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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2019 / Table HM-64 - Highway Statistics 2019

Highway Statistics Series

Highway Statistics 2019


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Functional System Length - 2019

September 30, 2020

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 - 431 86 24 15 6 3 1 4 571
Alaska 10 249 341 150 102 67 36 21 24 991
Arizona 6 539 223 79 33 16 7 4 8 910
Arkansas - 232 137 35 16 9 5 3 3 439
California 1 563 364 139 76 34 17 9 12 1,213
Colorado - 124 299 115 43 27 21 12 6 648
Connecticut - 16 7 3 2 - - - - 29
Delaware - - - - - - - - - -
District of Columbia - - - - - - - - - -
Florida - 600 98 8 5 3 2 1 1 717
Georgia - 236 211 56 19 7 4 1 2 537
Hawaii - - - - - - - - - -
Idaho - 329 140 27 12 6 2 1 2 519
Illinois - 714 348 94 41 24 10 6 6 1,243
Indiana 1 306 283 86 56 21 14 8 11 784
Iowa 5 311 211 55 21 7 3 1 2 610
Kansas 1 381 176 53 18 7 3 1 1 640
Kentucky - 499 137 35 19 13 4 2 3 711
Louisiana 10 200 118 85 65 33 12 4 2 520
Maine - 155 67 25 17 8 4 2 1 279
Maryland - 65 59 10 5 2 1 - 1 142
Massachusetts - 37 16 5 2 1 1 - 1 63
Michigan 4 190 246 58 30 16 9 5 5 558
Minnesota - 174 296 56 31 17 9 4 2 588
Mississippi - 400 107 30 19 13 6 2 2 578
Missouri - 595 189 34 12 6 3 2 1 842
Montana - 576 392 71 29 14 5 3 4 1,094
Nebraska - 188 167 33 12 8 4 1 2 415
Nevada - 409 30 8 5 3 2 1 - 457
New Hampshire - 111 24 4 2 1 - - - 142
New Jersey - 18 21 3 1 1 - - - 45
New Mexico - 522 195 60 32 17 6 4 6 843
New York 6 366 277 75 37 21 7 6 8 798
North Carolina 5 402 108 21 14 7 5 1 1 559
North Dakota - 360 119 20 7 1 1 - - 510
Ohio - 362 183 49 23 14 5 2 4 643
Oklahoma 19 255 259 60 26 16 7 5 4 631
Oregon - 293 146 36 13 4 1 1 1 495
Pennsylvania - 562 319 90 46 24 11 7 8 1,066
Rhode Island - 15 2 - - - - - - 18
South Carolina - 339 109 35 23 17 10 6 7 546
South Dakota 2 184 343 39 12 8 2 1 - 589
Tennessee - 491 110 21 12 6 3 2 - 645
Texas 2 911 796 184 66 26 9 4 3 1,998
Utah - 336 257 68 17 4 1 - - 685
Vermont 1 170 66 10 5 3 1 - - 255
Virginia - 284 257 38 11 5 2 - - 598
Washington - 194 136 41 24 11 9 8 7 429
West Virginia - 172 106 20 10 5 4 1 2 319
Wisconsin - 229 167 55 32 18 6 3 2 513
Wyoming - 510 203 53 26 8 5 2 1 807
U.S. Total 73 15,607 8,948 2,357 1,146 584 281 149 159 29,231
Puerto Rico 5 1 8 5 4 4 2 5 14 42
Grand Total 78 15,607 8,956 2,362 1,150 588 283 154 173 29,273

September 30, 2020

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 - - - - - - - - - - - 1,062 723 124 51 27 13 8 22 2,030 22 1,098 2,181 415 149 47 13 12 10 3,925
Alaska - - - - - - - - - - 298 82 120 53 59 45 35 31 76 501 100 46 81 50 44 46 25 16 17 325
Arizona - 7 6 4 1 - - - - 19 41 379 425 180 112 64 30 17 15 1,222 16 266 711 434 274 198 104 59 32 2,080
Arkansas - 2 25 19 13 7 4 1 - 72 - 353 824 321 185 101 46 26 21 1,877 23 365 1,328 617 336 191 102 31 54 3,024
California 1 125 164 59 32 17 8 5 4 415 96 909 1,403 481 232 122 56 34 43 3,280 379 822 2,127 1,141 820 625 266 168 103 6,073
Colorado - 5 10 8 4 1 - - - 28 - 583 1,116 442 208 111 53 30 25 2,568 295 107 949 752 550 334 186 145 167 3,190
Connecticut - 14 17 2 2 - - - - 36 - 10 46 30 17 8 5 3 2 122 - 3 56 50 52 29 13 7 8 218
Delaware 1 4 15 6 2 1 - 1 - 29 - 25 53 15 4 1 - - - 99 - 22 50 11 4 1 - - - 89
District of Columbia - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Florida - 102 64 6 3 1 - 1 - 176 4 1,115 1,114 241 82 33 12 6 9 2,613 9 483 1,102 364 130 32 10 7 8 2,137
Georgia - - - - - - - - - - 1 858 1,143 272 99 34 9 6 5 2,427 44 1,335 2,302 588 311 98 41 12 33 4,720
Hawaii - - - - - - - - - - - 2 19 17 14 10 7 5 6 78 1 37 59 37 41 31 20 13 17 255
Idaho - 52 49 7 2 1 - - - 111 226 480 612 184 76 37 17 9 5 1,419 10 218 531 159 113 64 27 12 10 1,133
Illinois - 8 15 11 7 4 1 1 1 48 - 373 925 440 270 163 89 48 53 2,360 17 387 1,875 1,137 613 371 166 112 56 4,717
Indiana - 53 47 29 13 7 2 1 1 154 12 545 808 319 166 70 28 13 12 1,960 11 294 899 442 216 118 95 19 20 2,104
Iowa - - - - - - - - - - 34 941 1,187 556 324 181 91 54 49 3,383 2 - - - - - - - - -
Kansas - 176 180 30 8 5 2 1 - 404 1 1,476 844 159 71 41 19 10 9 2,628 37 1,605 1,524 602 278 99 53 35 37 4,233
Kentucky - 253 114 17 8 4 2 1 - 398 1 431 484 174 86 33 12 6 5 1,232 22 299 913 574 289 124 61 23 19 2,301
Louisiana - 1 8 5 6 3 2 1 1 24 11 107 398 194 110 70 43 24 26 973 10 106 733 347 238 179 78 38 59 1,778
Maine - - - - - - - - 1 3 1 267 259 91 53 34 22 17 48 791 5 199 305 128 93 73 46 33 64 941
Maryland - 42 23 2 - - - - 1 69 - 151 121 23 10 6 4 3 3 321 5 236 291 116 39 17 4 3 1 707
Massachusetts - 4 5 1 - - - - - 10 - 17 46 21 11 5 2 1 1 105 1 28 185 56 26 8 - - - 302
Michigan - 173 129 22 6 5 4 2 1 343 - 789 851 253 120 61 27 14 15 2,130 62 1,177 2,305 711 277 151 90 58 67 4,836
Minnesota - 17 10 4 1 1 - - - 34 20 1,245 1,168 444 276 156 67 40 37 3,433 25 1,635 1,936 928 725 393 367 188 265 6,437
Mississippi - - - - - - - - - - - 597 685 228 135 73 31 17 17 1,783 35 538 1,371 622 465 346 209 126 78 3,754
Missouri - 645 370 69 26 9 4 2 1 1,125 - 636 851 231 86 39 18 9 9 1,880 28 272 1,269 1,108 669 364 169 88 53 3,993
Montana - - - - - - - - - - - 653 1,307 423 190 91 43 27 41 2,774 8 438 1,293 528 285 149 83 39 35 2,851
Nebraska 1 81 132 58 28 16 9 4 3 330 49 922 828 241 123 76 40 24 35 2,289 20 1,761 1,084 459 274 193 126 91 119 4,107
Nevada - - - - - - - - - - - 916 462 91 32 11 4 2 1 1,519 1 90 401 159 46 17 7 4 2 726
New Hampshire - 8 1 - - - - - - 9 - 136 116 30 18 8 6 4 5 323 4 161 231 80 57 37 21 13 25 625
New Jersey - 11 18 4 2 1 - - - 35 - 43 47 17 16 14 7 5 10 160 3 47 92 58 33 24 15 3 6 279
New Mexico - - - - - - - - - - - 651 717 250 145 79 36 18 21 1,916 10 280 506 391 285 238 151 116 303 2,270
New York - 20 82 36 22 12 5 2 2 182 37 304 1,032 355 173 92 48 32 32 2,068 18 317 1,288 533 304 193 108 26 72 2,841
North Carolina 2 224 143 28 9 5 3 1 1 412 24 364 769 259 98 38 15 8 6 1,555 16 85 1,315 620 387 226 124 120 80 2,958
North Dakota - - - - - - - - - - - 1,395 1,049 263 112 55 26 16 27 2,945 5 760 1,233 302 124 43 26 13 24 2,526
Ohio - 132 125 43 21 9 3 2 1 334 - 530 648 186 84 40 16 9 10 1,523 11 822 1,055 340 123 55 27 22 9 2,453
Oklahoma 2 - - - - - - - - - 31 386 933 403 217 125 59 41 54 2,218 20 498 1,316 358 235 127 58 22 10 2,624
Oregon - - - - - - - - - - - 665 1,318 376 157 71 28 16 13 2,644 10 121 869 720 265 45 29 43 - 2,093
Pennsylvania - 120 154 37 18 11 8 5 6 360 2 341 743 251 117 57 31 17 22 1,578 16 341 1,527 1,240 604 359 125 78 164 4,438
Rhode Island - 7 3 1 - - - - - 11 1 6 11 13 19 16 13 8 11 97 - 7 9 11 9 13 8 7 6 72
South Carolina 3 14 22 3 2 1 1 - - 44 4 271 716 280 143 67 33 15 16 1,542 19 398 1,177 699 354 203 78 43 36 2,987
South Dakota 1 89 134 44 14 6 2 1 - 290 14 399 1,126 520 272 134 63 36 29 2,579 20 400 1,219 613 330 179 105 44 36 2,926
Tennessee - 9 5 - - - - - - 14 62 689 704 169 82 40 21 9 7 1,723 31 1 30 - - - - - - 31
Texas - 46 58 15 4 2 - - - 128 40 2,566 3,455 1,331 563 238 99 51 40 8,342 93 2,033 4,317 1,968 1,159 603 242 81 74 10,478
Utah - - 4 2 2 1 - - - 9 - 179 516 251 128 53 19 12 5 1,163 2 153 398 267 200 143 87 44 29 1,320
Vermont - - 1 1 - - - - - 2 1 117 136 34 20 8 6 3 5 328 5 127 312 129 75 37 18 16 17 732
Virginia - 26 52 10 3 1 - - - 92 1 270 829 318 135 50 20 8 4 1,633 13 177 1,614 1,050 423 161 49 18 11 3,505
Washington - 119 264 123 47 20 16 11 11 612 - 177 597 291 133 58 27 13 16 1,313 12 208 700 451 286 184 99 59 75 2,061
West Virginia - - - - - - - - - - 10 148 376 212 115 63 35 21 41 1,010 4 34 462 352 250 111 54 27 47 1,339
Wisconsin - 51 49 52 29 13 7 1 1 203 3 744 905 561 303 161 86 59 49 2,867 13 1,173 1,107 872 468 307 284 175 346 4,732
Wyoming - - - - - - - - - - 1 615 877 268 120 44 16 8 14 1,963 3 280 579 195 82 33 10 8 5 1,191
U.S. Total 13 2,641 2,497 759 338 165 85 45 38 6,567 1,026 26,918 36,443 12,888 6,371 3,215 1,532 891 1,029 89,287 1,515 22,291 49,220 23,789 13,408 7,620 4,079 2,318 2,710 125,435
Puerto Rico - - - - - - - - - - 4 - 4 5 5 6 4 5 12 42 - - 1 2 7 5 7 7 46 76
Grand Total 13 2,641 2,497 759 338 165 85 45 38 6,567 1,030 26,918 36,447 12,894 6,376 3,221 1,536 896 1,041 89,328 1,516 22,291 49,221 23,791 13,415 7,626 4,087 2,325 2,755 125,511

September 30, 2020

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 1 270 70 29 21 15 9 6 12 432
Alaska - 37 25 9 4 2 1 - - 79
Arizona 4 142 67 20 9 5 3 1 2 249
Arkansas - 108 105 40 25 13 8 5 6 310
California 4 285 413 209 145 86 47 25 27 1,238
Colorado - 66 113 49 40 18 9 5 4 304
Connecticut - 156 107 29 15 7 3 1 1 318
Delaware 2 7 12 9 5 1 2 1 1 38
District of Columbia - - 2 2 2 2 1 1 3 12
Florida - 458 214 43 25 17 10 6 6 778
Georgia - 393 186 65 31 16 10 4 5 710
Hawaii - 1 12 10 11 9 5 3 4 55
Idaho - 52 29 5 3 1 1 - - 92
Illinois 3 325 367 88 61 38 27 15 17 939
Indiana 1 127 167 82 55 29 13 8 10 491
Iowa 11 64 70 19 9 7 3 2 2 175
Kansas 2 109 65 28 15 9 4 2 2 234
Kentucky 1 118 68 19 13 7 4 2 1 232
Louisiana 18 128 78 48 46 47 23 13 13 395
Maine - 59 18 5 2 2 1 - - 87
Maryland - 131 125 30 17 11 6 6 12 338
Massachusetts 4 330 101 27 18 13 6 3 5 502
Michigan 3 137 301 89 53 38 24 15 16 673
Minnesota - 76 144 45 25 16 9 4 6 325
Mississippi - 155 47 17 14 11 5 2 2 253
Missouri - 306 136 39 25 17 7 4 4 538
Montana - 49 36 5 4 2 1 - 1 98
Nebraska - 18 30 11 5 3 1 1 1 69
Nevada - 78 39 22 15 6 2 1 - 163
New Hampshire - 70 10 2 1 - - - - 83
New Jersey - 122 151 34 26 15 12 9 17 387
New Mexico - 99 34 9 6 4 3 1 2 156
New York 13 228 347 141 70 48 29 19 38 920
North Carolina 9 397 240 75 35 17 7 4 3 778
North Dakota - 30 23 5 2 1 - - - 61
Ohio - 436 283 89 48 34 19 10 12 931
Oklahoma 15 71 112 38 21 13 7 5 5 272
Oregon - 111 82 19 10 6 4 2 1 234
Pennsylvania - 285 261 96 56 38 27 14 21 797
Rhode Island - 27 16 4 2 2 1 - - 52
South Carolina - 164 82 26 15 6 3 1 7 304
South Dakota - 11 50 16 6 3 2 - - 88
Tennessee - 348 131 41 19 7 4 2 3 557
Texas 3 388 567 233 141 77 31 13 6 1,456
Utah - 77 114 37 14 7 3 1 1 253
Vermont - 40 19 3 1 1 - - - 64
Virginia 1 159 234 67 29 17 9 3 2 521
Washington - 140 111 41 19 12 6 4 3 335
West Virginia - 124 64 17 11 8 5 2 3 235
Wisconsin 2 103 109 63 48 25 10 3 2 364
Wyoming - 43 35 13 6 4 2 2 1 106
U.S. Total 97 7,660 6,219 2,160 1,297 793 427 233 290 19,080
Puerto Rico 19 3 49 42 39 29 19 18 39 238
Grand Total 116 7,663 6,268 2,201 1,336 822 447 252 329 19,318

September 30, 2020

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 - 12 11 5 3 1 - - 1 33 22 486 479 130 66 39 24 18 52 1,293
Alaska - - - - - - - - - - - 22 53 28 15 10 4 3 5 140
Arizona 12 113 78 24 15 7 1 1 1 240 223 63 143 125 101 78 51 35 35 632
Arkansas 1 11 38 19 11 9 6 6 2 102 14 58 194 122 79 63 34 26 40 615
California 23 276 529 265 174 94 52 27 29 1,445 394 215 554 631 774 814 690 644 1,909 6,232
Colorado - 64 138 55 31 16 9 6 5 324 - 71 248 196 160 122 80 64 127 1,068
Connecticut - 78 110 29 14 7 3 1 2 244 - 16 159 153 117 87 60 40 81 712
Delaware - 3 19 11 3 1 - - - 39 3 25 86 39 21 13 9 6 12 211
District of Columbia 1 - 1 2 2 2 1 1 4 15 3 - - - 2 6 6 9 81 104
Florida - 250 236 51 24 14 6 3 3 587 90 972 1,619 605 300 170 87 51 76 3,881
Georgia 2 77 45 18 15 9 5 2 4 174 4 601 1,020 366 163 87 46 29 40 2,351
Hawaii - 1 5 6 6 5 3 3 6 34 1 23 48 39 37 32 23 16 49 268
Idaho 4 11 8 2 1 1 1 1 - 25 186 44 76 38 24 20 11 9 15 238
Illinois - 21 36 17 15 11 7 5 4 118 11 153 722 558 434 320 209 159 322 2,878
Indiana 2 37 46 30 24 11 5 3 3 160 24 184 532 325 235 166 104 80 122 1,749
Iowa - - - - - - - - - - 25 92 209 179 127 88 57 43 93 890
Kansas - 69 73 22 12 7 4 2 2 193 1 72 82 42 34 27 15 12 21 305
Kentucky - 23 17 10 7 4 2 1 1 64 7 113 241 112 66 41 24 16 28 640
Louisiana 1 7 12 10 24 19 10 8 9 100 102 72 187 127 103 90 69 61 134 843
Maine - 2 5 2 2 1 1 1 2 16 2 14 31 22 17 14 9 6 15 129
Maryland - 99 128 33 19 12 7 5 9 311 5 162 278 133 97 74 59 51 166 1,019
Massachusetts 2 155 102 26 11 9 5 4 9 322 33 48 264 269 270 269 197 163 465 1,945
Michigan - 75 167 53 25 13 8 7 6 353 24 134 440 393 328 275 207 164 397 2,340
Minnesota 1 57 93 34 16 9 4 3 2 219 12 146 220 97 53 32 18 13 28 606
Mississippi - 12 30 9 5 3 2 1 1 64 1 139 283 160 106 76 51 38 98 951
Missouri - 187 174 57 29 25 10 6 7 494 - 131 272 136 95 75 48 34 75 866
Montana - - - - - - - - - - - 28 64 40 33 24 15 15 37 257
Nebraska 1 15 50 21 13 8 6 5 12 130 9 16 44 38 36 38 29 27 89 317
Nevada 1 22 11 9 7 3 1 1 - 54 1 116 99 52 42 28 14 9 18 378
New Hampshire - 58 12 2 1 1 - - - 74 - 64 68 30 17 13 8 5 19 223
New Jersey - 146 181 46 26 20 12 8 14 453 - 121 374 217 200 181 149 140 416 1,799
New Mexico - 1 3 4 2 - 1 - - 12 1 85 163 107 86 75 50 37 98 701
New York 25 52 238 131 99 83 60 50 74 786 101 96 661 484 378 304 224 201 714 3,063
North Carolina 14 179 166 45 23 13 6 4 3 437 97 200 626 417 267 159 87 55 94 1,905
North Dakota - - - - - - - - - - 1 30 54 36 28 17 13 10 19 207
Ohio - 170 232 75 41 26 16 10 11 580 5 213 618 372 292 235 169 136 404 2,440
Oklahoma 15 35 74 28 17 11 8 3 3 177 440 64 217 137 96 71 46 37 69 738
Oregon 5 17 24 9 3 2 2 - - 57 4 94 252 161 116 81 51 33 58 847
Pennsylvania - 102 217 100 55 35 19 10 17 557 4 203 649 498 422 337 222 155 382 2,868
Rhode Island 4 21 18 10 5 3 2 1 1 61 12 6 21 31 43 49 41 37 102 331
South Carolina 3 19 35 13 5 6 2 1 1 82 4 73 328 233 167 108 58 37 56 1,060
South Dakota - - 5 6 3 2 1 1 - 18 9 8 30 23 17 17 15 9 8 128
Tennessee - 74 52 17 15 7 4 2 3 173 71 512 640 240 157 94 62 44 85 1,836
Texas 35 222 547 282 165 92 37 14 9 1,367 124 631 1,557 976 757 577 416 346 860 6,119
Utah - 20 18 7 3 1 - - - 49 6 121 249 118 68 43 21 14 20 654
Vermont - 2 9 3 1 1 - - - 16 4 21 44 22 13 9 4 2 7 122
Virginia 1 85 175 53 23 13 4 2 2 358 2 56 369 289 222 161 101 71 82 1,350
Washington 3 119 185 52 27 15 8 6 7 419 29 59 268 239 215 171 120 94 246 1,414
West Virginia - - 3 3 1 2 1 1 3 14 33 43 132 69 41 28 15 11 33 373
Wisconsin 8 42 103 71 65 34 11 5 4 334 44 42 239 286 338 294 219 166 321 1,906
Wyoming - 2 - - - - - - - 3 22 37 72 35 21 16 10 9 18 217
U.S. Total 165 3,044 4,463 1,778 1,082 667 354 221 275 11,885 2,210 6,996 16,277 10,175 7,898 6,221 4,357 3,492 8,743 64,158
Puerto Rico 4 - 8 7 5 5 5 5 17 52 9 - 7 21 43 55 50 47 167 390
Grand Total 169 3,045 4,471 1,785 1,088 672 359 226 292 11,937 2,219 6,996 16,284 10,195 7,940 6,276 4,408 3,538 8,910 64,547

(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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