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Highway Statistics 2017


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NATIONAL HIGHWAY SYSTEM LENGTH - 2017
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

August 23, 2018
Table HM-47
Sheet 1 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
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 9 354 139 35 18 12 2 1 1 562 15 855 854 162 62 30 16 8 9 1,996
Alaska 1 204 341 157 114 78 45 26 35 1,001 281 86 155 75 71 76 59 49 136 707
Arizona 16 537 221 71 35 19 8 5 3 900 10 429 412 165 93 50 23 15 10 1,197
Arkansas 1 218 147 37 16 10 4 2 3 438 2 225 834 396 223 125 66 33 33 1,935
California 3 437 392 155 92 49 24 13 21 1,183 80 813 1,507 548 281 153 77 48 71 3,497
Colorado - 134 270 127 49 31 22 10 4 648 - 541 1,081 488 234 122 55 29 24 2,576
Connecticut - 17 7 3 1 0 0 0 0 29 - 23 62 35 19 10 5 3 1 158
Delaware - - - - - - - - - - 1 35 68 15 4 2 1 0 0 126
Dist. of Columbia - - - - - - - - - - - - - - - - - - - -
Florida 35 537 127 10 5 3 0 0 0 682 69 1,110 1,220 236 73 25 8 3 3 2,678
Georgia - 216 209 65 26 12 5 2 2 537 14 757 1,578 501 193 78 28 12 15 3,162
Hawaii - - - - - - - - - - - 1 22 15 11 13 8 4 6 80
Idaho - 270 180 40 18 7 3 1 1 520 20 458 817 245 103 45 22 10 11 1,710
Illinois - 716 390 76 29 18 8 4 3 1,243 - 369 1,032 490 270 181 58 39 28 2,469
Indiana 42 450 171 42 26 17 9 6 7 728 51 577 608 227 124 64 30 17 17 1,664
Iowa 20 246 219 67 33 15 6 3 2 591 194 774 1,093 583 347 193 100 64 77 3,231
Kansas - 397 173 45 15 6 2 1 0 639 8 1,740 961 181 71 39 17 8 7 3,023
Kentucky 23 419 121 28 14 10 3 1 1 598 62 790 606 143 61 27 12 7 9 1,656
Louisiana 13 183 132 87 67 32 12 4 2 520 39 137 473 209 117 73 44 24 27 1,105
Maine 0 151 79 28 14 4 2 0 0 279 2 190 308 113 54 38 23 17 36 780
Maryland - 63 59 13 4 1 1 0 1 142 0 181 142 28 10 6 3 3 3 377
Massachusetts - 36 22 3 1 0 0 0 1 63 0 63 177 81 46 26 14 9 15 431
Michigan 6 219 224 57 29 18 7 4 3 561 0 1,076 930 252 115 53 26 13 18 2,483
Minnesota - 227 267 41 28 12 6 4 2 588 0 1,257 1,123 489 286 164 81 44 44 3,488
Mississippi - 375 118 32 22 13 6 2 1 569 - 505 729 252 148 89 42 22 25 1,812
Missouri - 545 230 38 15 8 4 1 0 842 1 1,208 1,257 314 121 47 24 10 8 2,989
Montana 19 556 391 69 29 12 7 5 7 1,075 8 658 1,329 414 178 84 38 25 39 2,765
Nebraska 0 240 125 29 12 5 2 1 1 414 14 1,081 884 299 173 104 55 30 44 2,670
Nevada - 395 32 7 4 4 4 1 0 447 - 963 473 76 22 7 3 2 2 1,547
New Hampshire - 116 22 3 1 - - - - 142 - 171 138 37 17 9 5 4 6 387
New Jersey - 21 21 1 1 1 0 0 - 45 - 42 59 29 23 18 11 5 7 195
New Mexico 2 532 214 58 26 9 3 2 2 845 0 626 676 212 117 64 30 15 19 1,760
New York 2 306 323 86 42 19 10 7 8 801 140 299 1,091 362 186 105 52 31 32 2,157
North Carolina 0 325 151 33 21 13 5 2 1 551 11 553 1,075 324 128 57 27 15 16 2,194
North Dakota - 282 185 31 8 2 1 0 0 510 - 1,262 1,095 318 144 64 24 13 21 2,941
Ohio - 350 197 51 19 12 6 3 3 643 1 638 794 234 97 49 23 13 12 1,861
Oklahoma 0 307 245 46 23 12 7 4 2 646 10 402 965 391 205 113 62 40 44 2,222
Oregon - 244 177 52 15 4 2 1 1 495 1 582 1,328 422 182 77 34 20 11 2,656
Pennsylvania - 451 435 104 52 22 11 6 6 1,086 - 457 854 278 149 85 45 27 39 1,933
Rhode Island - 15 3 0 - - - - - 18 - 8 13 16 19 19 12 8 12 108
South Carolina - 181 239 61 31 20 8 4 3 546 0 216 712 311 175 88 42 24 21 1,590
South Dakota - 221 294 47 17 7 4 1 0 591 - 416 1,237 606 309 167 80 45 30 2,891
Tennessee 0 528 85 16 9 4 1 1 0 644 2 805 668 147 69 31 14 6 3 1,744
Texas 11 946 793 160 56 21 8 3 2 1,990 34 2,404 3,158 1,176 508 226 92 37 30 7,631
Utah 0 329 277 59 12 4 2 1 1 684 12 170 516 244 124 63 25 9 10 1,162
Vermont 1 192 52 7 3 1 1 0 - 255 0 102 119 36 19 14 5 5 7 306
Virginia - 252 271 45 17 9 2 1 0 598 22 277 883 306 135 62 24 10 5 1,703
Washington - 170 145 41 28 18 10 8 9 429 - 333 927 351 147 72 38 25 32 1,925
West Virginia 1 143 135 21 10 5 3 1 1 319 1 102 446 214 117 67 32 20 18 1,016
Wisconsin - 221 140 70 40 24 7 5 5 512 - 840 944 579 359 183 98 63 89 3,155
Wyoming - 483 215 57 30 14 4 3 2 807 6 692 842 268 106 40 15 8 7 1,977
U.S. Total 205 14,755 9,406 2,415 1,177 617 288 153 145 28,957 1,110 28,297 39,279 13,892 6,844 3,598 1,732 990 1,191 95,824
Puerto Rico (3) 6 1 7 7 2 3 2 3 13 38 37 - - 0 1 1 1 1 2 6
Grand Total 211 14,756 9,413 2,422 1,179 620 290 156 159 28,995 1,147 28,297 39,279 13,893 6,845 3,599 1,733 992 1,193 95,830

NATIONAL HIGHWAY SYSTEM LENGTH - 2017
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

August 23, 2018
Table HM-47
Sheet 2 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
TOTAL RURAL NHS
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 24 1,209 992 197 81 41 18 10 10 2,558
Alaska 282 291 496 232 185 154 104 75 171 1,708
Arizona 26 966 634 236 129 69 31 20 13 2,097
Arkansas 3 443 982 432 239 136 70 35 36 2,373
California 83 1,250 1,899 703 373 202 101 62 91 4,679
Colorado - 676 1,351 616 283 154 77 39 28 3,224
Connecticut - 40 70 38 19 11 5 3 2 186
Delaware 1 35 68 15 4 2 1 0 0 126
Dist. of Columbia - - - - - - - - - -
Florida 104 1,647 1,346 246 79 28 8 4 3 3,361
Georgia 14 973 1,787 566 219 90 33 14 17 3,699
Hawaii - 1 22 15 11 13 8 4 6 80
Idaho 20 727 997 285 121 52 25 11 12 2,230
Illinois - 1,085 1,421 566 299 199 67 44 31 3,712
Indiana 93 1,027 780 269 149 81 40 23 24 2,392
Iowa 214 1,019 1,312 650 381 208 106 67 79 3,822
Kansas 8 2,136 1,134 226 87 45 19 9 7 3,663
Kentucky 85 1,209 728 172 76 37 16 8 9 2,254
Louisiana 52 320 605 296 184 105 56 29 30 1,624
Maine 2 341 387 141 68 43 25 18 36 1,059
Maryland 0 244 202 40 14 7 4 4 4 519
Massachusetts 0 99 199 84 47 27 14 9 16 494
Michigan 6 1,295 1,154 308 144 71 34 17 21 3,044
Minnesota 0 1,484 1,391 531 314 176 88 48 45 4,076
Mississippi - 879 847 284 171 102 48 23 26 2,381
Missouri 1 1,753 1,487 352 136 55 27 12 9 3,830
Montana 27 1,215 1,721 482 207 96 45 29 45 3,840
Nebraska 14 1,320 1,010 328 185 109 56 31 45 3,084
Nevada - 1,358 505 83 26 11 7 2 2 1,995
New Hampshire - 287 159 41 18 9 5 4 6 529
New Jersey - 62 80 31 24 19 11 6 7 240
New Mexico 2 1,158 890 270 143 73 34 17 21 2,605
New York 142 605 1,413 448 227 124 62 39 40 2,958
North Carolina 11 878 1,226 357 148 70 32 17 17 2,745
North Dakota - 1,544 1,280 350 152 66 25 14 21 3,451
Ohio 1 988 992 285 117 62 29 17 15 2,503
Oklahoma 10 709 1,210 437 228 125 69 43 46 2,868
Oregon 1 826 1,505 473 197 81 36 21 12 3,151
Pennsylvania - 908 1,289 382 201 107 56 33 44 3,019
Rhode Island - 23 16 16 19 19 12 8 12 126
South Carolina 0 398 951 372 206 108 50 27 24 2,137
South Dakota - 637 1,531 653 326 174 84 46 30 3,482
Tennessee 2 1,333 753 163 79 35 15 7 4 2,388
Texas 45 3,350 3,950 1,336 564 247 100 40 32 9,621
Utah 12 499 793 303 136 67 27 10 11 1,846
Vermont 1 294 171 43 22 15 5 5 7 561
Virginia 22 529 1,154 351 153 71 27 11 5 2,300
Washington - 503 1,072 392 175 90 48 33 41 2,354
West Virginia 1 245 581 236 127 72 35 20 19 1,335
Wisconsin - 1,061 1,084 650 398 206 105 68 94 3,668
Wyoming 6 1,175 1,057 324 135 54 20 11 9 2,785
U.S. Total 1,315 43,052 48,686 16,308 8,022 4,215 2,019 1,143 1,336 124,781
Puerto Rico (3) 43 1 7 7 3 4 3 5 15 44
Grand Total 1,358 43,053 48,692 16,315 8,024 4,219 2,022 1,148 1,351 124,825

NATIONAL HIGHWAY SYSTEM LENGTH - 2017
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

August 23, 2018
Table HM-47
Sheet 3 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
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 4 246 82 34 26 18 12 7 4 429 18 395 486 149 80 51 35 19 49 1,264
Alaska 1 14 40 13 7 2 1 0 1 78 6 18 41 30 21 14 11 7 13 155
Arizona 3 152 60 21 10 3 2 1 0 249 36 177 200 117 101 71 51 34 33 784
Arkansas - 105 105 43 20 16 8 6 8 310 5 49 213 129 89 61 40 30 62 673
California 2 243 412 213 147 99 59 43 53 1,268 128 374 1,045 991 1,040 993 804 707 2,059 8,013
Colorado - 57 123 54 38 16 8 5 3 304 1 110 371 237 199 154 95 71 141 1,379
Connecticut - 154 102 32 16 7 3 2 1 317 - 102 248 175 140 106 64 42 80 958
Delaware 1 3 19 9 3 2 2 1 1 40 3 35 113 43 22 14 8 6 14 254
Dist. of Columbia 0 - 1 - 4 - 2 - 4 12 1 - 2 - 15 - 28 - 77 121
Florida 78 382 234 45 23 10 4 1 1 700 196 1,143 1,871 602 309 180 91 58 90 4,343
Georgia - 334 236 72 33 18 8 5 4 710 32 531 1,164 437 241 139 82 57 135 2,787
Hawaii - 1 13 11 10 9 6 3 3 55 3 22 49 47 49 43 31 21 51 312
Idaho 0 44 36 6 3 1 1 0 0 91 19 61 114 54 36 26 17 12 28 348
Illinois - 335 395 93 53 32 16 9 7 942 - 159 777 619 484 382 263 203 397 3,283
Indiana 66 187 104 56 31 21 12 7 7 425 53 198 200 100 67 44 27 18 24 678
Iowa 6 57 66 21 10 6 4 3 2 170 76 84 190 156 125 91 54 42 107 849
Kansas 1 117 63 24 15 10 3 1 1 234 9 142 168 68 45 33 18 12 20 505
Kentucky 4 107 67 18 11 9 3 1 2 217 56 188 215 90 58 44 29 18 39 682
Louisiana 10 103 87 51 50 50 25 17 13 395 119 83 225 158 136 120 84 73 151 1,031
Maine 0 50 23 7 5 1 0 0 0 87 2 13 52 35 26 15 12 8 18 178
Maryland 0 141 120 27 15 11 6 5 12 338 8 236 391 160 114 94 65 57 175 1,292
Massachusetts 2 321 122 24 12 12 6 4 10 510 36 196 349 309 300 283 218 181 458 2,294
Michigan 3 173 269 86 58 41 23 17 15 682 3 229 618 447 353 290 214 179 406 2,733
Minnesota 0 86 140 47 21 16 7 4 4 325 3 199 324 132 71 45 27 17 30 847
Mississippi - 146 48 22 15 11 5 3 3 253 - 138 301 162 113 84 54 39 119 1,010
Missouri - 308 137 41 24 15 7 4 2 538 2 322 445 185 125 93 58 39 74 1,341
Montana 1 41 41 7 3 3 1 1 1 97 5 24 59 37 26 19 13 11 26 216
Nebraska 1 22 28 9 4 3 1 1 1 68 61 28 89 48 41 37 32 28 93 397
Nevada - 75 39 17 13 8 2 1 1 155 - 126 105 58 48 31 21 10 21 420
New Hampshire - 65 14 3 1 0 - 0 0 83 0 115 85 34 21 16 12 9 29 320
New Jersey - 134 133 41 25 15 11 11 16 387 1 257 525 291 250 226 178 155 460 2,343
New Mexico 0 97 41 9 3 2 1 0 0 153 1 78 103 63 45 31 16 12 22 370
New York 9 225 374 127 65 44 33 23 40 931 222 130 880 617 467 383 272 234 850 3,832
North Carolina 0 304 252 80 42 20 12 6 4 721 21 306 751 422 263 152 95 57 116 2,161
North Dakota - 22 26 7 4 1 1 0 0 61 - 24 58 35 28 19 13 9 23 208
Ohio 1 384 319 95 54 37 19 10 12 930 15 329 635 328 253 191 119 96 256 2,207
Oklahoma 3 89 109 34 19 14 8 5 6 283 6 88 211 123 88 58 30 26 39 663
Oregon - 75 107 25 12 8 4 2 1 234 15 109 282 165 119 83 55 36 63 912
Pennsylvania - 241 299 93 64 37 20 11 10 775 - 268 851 589 496 371 242 185 363 3,364
Rhode Island 0 19 24 5 2 1 1 0 0 52 6 21 51 44 53 53 42 40 114 417
South Carolina - 85 118 39 27 16 10 5 4 304 0 68 376 262 182 125 61 35 52 1,161
South Dakota - 16 49 14 5 2 1 0 0 88 - 6 38 29 28 19 14 12 10 155
Tennessee 3 382 100 36 17 10 4 2 2 554 5 597 713 271 172 106 67 47 93 2,066
Texas 16 428 543 216 135 72 27 13 7 1,442 222 762 1,865 1,113 813 612 412 330 793 6,700
Utah 0 70 112 38 18 10 3 2 1 253 8 126 262 121 75 41 23 14 18 681
Vermont - 46 12 3 2 1 0 0 0 64 3 16 38 18 13 9 4 4 8 110
Virginia 13 152 223 68 33 20 7 4 2 508 27 132 550 336 248 184 115 75 79 1,718
Washington - 113 124 43 22 11 7 6 8 335 7 163 436 280 225 172 119 109 359 1,864
West Virginia - 102 85 20 14 7 3 2 1 235 3 21 166 84 53 33 18 17 21 411
Wisconsin - 104 107 59 46 24 12 7 5 364 - 124 283 308 299 242 151 132 389 1,928
Wyoming - 36 35 17 8 4 3 1 2 106 1 29 58 30 19 13 9 7 18 184
U.S. Total 232 7,192 6,417 2,174 1,295 806 428 263 287 18,861 1,448 9,149 19,641 11,336 8,682 6,697 4,615 3,641 9,164 72,924
Puerto Rico (3) 24 2 44 44 35 27 18 14 48 233 361 - 2 5 8 12 10 9 31 78
Grand Total 256 7,194 6,461 2,218 1,330 833 446 277 335 19,094 1,809 9,149 19,643 11,340 8,690 6,709 4,625 3,650 9,196 73,002

NATIONAL HIGHWAY SYSTEM LENGTH - 2017
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

August 23, 2018
Table HM-47
Sheet 4 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
TOTAL URBAN NHS
NOT REPORTED (2) < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 22 640 568 183 106 69 48 25 53 1,693
Alaska 7 32 80 43 28 16 12 8 13 232
Arizona 39 329 260 137 111 74 52 35 34 1,033
Arkansas 5 154 317 172 109 77 49 36 70 984
California 131 618 1,457 1,204 1,187 1,092 863 750 2,111 9,281
Colorado 1 167 494 291 237 170 102 76 144 1,683
Connecticut - 256 350 207 156 114 68 44 81 1,275
Delaware 3 37 133 51 25 16 10 7 15 294
Dist. of Columbia 1 - 3 - 19 - 30 - 81 133
Florida 275 1,525 2,105 647 332 190 95 59 90 5,043
Georgia 32 866 1,400 509 274 157 90 62 139 3,497
Hawaii 3 23 61 57 59 52 37 23 55 367
Idaho 19 104 151 60 39 27 18 12 29 439
Illinois - 494 1,172 712 537 414 279 212 405 4,225
Indiana 119 384 303 156 99 66 39 25 31 1,103
Iowa 82 141 256 177 136 97 58 46 109 1,019
Kansas 10 259 231 92 59 43 22 13 20 739
Kentucky 60 295 282 109 69 53 32 19 41 899
Louisiana 129 186 312 209 186 170 109 91 164 1,426
Maine 2 63 74 42 30 17 12 9 18 265
Maryland 8 376 512 188 128 105 71 62 187 1,630
Massachusetts 38 517 471 333 312 294 224 185 469 2,804
Michigan 6 401 886 533 411 331 237 196 420 3,415
Minnesota 3 285 464 179 92 61 35 21 35 1,172
Mississippi - 285 349 184 128 94 60 42 121 1,263
Missouri 2 630 582 226 149 108 66 43 76 1,880
Montana 6 65 100 44 29 22 14 11 27 312
Nebraska 62 50 117 56 45 40 33 29 94 465
Nevada - 201 144 75 61 39 22 10 22 575
New Hampshire 0 180 99 37 21 17 12 9 29 403
New Jersey 1 392 658 332 275 241 189 166 476 2,729
New Mexico 2 175 144 72 48 32 17 12 22 523
New York 231 355 1,254 744 532 427 305 257 890 4,763
North Carolina 22 609 1,003 502 305 172 107 63 120 2,882
North Dakota - 46 84 42 31 20 13 9 23 269
Ohio 16 713 954 423 307 228 138 106 267 3,137
Oklahoma 9 178 320 156 106 72 38 31 45 947
Oregon 15 184 390 190 131 90 59 38 64 1,147
Pennsylvania - 509 1,150 681 560 408 262 196 373 4,139
Rhode Island 7 40 75 49 55 53 42 40 114 469
South Carolina 0 153 494 300 209 141 71 40 56 1,465
South Dakota - 22 86 42 33 21 16 12 10 243
Tennessee 9 978 812 307 189 116 72 49 95 2,619
Texas 238 1,191 2,408 1,329 948 684 439 343 800 8,142
Utah 8 196 374 159 93 51 25 16 19 934
Vermont 3 61 50 22 15 10 4 4 9 174
Virginia 40 284 773 404 281 204 122 78 81 2,227
Washington 7 276 560 323 248 184 126 116 367 2,199
West Virginia 3 123 251 104 67 40 21 18 22 646
Wisconsin - 227 391 367 345 266 164 139 394 2,292
Wyoming 1 65 93 47 27 17 13 9 19 290
U.S. Total 1,679 16,340 26,058 13,509 9,977 7,503 5,043 3,903 9,451 91,785
Puerto Rico (3) 386 2 46 49 44 39 28 23 80 311
Grand Total 2,065 16,342 26,104 13,558 10,020 7,542 5,071 3,927 9,531 92,096

(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.

(3) Data may be incomplete.

 

Page last modified on November 27, 2018
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000