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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Highway Statistics Series / 2019 / Table HM-47 - Highway Statistics 2019

Highway Statistics Series

Highway Statistics 2019


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NATIONAL HIGHWAY SYSTEM LENGTH - 2019
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

September 30, 2020

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-47 (Sheet 1 of 4)
STATE INTERSTATE SYSTEM OTHER
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 - 431 86 24 15 6 3 1 4 571 - 1,043 702 119 49 26 13 8 21 1,981
Alaska 10 249 341 150 102 67 36 21 24 991 298 106 166 85 87 67 49 41 88 690
Arizona 6 539 223 79 33 16 7 4 8 910 28 356 398 178 114 64 29 17 19 1,175
Arkansas - 232 137 35 16 9 5 3 3 439 - 356 850 338 194 105 48 26 20 1,938
California 1 563 364 139 76 34 17 9 12 1,213 26 989 1,557 546 268 138 62 37 44 3,640
Colorado - 124 299 115 43 27 21 12 6 648 - 577 1,116 449 212 112 54 30 24 2,576
Connecticut - 16 7 3 2 - - - - 29 - 24 63 32 19 9 5 3 2 158
Delaware - - - - - - - - - - 1 31 73 22 7 2 1 1 - 137
District of Columbia - - - - - - - - - - - - - - - - - - - -
Florida - 600 98 8 5 3 2 1 1 717 2 1,217 1,155 243 84 34 12 7 10 2,762
Georgia - 236 211 56 19 7 4 1 2 537 - 1,056 1,494 415 146 49 14 7 7 3,187
Hawaii - - - - - - - - - - - 2 19 17 14 10 7 5 7 80
Idaho - 329 140 27 12 6 2 1 2 519 205 522 652 187 76 38 17 9 5 1,506
Illinois - 714 348 94 41 24 10 6 6 1,243 - 381 940 450 277 167 90 49 54 2,408
Indiana 1 306 283 86 56 21 14 8 11 784 1 497 707 283 150 66 24 10 9 1,747
Iowa 5 311 211 55 21 7 3 1 2 610 33 941 1,187 556 325 181 91 54 49 3,384
Kansas 1 381 176 53 18 7 3 1 1 640 - 1,653 1,023 188 79 46 22 10 9 3,030
Kentucky - 499 137 35 19 13 4 2 3 711 1 685 602 196 95 37 14 7 6 1,643
Louisiana 10 200 118 85 65 33 12 4 2 520 13 114 450 218 124 76 48 24 26 1,080
Maine - 155 67 25 17 8 4 2 1 279 2 268 262 92 54 35 22 18 48 798
Maryland - 65 59 10 5 2 1 - 1 142 - 189 138 23 10 6 4 3 4 377
Massachusetts - 37 16 5 2 1 1 - 1 63 - 67 182 72 42 22 14 7 14 420
Michigan 4 190 246 58 30 16 9 5 5 558 - 963 983 278 128 68 32 16 17 2,483
Minnesota - 174 296 56 31 17 9 4 2 588 20 1,263 1,178 448 278 157 68 40 37 3,468
Mississippi - 400 107 30 19 13 6 2 2 578 - 599 694 234 139 76 32 18 19 1,812
Missouri - 595 189 34 12 6 3 2 1 842 - 1,275 1,205 299 115 51 22 11 11 2,989
Montana - 576 392 71 29 14 5 3 4 1,094 - 653 1,307 423 190 91 43 27 41 2,774
Nebraska - 188 167 33 12 8 4 1 2 415 51 1,010 960 298 154 94 50 28 38 2,632
Nevada - 409 30 8 5 3 2 1 - 457 - 918 479 96 32 11 4 2 1 1,544
New Hampshire - 111 24 4 2 1 - - - 142 - 156 136 38 23 11 8 7 7 387
New Jersey - 18 21 3 1 1 - - - 45 - 54 65 21 17 15 7 5 10 195
New Mexico - 522 195 60 32 17 6 4 6 843 - 630 665 212 118 63 28 15 18 1,749
New York 6 366 277 75 37 21 7 6 8 798 37 324 1,117 392 196 104 53 34 34 2,254
North Carolina 5 402 108 21 14 7 5 1 1 559 20 642 1,012 328 122 51 20 10 7 2,193
North Dakota - 360 119 20 7 1 1 - - 510 - 1,395 1,050 263 112 55 26 16 27 2,945
Ohio - 362 183 49 23 14 5 2 4 643 1 669 791 235 108 49 19 11 11 1,893
Oklahoma 19 255 259 60 26 16 7 5 4 631 33 399 956 412 222 127 61 42 55 2,274
Oregon - 293 146 36 13 4 1 1 1 495 - 665 1,315 377 158 72 28 16 13 2,644
Pennsylvania - 562 319 90 46 24 11 7 8 1,066 - 449 869 282 131 66 38 22 28 1,884
Rhode Island - 15 2 - - - - - - 18 1 12 14 14 19 16 13 8 11 107
South Carolina - 339 109 35 23 17 10 6 7 546 7 285 738 284 145 68 34 15 16 1,586
South Dakota 2 184 343 39 12 8 2 1 - 589 15 488 1,260 569 289 140 65 37 29 2,876
Tennessee - 491 110 21 12 6 3 2 - 645 - 699 712 171 84 41 22 9 8 1,746
Texas 2 911 796 184 66 26 9 4 3 1,998 33 2,441 3,108 1,173 500 211 83 42 33 7,591
Utah - 336 257 68 17 4 1 - - 685 - 179 521 258 133 55 20 12 5 1,183
Vermont 1 170 66 10 5 3 1 - - 255 1 109 128 32 18 7 5 2 5 306
Virginia - 284 257 38 11 5 2 - - 598 1 296 890 340 144 55 21 8 4 1,759
Washington - 194 136 41 24 11 9 8 7 429 1 297 858 414 181 79 43 25 28 1,924
West Virginia - 172 106 20 10 5 4 1 2 319 10 148 376 212 115 63 35 21 41 1,010
Wisconsin - 229 167 55 32 18 6 3 2 513 3 828 967 623 341 180 96 61 58 3,155
Wyoming - 510 203 53 26 8 5 2 1 807 - 615 877 268 120 44 16 8 14 1,963
U.S. Total 73 15,607 8,948 2,357 1,146 584 281 149 159 29,231 843 29,535 38,970 13,703 6,758 3,412 1,635 941 1,094 96,048
Puerto Rico 5 1 8 5 4 4 2 5 14 42 1 - 4 5 5 6 4 5 12 41
Grand Total 78 15,607 8,956 2,362 1,150 588 283 154 173 29,273 844 29,535 38,974 13,708 6,763 3,418 1,639 946 1,107 96,089

NATIONAL HIGHWAY SYSTEM LENGTH - 2019
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

September 30, 2020

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-47 (Sheet 2 of 4)
STATE TOTAL RURAL NHS
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama - 1,474 788 143 64 32 16 9 25 2,551
Alaska 308 356 508 235 189 134 85 62 112 1,681
Arizona 34 895 622 257 147 80 36 21 27 2,085
Arkansas - 588 987 372 210 114 53 29 23 2,377
California 27 1,552 1,920 685 344 173 79 45 56 4,854
Colorado - 701 1,415 564 255 139 75 43 31 3,224
Connecticut - 40 70 36 20 9 6 3 2 186
Delaware 1 31 73 22 7 2 1 1 - 137
District of Columbia - - - - - - - - - -
Florida 2 1,817 1,253 251 88 37 14 8 11 3,479
Georgia - 1,292 1,706 471 165 56 18 8 9 3,725
Hawaii - 2 19 17 14 10 7 5 7 80
Idaho 205 851 791 214 89 44 19 9 7 2,025
Illinois - 1,095 1,288 545 318 191 100 55 60 3,651
Indiana 1 803 990 369 207 87 38 18 20 2,531
Iowa 37 1,251 1,398 611 346 187 94 55 51 3,993
Kansas 1 2,034 1,199 241 97 53 25 12 10 3,670
Kentucky 1 1,184 738 232 113 51 18 9 9 2,354
Louisiana 22 314 568 303 190 109 60 29 28 1,599
Maine 2 422 329 118 72 43 26 20 49 1,078
Maryland - 254 196 33 15 8 5 3 5 519
Massachusetts - 104 198 76 44 23 15 7 15 483
Michigan 4 1,153 1,229 335 157 83 41 21 21 3,041
Minnesota 20 1,438 1,473 504 309 174 77 44 38 4,056
Mississippi - 999 801 264 159 89 39 21 21 2,391
Missouri - 1,869 1,394 333 127 57 25 13 12 3,831
Montana - 1,229 1,699 495 219 105 48 29 44 3,868
Nebraska 51 1,198 1,127 331 166 102 54 29 40 3,047
Nevada - 1,327 509 103 36 15 6 3 1 2,001
New Hampshire - 267 161 42 25 12 8 7 7 529
New Jersey - 73 86 24 19 15 7 6 10 240
New Mexico - 1,152 860 272 150 80 34 19 25 2,593
New York 43 690 1,394 467 233 125 60 40 42 3,051
North Carolina 25 1,045 1,120 349 136 58 25 11 8 2,752
North Dakota - 1,756 1,169 284 120 56 27 17 27 3,455
Ohio 1 1,031 974 284 131 63 25 14 14 2,536
Oklahoma 52 654 1,215 472 248 143 68 47 58 2,905
Oregon - 958 1,461 413 171 76 29 17 14 3,139
Pennsylvania - 1,011 1,188 371 177 90 48 29 36 2,951
Rhode Island 1 27 17 14 19 16 13 8 11 125
South Carolina 7 624 847 319 169 85 44 21 24 2,132
South Dakota 17 672 1,603 608 301 148 67 38 29 3,466
Tennessee - 1,190 822 192 96 47 25 11 8 2,391
Texas 35 3,352 3,904 1,357 566 238 92 45 36 9,590
Utah - 516 778 326 151 59 21 12 6 1,868
Vermont 2 279 194 43 22 10 6 2 5 561
Virginia 1 580 1,147 378 155 60 22 9 4 2,356
Washington 1 491 994 455 205 90 52 32 35 2,353
West Virginia 10 320 482 232 125 67 38 22 43 1,329
Wisconsin 3 1,057 1,134 678 373 199 102 64 60 3,668
Wyoming - 1,124 1,080 322 145 53 22 9 15 2,770
U.S. Total 917 45,141 47,918 16,060 7,904 3,997 1,916 1,090 1,254 125,279
Puerto Rico 5 1 12 10 9 10 6 10 26 83
Grand Total 922 45,142 47,930 16,070 7,912 4,006 1,922 1,100 1,279 125,362

NATIONAL HIGHWAY SYSTEM LENGTH - 2019
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

September 30, 2020

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-47 (Sheet 3 of 4)
STATE INTERSTATE SYSTEM OTHER
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 1 270 70 29 21 15 9 6 12 432 26 485 470 130 68 38 24 18 51 1,284
Alaska - 37 25 9 4 2 1 - - 79 - 27 60 30 16 11 6 4 7 161
Arizona 4 142 67 20 9 5 3 1 2 249 46 169 197 129 106 78 47 34 35 794
Arkansas - 108 105 40 25 13 8 5 6 310 1 65 223 127 85 67 39 30 42 678
California 4 285 413 209 145 86 47 25 27 1,238 275 479 1,074 893 949 916 747 677 1,961 7,696
Colorado - 66 113 49 40 18 9 5 4 304 - 130 384 249 189 137 87 69 134 1,380
Connecticut - 156 107 29 15 7 3 1 1 318 - 93 269 182 131 95 64 41 83 958
Delaware 2 7 12 9 5 1 2 1 1 38 2 29 107 51 25 14 10 6 12 254
District of Columbia - - 2 2 2 2 1 1 3 12 4 - 1 3 5 7 8 10 86 119
Florida - 458 214 43 25 17 10 6 6 778 10 1,215 1,857 665 338 196 102 61 98 4,531
Georgia - 393 186 65 31 16 10 4 5 710 - 718 1,170 430 208 114 61 40 64 2,806
Hawaii - 1 12 10 11 9 5 3 4 55 1 24 54 47 46 40 27 21 61 319
Idaho - 52 29 5 3 1 1 - - 92 121 49 80 38 25 20 12 10 16 250
Illinois 3 325 367 88 61 38 27 15 17 939 13 176 763 588 465 349 230 181 392 3,144
Indiana 1 127 167 82 55 29 13 8 10 491 8 124 247 124 88 47 24 20 18 693
Iowa 11 64 70 19 9 7 3 2 2 175 19 93 212 182 131 91 60 45 98 912
Kansas 2 109 65 28 15 9 4 2 2 234 7 141 155 65 46 34 19 15 25 502
Kentucky 1 118 68 19 13 7 4 2 1 232 18 136 260 123 73 44 26 18 28 708
Louisiana 18 128 78 48 46 47 23 13 13 395 85 92 214 138 124 107 78 66 138 958
Maine - 59 18 5 2 2 1 - - 87 2 17 38 26 21 17 12 8 18 158
Maryland - 131 125 30 17 11 6 6 12 338 7 247 391 164 111 87 66 57 186 1,308
Massachusetts 4 330 101 27 18 13 6 3 5 502 46 204 368 299 287 284 207 172 489 2,311
Michigan 3 137 301 89 53 38 24 15 16 673 26 209 608 449 356 290 216 172 409 2,709
Minnesota - 76 144 45 25 16 9 4 6 325 8 205 317 133 70 43 23 17 34 841
Mississippi - 155 47 17 14 11 5 2 2 253 - 151 313 167 111 79 52 39 100 1,013
Missouri - 306 136 39 25 17 7 4 4 538 - 317 439 188 124 95 58 40 83 1,344
Montana - 49 36 5 4 2 1 - 1 98 - 28 60 37 28 19 11 11 26 220
Nebraska - 18 30 11 5 3 1 1 1 69 7 32 94 59 50 49 37 34 107 461
Nevada - 78 39 22 15 6 2 1 - 163 - 121 112 62 49 31 15 10 19 419
New Hampshire - 70 10 2 1 - - - - 83 - 125 84 35 20 15 10 7 23 320
New Jersey - 122 151 34 26 15 12 9 17 387 - 269 565 269 230 205 169 157 477 2,341
New Mexico - 99 34 9 6 4 3 1 2 156 - 72 107 61 42 30 21 13 34 379
New York 13 228 347 141 70 48 29 19 38 920 124 149 906 624 485 398 289 258 811 3,920
North Carolina 9 397 240 75 35 17 7 4 3 778 25 352 702 412 262 153 84 54 95 2,115
North Dakota - 30 23 5 2 1 - - - 61 1 30 53 36 28 17 13 10 19 205
Ohio - 436 283 89 48 34 19 10 12 931 13 328 644 322 243 180 128 95 259 2,198
Oklahoma 15 71 112 38 21 13 7 5 5 272 19 79 219 120 81 54 35 24 37 650
Oregon - 111 82 19 10 6 4 2 1 234 9 111 279 167 117 78 55 37 67 911
Pennsylvania - 285 261 96 56 38 27 14 21 797 - 302 851 596 477 373 241 168 408 3,416
Rhode Island - 27 16 4 2 2 1 - - 52 16 27 39 41 48 53 43 38 104 392
South Carolina - 164 82 26 15 6 3 1 7 304 7 92 365 249 174 115 62 39 59 1,155
South Dakota - 11 50 16 6 3 2 - - 88 9 9 36 29 21 19 16 10 9 146
Tennessee - 348 131 41 19 7 4 2 3 557 5 589 704 264 177 107 69 52 102 2,066
Texas 3 388 567 233 141 77 31 13 6 1,456 156 798 1,915 1,153 843 610 411 328 783 6,841
Utah - 77 114 37 14 7 3 1 1 253 - 139 266 124 69 43 21 14 20 695
Vermont - 40 19 3 1 1 - - - 64 4 15 33 13 10 5 3 2 5 85
Virginia 1 159 234 67 29 17 9 3 2 521 3 141 554 355 256 188 114 80 92 1,779
Washington - 140 111 41 19 12 6 4 3 335 11 179 454 293 244 189 133 104 264 1,861
West Virginia - 124 64 17 11 8 5 2 3 235 27 44 136 71 42 30 16 12 36 387
Wisconsin 2 103 109 63 48 25 10 3 2 364 37 70 296 299 326 279 182 147 304 1,902
Wyoming - 43 35 13 6 4 2 2 1 106 - 34 59 31 19 15 8 8 15 190
U.S. Total 97 7,660 6,219 2,160 1,297 793 427 233 290 19,080 1,198 9,731 19,804 11,340 8,538 6,557 4,491 3,581 8,842 72,884
Puerto Rico 19 3 49 42 39 29 19 18 39 238 6 1 15 27 48 60 55 52 177 434
Grand Total 116 7,663 6,268 2,201 1,336 822 447 252 329 19,318 1,204 9,732 19,819 11,367 8,586 6,616 4,546 3,633 9,019 73,317

NATIONAL HIGHWAY SYSTEM LENGTH - 2019
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

September 30, 2020

INTERNATIONAL ROUGHNESS INDEX (IRI) (1)

Table HM-47 (Sheet 4 of 4)
STATE TOTAL URBAN NHS
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 27 755 541 159 89 54 33 24 63 1,717
Alaska - 64 85 39 20 13 7 4 8 239
Arizona 50 311 264 149 115 83 50 35 37 1,043
Arkansas 1 173 328 168 110 80 47 36 48 988
California 280 763 1,487 1,102 1,094 1,003 795 702 1,988 8,934
Colorado - 196 497 298 229 155 96 74 138 1,684
Connecticut - 249 376 210 146 102 66 42 84 1,275
Delaware 4 37 119 60 30 16 11 7 13 292
District of Columbia 4 - 3 4 6 9 8 11 89 130
Florida 10 1,673 2,071 707 362 213 112 67 104 5,309
Georgia - 1,111 1,356 495 239 130 71 44 70 3,516
Hawaii 1 25 66 57 57 49 32 24 65 374
Idaho 121 101 109 43 28 22 13 10 16 341
Illinois 16 501 1,130 676 526 387 257 196 410 4,083
Indiana 9 251 414 206 143 77 37 29 28 1,184
Iowa 30 157 282 200 141 97 63 47 100 1,087
Kansas 8 250 220 92 61 43 24 17 27 735
Kentucky 19 254 327 142 86 51 30 19 29 940
Louisiana 103 220 292 186 170 154 101 79 151 1,353
Maine 2 76 56 31 23 19 13 8 19 245
Maryland 7 378 517 194 128 97 72 62 197 1,646
Massachusetts 50 534 469 326 304 297 213 175 494 2,813
Michigan 29 346 909 538 409 328 240 187 425 3,382
Minnesota 8 282 461 177 95 58 33 21 39 1,167
Mississippi - 306 360 185 125 90 57 41 102 1,266
Missouri - 623 576 228 149 112 65 44 87 1,882
Montana - 77 97 42 32 21 12 11 26 318
Nebraska 7 49 124 70 55 52 38 35 108 530
Nevada - 199 151 84 64 37 17 11 20 582
New Hampshire - 195 95 37 21 16 10 7 23 403
New Jersey - 391 716 303 256 220 181 166 495 2,728
New Mexico - 171 141 69 48 34 23 14 36 535
New York 136 377 1,253 764 555 446 318 277 849 4,840
North Carolina 34 750 942 487 297 170 91 58 98 2,893
North Dakota 1 60 77 40 30 18 13 10 19 266
Ohio 13 764 926 411 291 214 147 105 271 3,130
Oklahoma 34 150 331 159 101 67 42 29 42 922
Oregon 9 222 361 186 127 84 59 39 68 1,146
Pennsylvania - 586 1,111 692 533 410 268 183 429 4,212
Rhode Island 16 54 55 45 50 54 44 38 104 444
South Carolina 7 256 448 275 189 121 65 40 66 1,459
South Dakota 9 20 85 44 27 22 17 10 9 234
Tennessee 5 937 835 305 197 115 74 54 105 2,622
Texas 158 1,186 2,482 1,386 984 687 441 341 789 8,296
Utah - 216 380 161 83 50 23 15 21 948
Vermont 4 55 51 16 10 6 3 2 5 149
Virginia 4 301 788 422 285 205 123 83 94 2,300
Washington 11 319 564 335 264 201 138 108 267 2,195
West Virginia 28 168 200 88 53 39 22 14 39 622
Wisconsin 39 173 405 363 374 304 193 150 306 2,267
Wyoming - 77 94 44 25 19 10 10 16 296
U.S. Total 1,295 17,391 26,024 13,499 9,835 7,350 4,918 3,815 9,131 91,963
Puerto Rico 24 4 64 69 86 89 74 70 216 672
Grand Total 1,320 17,395 26,087 13,568 9,922 7,438 4,992 3,885 9,348 92,635

(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.

(2) May include sections entirely on structures and unpaved miles.

 

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