - - - - - - - 0 503 687 250 146 96 48 26 27 1,784 - 581 1,341 632 434 315 197 130 123 3,753
Missouri - 624 384 70 28 13 4 2 1 1,125 0 662 777 255 105 45 21 9 9 1,885 - 210 1,376 1,142 693 341 111 91 44 4,008
Montana - - - - - - - - - - - 755 1,226 434 195 83 38 19 21 2,772 - 476 1,351 505 277 143 58 21 17 2,849
Nebraska 4 81 138 59 30 12 4 3 2 328 1 825 848 267 156 90 43 27 34 2,290 116 2,054 1,188 373 217 128 63 40 55 4,117
Nevada - - - - - - - - - - - 895 460 95 43 16 6 3 1 1,520 - 113 352 169 57 18 9 6 2 725
New Hampshire - 9 1 - - - - - - 9 - 169 104 24 11 6 5 2 2 323 0 195 212 73 48 37 24 18 18 625
New Jersey - 19 12 3 1 0 - - - 35 - 66 61 14 8 5 3 2 2 160 - 75 120 48 26 19 8 4 6 307
New Mexico - - - - - - - - - - 0 590 704 276 156 90 47 25 28 1,916 18 299 539 323 251 210 146 135 348 2,250
New York 0 22 73 36 25 13 7 4 2 183 35 317 1,064 351 162 90 41 24 22 2,071 4 458 1,452 428 238 117 41 32 74 2,839
North Carolina 10 215 126 27 11 6 4 2 2 392 21 358 783 293 107 43 15 8 8 1,616 52 80 1,346 654 416 245 125 63 73 3,003
North Dakota - - - - - - - - - - - 1,351 1,050 301 132 56 23 13 19 2,946 - 805 1,211 298 130 50 14 9 11 2,527
Ohio 0 153 107 44 18 8 3 1 1 335 1 568 639 181 79 36 14 8 6 1,531 0 932 1,200 300 131 49 20 10 14 2,656
Oklahoma 0 7 5 2 1 0 0 - - 15 29 476 891 389 213 113 55 35 48 2,220 40 277 1,141 511 269 223 104 54 57 2,636
Oregon - - - - - - - - - - 1 724 1,293 362 143 64 27 19 23 2,655 72 219 991 467 247 121 44 26 37 2,152
Pennsylvania - 130 155 41 19 10 6 4 5 370 1 356 759 271 122 55 29 15 21 1,627 - 345 1,415 1,197 653 298 208 119 170 4,404
Rhode Island 0 6 3 1 0 0 - - - 10 1 10 15 13 17 16 11 7 6 96 1 9 13 10 9 10 7 7 6 71
South Carolina 1 28 12 3 1 0 1 1 - 45 6 350 724 235 121 58 24 11 11 1,535 10 290 1,274 718 345 243 69 22 14 2,976
South Dakota - 156 89 27 14 3 1 0 0 291 0 806 1,052 387 185 81 39 22 19 2,591 2 923 1,010 462 261 150 77 47 30 2,959
Tennessee - 12 11 2 1 0 - - - 26 197 728 642 167 85 49 20 14 10 1,714 2,805 - 31 12 - - 0 - - 42
Texas 6 55 61 20 7 3 1 1 0 148 42 3,033 3,463 1,352 603 265 108 48 37 8,910 1 1,849 3,859 1,846 1,277 686 274 91 86 9,967
Utah - 1 5 2 1 1 0 0 - 12 - 277 517 218 107 47 15 5 4 1,191 62 144 551 245 151 79 33 15 13 1,231
Vermont - - 0 0 0 0 - - - 1 1 97 139 38 20 12 5 4 13 329 3 129 300 113 68 49 37 15 22 732
Virginia - 28 53 11 3 1 0 0 0 97 0 259 834 317 144 54 20 11 5 1,643 1 174 1,660 1,015 466 190 54 22 13 3,594
Washington - 127 272 115 42 19 11 12 13 612 0 214 597 273 125 58 22 12 11 1,313 23 191 710 477 281 189 92 41 64 2,045
West Virginia - - 0 - - 0 0 - 0 0 35 145 380 207 122 65 34 25 26 1,004 822 14 155 161 111 41 18 10 11 521
Wisconsin - 67 57 32 27 13 4 1 1 203 12 1,028 810 439 278 158 77 45 45 2,881 - 1,622 1,014 648 429 319 246 159 314 4,752
Wyoming - - - - - - - - - - 55 642 873 244 97 36 11 6 5 1,914 165 330 466 141 71 34 13 3 5 1,063
U.S. Total 26 2,913 2,339 688 321 146 67 45 43 6,562 1,509 30,208 35,330 12,403 6,120 3,084 1,440 823 906 90,315 11,592 25,840 46,802 21,885 12,523 7,172 3,487 2,062 2,725 122,497
Puerto Rico - - 0 0 0 0 0 - - 2 0 - 4 11 12 12 7 6 13 66 1 - - 1 5 13 20 29 187 254
Grand Total 26 2,913 2,339 689 321 146 68 45 43 6,564 1,510 30,208 35,334 12,414 6,132 3,096 1,447 830 920 90,381 11,594 25,840 46,802 21,886 12,528 7,185 3,507 2,091 2,912 122,751

January 29, 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 1 312 56 23 15 9 6 5 6 432
Alaska - 30 31 11 4 2 1 - 0 79
Arizona 11 119 71 24 17 7 2 1 1 241
Arkansas - 130 96 39 23 16 8 6 6 323
California 8 244 401 219 156 101 57 30 30 1,237
Colorado - 57 103 50 42 27 12 6 7 304
Connecticut - 144 116 31 13 8 2 2 2 318
Delaware 1 12 12 6 3 2 2 1 1 40
District of Columbia 1 - 2 2 2 1 1 1 1 11
Florida 28 488 185 40 19 10 5 1 1 750
Georgia 7 427 169 58 28 15 7 2 2 709
Hawaii 0 1 11 12 10 9 6 3 2 55
Idaho 3 49 35 5 3 2 0 0 0 93
Illinois 0 378 332 89 57 37 19 13 13 938
Indiana - 235 126 64 34 19 7 3 4 492
Iowa 1 46 74 29 13 7 3 2 1 175
Kansas 3 127 57 24 13 7 4 1 1 234
Kentucky 0 114 65 22 13 9 4 2 2 233
Louisiana 3 126 83 48 50 50 28 14 15 414
Maine - 62 17 5 2 1 0 0 0 87
Maryland 0 134 125 29 16 8 6 6 12 336
Massachusetts 2 350 80 24 18 12 7 4 7 504
Michigan 2 248 247 65 43 30 17 10 14 675
Minnesota 1 119 139 33 18 10 3 2 1 324
Mississippi - 144 58 18 12 10 5 3 3 253
Missouri - 295 141 40 27 18 8 6 3 538
Montana - 55 31 6 4 2 0 0 - 98
Nebraska - 17 30 13 4 3 1 1 0 69
Nevada - 90 31 17 14 6 3 1 0 162
New Hampshire - 73 8 1 0 0 - - - 83
New Jersey - 184 116 28 21 13 9 7 9 387
New Mexico - 83 40 13 7 5 3 2 2 155
New York 20 207 351 137 81 51 33 20 35 916
North Carolina 0 448 242 59 22 11 8 4 5 799
North Dakota - 23 27 7 2 1 0 0 - 61
Ohio 2 454 275 88 50 30 15 12 11 936
Oklahoma 6 82 110 39 20 13 6 4 4 277
Oregon - 124 74 16 10 5 4 1 2 234
Pennsylvania - 342 266 76 46 25 14 10 19 797
Rhode Island 0 34 12 3 2 1 - 0 0 52
South Carolina 17 173 74 19 11 7 2 1 1 287
South Dakota - 22 48 11 4 2 1 0 0 88
Tennessee 1 379 103 36 17 11 5 3 4 556
Texas 4 379 552 234 149 84 37 17 7 1,460
Utah - 76 106 38 17 9 4 1 1 253
Vermont - 40 19 2 2 0 0 0 0 64
Virginia - 158 228 71 34 19 10 6 3 528
Washington 0 135 114 41 22 11 5 4 3 334
West Virginia 1 117 63 22 16 8 5 3 2 235
Wisconsin - 102 124 60 44 21 9 3 3 367
Wyoming - 46 30 12 7 4 3 2 2 106
U.S. Total 123 8,232 5,905 2,056 1,260 774 400 226 245 19,099
Puerto Rico 0 6 44 42 36 30 19 17 36 231
Grand Total 124 8,238 5,950 2,098 1,296 804 419 244 281 19,330

January 29, 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 0 11 12 4 3 2 1 0 0 33 128 458 453 119 60 34 18 9 12 1,163
Alaska - - - - - - - - - - 1 21 42 25 17 11 7 6 9 138
Arizona 8 116 78 22 15 10 3 1 2 246 185 58 141 129 117 88 54 38 47 673
Arkansas - 18 42 16 7 5 3 3 3 97 19 91 198 99 67 48 31 20 64 618
California 10 254 473 263 201 126 62 36 40 1,455 540 142 508 612 763 843 716 651 1,918 6,154
Colorado - 53 131 59 36 20 12 7 8 325 0 64 245 200 172 117 83 57 129 1,068
Connecticut 0 75 112 28 14 8 4 1 2 244 2 17 189 156 117 79 51 34 67 710
Delaware 0 4 16 10 5 2 1 0 1 39 1 34 85 32 20 13 8 6 13 211
District of Columbia 1 0 1 1 2 3 2 1 4 15 3 - - 1 3 7 9 12 72 104
Florida 4 299 204 50 22 14 5 3 2 600 7 941 1,584 627 331 193 106 63 104 3,950
Georgia 4 85 42 20 12 8 3 1 1 172 65 639 943 328 164 91 45 29 46 2,285
Hawaii 0 2 8 5 5 4 4 2 4 34 2 29 57 41 32 35 20 15 38 267
Idaho 0 11 10 2 2 1 1 0 0 26 214 44 83 32 21 15 8 7 11 221
Illinois - 31 34 15 12 10 6 4 6 118 3 269 702 517 412 300 202 150 333 2,885
Indiana 15 50 43 23 13 6 2 1 1 140 616 361 378 152 98 60 32 20 23 1,123
Iowa - - - - - - - - - - 14 109 216 179 137 88 56 41 82 909
Kansas 4 82 59 23 13 8 4 2 1 192 27 53 84 39 29 26 18 11 21 281
Kentucky 2 27 20 6 4 3 2 1 0 62 29 138 213 82 55 39 26 20 36 609
Louisiana 2 6 12 9 23 25 11 9 18 115 63 83 195 141 120 97 85 72 168 962
Maine 0 7 6 1 1 1 0 0 0 16 1 26 34 17 15 12 6 6 12 129
Maryland - 107 124 33 16 10 7 5 8 311 5 153 261 128 97 76 60 51 195 1,021
Massachusetts 2 184 83 17 13 8 5 4 7 322 36 72 287 268 262 251 183 153 441 1,917
Michigan - 131 135 42 17 11 6 4 6 352 429 193 452 341 270 205 147 117 211 1,935
Minnesota - 67 95 34 15 6 2 1 1 220 1 187 227 104 49 27 14 7 9 624
Mississippi - 19 21 8 6 5 2 1 1 64 0 131 261 163 115 85 50 39 102 945
Missouri - 179 175 58 32 22 11 7 8 494 0 129 257 142 100 78 56 39 71 871
Montana - - - - - - - - - - - 36 73 40 29 26 16 14 24 258
Nebraska 19 13 42 17 12 10 5 5 7 111 20 12 41 33 33 36 30 27 92 304
Nevada - 26 12 7 6 2 1 0 1 55 - 112 107 51 35 28 16 12 18 378
New Hampshire - 62 9 2 1 0 - - - 74 - 71 71 29 19 12 6 5 10 223
New Jersey - 203 147 41 24 15 10 6 9 453 0 200 437 245 205 182 136 118 276 1,799
New Mexico - 1 1 3 3 2 1 0 0 12 1 82 166 101 90 73 51 41 98 702
New York 23 45 240 137 96 79 58 51 81 789 117 88 665 480 385 297 219 195 727 3,056
North Carolina 7 178 173 47 20 12 7 4 4 446 7 166 602 448 318 198 104 64 96 1,996
North Dakota - - - - - - - - - - 4 31 55 34 28 19 12 9 18 206
Ohio 3 192 230 68 38 24 12 9 12 584 25 230 604 397 318 258 171 134 312 2,425
Oklahoma 19 43 82 29 22 12 8 4 4 203 450 57 219 131 96 67 43 37 76 725
Oregon 2 28 23 8 4 1 1 1 0 67 42 106 232 144 107 76 49 35 67 815
Pennsylvania - 113 205 101 60 32 19 10 20 560 8 202 645 488 428 332 227 163 386 2,870
Rhode Island 3 24 24 10 7 6 2 1 4 78 12 7 30 32 48 51 43 36 84 332
South Carolina 2 27 28 12 6 5 2 1 1 81 10 105 385 223 152 93 46 30 32 1,065
South Dakota - 2 8 6 3 2 1 0 0 22 1 14 31 21 22 17 12 9 8 133
Tennessee 0 90 43 18 12 8 3 2 3 179 127 514 621 251 153 104 60 44 86 1,833
Texas 29 257 537 292 176 98 41 20 13 1,434 76 602 1,472 912 681 532 367 299 756 5,622
Utah - 24 22 7 2 1 0 0 0 57 24 112 259 125 72 41 23 13 18 662
Vermont 0 4 6 3 1 0 0 0 - 15 3 18 37 22 15 10 8 5 11 125
Virginia - 73 189 53 24 12 6 2 2 361 0 48 351 275 230 179 109 72 86 1,349
Washington 2 122 188 53 26 13 8 6 5 420 12 59 257 237 216 178 123 101 261 1,431
West Virginia - 0 4 2 2 2 1 0 2 14 9 55 141 79 45 33 15 11 20 397
Wisconsin 1 70 100 68 47 33 14 5 4 342 54 109 269 274 289 268 194 154 353 1,911
Wyoming - 2 0 - - 0 0 - - 3 36 41 58 31 20 16 9 9 13 196
U.S. Total 163 3,417 4,252 1,732 1,084 686 360 225 298 12,053 3,433 7,516 15,922 9,776 7,681 6,040 4,180 3,309 8,163 62,587
Puerto Rico 0 1 11 7 6 6 4 3 14 52 12 0 8 23 42 50 48 46 143 360
Grand Total 163 3,418 4,263 1,740 1,090 692 364 228 311 12,105 3,444 7,517 15,930 9,799 7,723 6,090 4,228 3,355 8,306 62,948

(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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