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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Table HM-47 - Highway Statistics 2015

Highway Statistics 2015


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NATIONAL HIGHWAY SYSTEM LENGTH - 2015
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

December 2016
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 1 363 141 34 20 7 3 1 2 571 4 901 819 149 69 33 17 10 10 2,007
Alaska - 200 359 163 118 73 40 24 25 1,002 263 90 177 81 73 75 59 50 123 728
Arizona 1 497 290 75 32 11 4 2 4 916 32 419 447 152 84 43 17 8 6 1,175
Arkansas 0 194 137 41 18 8 5 3 3 409 2 261 859 380 219 130 60 33 32 1,974
California - 614 383 118 51 21 9 5 9 1,209 - 953 1,504 542 270 161 64 46 87 3,625
Colorado - 141 252 129 58 30 21 9 9 648 - 516 1,080 501 249 120 57 27 26 2,576
Connecticut - 12 10 4 2 0 0 0 0 29 - 10 40 27 24 20 12 6 10 150
Delaware - - - - - - - - - - 2 47 85 17 3 1 1 0 0 154
Dist. of Columbia - - - - - - - - - - - - - - - - - - - -
Florida 105 376 206 18 8 3 1 0 0 612 81 1,009 1,266 267 80 28 7 4 3 2,663
Georgia 1 239 201 55 22 10 4 2 2 534 19 908 1,585 388 135 53 21 10 15 3,114
Hawaii - - - - - - - - - - - 1 19 14 13 15 8 6 5 80
Idaho - 275 172 41 16 7 4 3 3 521 37 448 810 247 97 42 19 9 9 1,679
Illinois - 665 444 119 16 - - - - 1,243 - 351 1,126 411 249 107 52 12 4 2,311
Indiana 141 377 141 40 27 18 11 6 7 627 38 640 581 193 98 46 22 12 16 1,609
Iowa 7 246 233 81 28 9 4 2 2 605 26 852 1,071 585 365 234 122 86 78 3,393
Kansas - 427 161 32 12 4 2 1 1 639 8 1,683 1,026 179 71 33 14 8 9 3,023
Kentucky 1 444 116 31 16 9 3 1 1 622 176 762 553 125 56 26 10 6 6 1,544
Louisiana 6 194 127 85 69 32 13 4 3 527 2 164 479 194 115 75 47 27 32 1,133
Maine - 203 70 20 4 2 0 0 0 299 - 142 387 109 64 48 18 14 14 795
Maryland 0 49 74 11 4 1 1 0 1 142 1 151 147 30 14 9 5 2 4 362
Massachusetts - 19 32 7 2 1 0 0 1 64 - 16 42 28 18 8 4 3 3 121
Michigan 5 214 220 60 31 17 11 5 3 561 1 1,109 904 236 108 62 29 14 22 2,484
Minnesota - 191 274 65 30 16 10 5 3 594 11 1,172 1,105 519 294 175 92 50 49 3,456
Mississippi 2 338 137 31 20 13 7 4 4 552 - 502 760 250 143 82 35 19 22 1,813
Missouri - 470 291 48 17 9 4 2 0 842 1 1,035 1,319 362 142 69 34 17 10 2,989
Montana - 411 552 87 24 12 5 2 2 1,094 - 690 1,339 386 165 80 50 28 36 2,773
Nebraska 8 266 99 26 11 3 1 1 1 407 260 1,125 786 261 139 84 41 23 26 2,485
Nevada 0 388 30 11 8 7 2 1 0 448 14 846 494 95 22 13 14 16 24 1,525
New Hampshire - 120 20 2 0 0 - - - 142 0 168 129 33 17 12 10 7 11 388
New Jersey - 22 18 3 1 1 1 0 0 45 0 38 56 29 25 17 10 7 11 193
New Mexico 1 562 200 46 22 8 4 2 1 845 33 785 595 170 93 52 20 13 11 1,739
New York 20 273 349 77 35 17 12 9 11 783 15 259 1,062 437 221 124 63 34 37 2,237
North Carolina 10 310 162 36 19 10 2 1 1 541 57 476 1,059 303 138 57 23 15 23 2,094
North Dakota - 237 231 33 7 3 0 0 0 511 3 1,092 1,137 403 166 84 32 20 25 2,961
Ohio 1 324 221 52 23 12 5 3 2 642 4 538 807 269 110 53 22 11 12 1,823
Oklahoma - 285 240 57 28 18 9 6 3 646 7 445 934 382 205 128 64 38 43 2,238
Oregon 0 247 176 50 13 5 2 1 1 495 0 596 1,324 418 167 73 36 21 24 2,658
Pennsylvania 0 431 488 110 41 25 8 4 4 1,112 2 440 860 297 141 87 45 27 35 1,933
Rhode Island - 14 3 0 0 - 0 0 0 18 - 4 14 16 19 19 13 9 14 108
South Carolina - 116 281 85 58 3 2 0 1 546 - 44 701 388 305 78 36 24 15 1,591
South Dakota - 231 290 43 17 7 3 0 0 591 - 378 1,205 629 325 173 87 51 43 2,892
Tennessee 10 490 54 10 5 3 1 0 0 564 9 779 632 147 66 36 15 7 6 1,686
Texas - 724 945 210 67 30 11 7 6 2,001 14 1,677 3,338 1,399 664 299 124 62 55 7,617
Utah 1 388 239 41 10 4 1 1 0 683 466 185 574 276 171 110 51 29 30 1,426
Vermont 0 204 46 5 2 1 0 0 - 258 1 57 143 50 27 12 7 6 7 308
Virginia 0 161 234 49 18 5 2 0 0 469 14 167 735 282 109 44 18 9 4 1,368
Washington - 174 140 50 27 16 9 7 6 429 - 350 914 355 148 72 36 23 28 1,926
West Virginia 11 118 143 19 9 5 3 1 1 298 4 92 406 218 128 67 35 22 30 999
Wisconsin 0 194 169 60 36 26 18 6 4 512 - 721 1,033 571 369 183 104 69 108 3,158
Wyoming - 362 306 71 39 17 6 4 3 808 29 445 922 337 147 63 23 12 9 1,957
U.S. Total 333 13,800 10,107 2,540 1,141 540 263 134 132 28,657 1,633 26,535 39,388 14,139 7,141 3,713 1,805 1,059 1,261 95,041
Puerto Rico (3) - - 1 10 4 11 5 4 7 42 - - 1 3 13 2 - - - 19
Grand Total 333 13,800 10,109 2,550 1,145 551 268 138 139 28,699 1,633 26,535 39,389 14,142 7,154 3,715 1,805 1,059 1,261 95,060

NATIONAL HIGHWAY SYSTEM LENGTH - 2015
  MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

December 2016
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 5 1,264 960 183 89 41 20 11 11 2,578
Alaska 263 290 537 244 191 148 99 73 148 1,730
Arizona 33 916 737 227 116 54 22 11 10 2,091
Arkansas 2 455 996 421 237 138 65 36 35 2,383
California - 1,567 1,887 660 320 182 73 51 96 4,835
Colorado - 657 1,331 629 307 151 78 36 35 3,225
Connecticut - 22 50 32 26 20 12 6 10 178
Delaware 2 47 85 17 3 1 1 0 0 154
Dist. of Columbia - - - - - - - - - -
Florida 186 1,385 1,472 286 88 31 7 4 3 3,275
Georgia 20 1,146 1,786 442 156 63 25 12 17 3,648
Hawaii - 1 19 14 13 15 8 6 5 80
Idaho 37 723 982 288 113 48 22 12 12 2,201
Illinois - 1,016 1,569 530 265 107 52 12 4 3,555
Indiana 178 1,017 723 234 125 64 33 18 23 2,237
Iowa 33 1,097 1,304 666 394 243 126 87 80 3,998
Kansas 8 2,110 1,187 211 83 38 15 9 10 3,663
Kentucky 177 1,206 670 156 72 35 13 7 7 2,166
Louisiana 8 359 607 279 184 107 59 31 35 1,660
Maine - 345 457 129 68 50 18 14 14 1,095
Maryland 1 200 221 41 18 11 7 2 5 504
Massachusetts - 35 74 35 20 9 5 3 5 185
Michigan 5 1,322 1,124 296 139 78 40 19 25 3,044
Minnesota 11 1,363 1,379 584 324 191 102 55 52 4,050
Mississippi 2 840 896 281 163 96 42 22 25 2,365
Missouri 1 1,505 1,611 410 160 78 38 19 10 3,830
Montana - 1,101 1,891 472 190 92 54 29 38 3,867
Nebraska 268 1,391 885 287 150 87 42 24 27 2,892
Nevada 14 1,234 524 107 30 20 17 16 24 1,973
New Hampshire 0 288 149 36 17 12 10 7 11 530
New Jersey 0 60 74 32 26 18 11 7 11 238
New Mexico 34 1,347 795 216 115 61 24 14 12 2,585
New York 36 532 1,411 514 256 141 75 42 48 3,020
North Carolina 67 787 1,221 338 158 68 25 16 23 2,635
North Dakota 3 1,329 1,367 437 173 87 33 20 26 3,472
Ohio 5 862 1,029 321 133 65 27 14 14 2,465
Oklahoma 7 730 1,174 439 234 145 74 43 46 2,885
Oregon 0 842 1,501 468 179 77 38 23 25 3,153
Pennsylvania 2 872 1,348 407 183 112 53 32 39 3,044
Rhode Island - 18 17 16 19 19 13 9 14 126
South Carolina - 160 982 474 363 82 37 24 16 2,137
South Dakota - 609 1,495 672 342 180 90 52 43 3,483
Tennessee 18 1,269 686 158 71 38 16 7 6 2,250
Texas 14 2,401 4,283 1,610 732 329 135 68 61 9,618
Utah 467 573 813 317 181 114 51 30 30 2,109
Vermont 1 261 189 54 29 13 7 6 7 566
Virginia 14 328 969 331 127 49 20 9 5 1,837
Washington - 523 1,054 405 175 88 45 30 35 2,355
West Virginia 14 210 549 238 137 71 38 23 31 1,297
Wisconsin 0 914 1,201 632 405 209 122 75 112 3,670
Wyoming 29 807 1,228 408 187 79 30 15 12 2,765
U.S. Total 1,966 40,335 49,495 16,679 8,282 4,253 2,068 1,193 1,393 123,699
Puerto Rico (3) - - 3 13 17 13 5 4 7 61
Grand Total 1,966 40,335 49,498 16,692 8,298 4,266 2,073 1,197 1,400 123,759

NATIONAL HIGHWAY SYSTEM LENGTH - 2015
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

December 2016
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 2 218 109 32 25 16 11 8 8 427 131 411 431 125 65 41 25 15 24 1,138
Alaska - 17 40 11 5 3 2 1 1 79 - 15 48 26 19 14 10 8 16 156
Arizona 0 148 71 21 8 3 1 1 0 252 144 154 224 107 68 41 24 14 36 669
Arkansas 0 90 101 39 22 18 11 6 6 293 41 57 215 121 86 57 40 25 54 656
California 0 349 448 150 110 76 48 26 34 1,241 - 510 1,073 879 891 868 741 677 2,405 8,044
Colorado - 67 121 60 32 12 5 3 4 304 1 78 321 225 219 183 112 86 154 1,379
Connecticut - 130 104 40 21 11 5 4 3 317 - 55 173 136 125 103 74 60 221 946
Delaware 5 3 21 7 2 1 0 0 0 36 5 35 100 36 20 11 6 5 10 222
Dist. of Columbia - - - - 5 2 0 1 4 12 - - - 2 3 6 3 5 103 122
Florida 98 314 273 51 24 10 5 1 1 680 205 1,034 1,873 653 345 178 95 59 90 4,326
Georgia 2 357 216 66 34 17 9 6 5 710 345 620 1,031 334 181 97 56 37 96 2,451
Hawaii - 1 12 9 10 9 5 4 4 55 - 20 52 50 46 48 29 22 47 314
Idaho - 36 34 11 5 3 1 1 1 90 26 66 120 57 31 28 22 15 32 371
Illinois - 256 469 113 79 17 6 1 2 942 - 201 767 685 590 366 240 192 317 3,359
Indiana 94 148 105 64 36 21 14 8 10 404 633 309 417 196 133 91 58 40 67 1,312
Iowa 4 50 75 23 11 7 3 2 1 172 73 69 185 168 130 94 57 48 102 854
Kansas 3 101 69 29 16 9 5 2 1 232 13 148 170 62 49 32 19 17 20 517
Kentucky - 114 65 18 12 6 3 2 2 220 117 163 188 84 59 42 20 17 27 600
Louisiana 1 105 90 54 49 51 23 17 15 403 106 99 227 153 128 117 88 74 168 1,055
Maine - 33 19 6 3 2 1 1 1 66 - 11 56 24 23 15 10 7 21 166
Maryland 1 115 131 32 19 13 8 7 10 335 14 233 441 197 149 110 79 58 215 1,481
Massachusetts 2 300 140 21 11 8 5 6 15 508 54 139 302 293 285 278 212 180 466 2,155
Michigan 3 182 264 90 52 41 25 17 13 683 32 211 617 427 340 279 212 174 442 2,702
Minnesota 9 71 130 52 24 15 10 4 6 312 19 202 335 149 85 56 30 26 64 947
Mississippi - 131 63 22 16 11 5 3 2 253 7 132 285 163 112 82 57 40 136 1,007
Missouri 0 256 179 46 25 16 8 4 3 538 30 269 505 201 130 91 54 36 63 1,350
Montana - 39 44 7 3 2 1 0 1 98 6 25 61 40 25 18 13 9 20 211
Nebraska 6 20 25 8 4 2 1 1 - 61 136 32 71 46 40 39 30 28 70 356
Nevada 0 79 31 18 12 6 2 1 0 150 5 151 122 57 36 19 10 8 13 416
New Hampshire - 64 14 3 1 1 0 0 - 83 1 101 87 40 25 16 12 9 27 317
New Jersey 1 128 138 42 23 16 10 11 17 386 3 215 480 296 261 238 177 156 520 2,343
New Mexico 0 102 27 10 8 4 1 1 1 153 27 85 140 84 76 60 39 29 65 578
New York 22 209 378 116 68 46 33 22 48 919 41 133 881 623 477 385 281 238 942 3,960
North Carolina 34 267 273 82 37 15 6 3 2 686 98 240 882 469 289 168 90 57 151 2,344
North Dakota - 17 30 8 3 2 0 - 0 60 - 18 46 34 29 21 12 8 19 186
Ohio 0 349 355 96 61 36 16 9 9 931 12 370 871 498 384 302 206 157 404 3,192
Oklahoma 0 71 119 39 21 15 9 5 8 286 20 99 238 152 123 115 85 76 125 1,013
Oregon - 81 106 22 9 7 5 3 2 234 3 122 273 160 102 74 51 39 97 918
Pennsylvania 7 211 321 88 58 33 16 12 10 748 11 228 809 588 488 392 256 204 439 3,405
Rhode Island - 19 23 5 2 1 1 1 1 52 1 10 51 45 59 58 45 43 111 423
South Carolina - 48 128 65 37 19 5 2 0 304 - 36 316 340 243 132 43 27 23 1,161
South Dakota - 11 50 14 7 4 1 0 0 88 0 7 37 25 19 15 15 10 24 152
Tennessee 4 371 96 29 15 7 4 2 3 526 45 587 633 249 142 100 59 47 87 1,904
Texas 1 315 568 235 142 82 38 21 14 1,415 91 626 1,969 1,216 853 651 405 307 813 6,841
Utah 0 89 96 37 16 10 4 1 0 253 150 114 239 114 64 42 20 13 14 620
Vermont 2 35 19 4 1 1 0 - - 60 5 13 40 22 15 11 6 5 12 125
Virginia 15 152 289 104 48 26 12 6 3 638 54 166 670 421 289 207 128 88 128 2,096
Washington - 113 122 46 20 12 7 7 7 335 1 160 431 299 213 176 118 106 364 1,866
West Virginia 3 101 91 21 14 8 3 1 2 241 7 26 156 85 54 35 24 16 22 419
Wisconsin - 105 96 78 37 23 14 6 5 363 3 97 312 303 295 252 156 129 376 1,920
Wyoming - 26 45 18 7 4 2 1 2 106 11 24 70 41 28 17 11 10 22 221
U.S. Total 321 6,615 6,834 2,259 1,310 776 411 249 285 18,740 2,724 8,927 20,041 11,800 8,945 6,870 4,665 3,757 10,283 75,288
Puerto Rico (3) 2 - 30 74 47 44 28 8 6 238 2 - 2 7 11 33 21 11 25 109
Grand Total 323 6,615 6,864 2,333 1,358 821 439 257 291 18,978 2,726 8,927 20,043 11,808 8,955 6,903 4,686 3,769 10,308 75,397

NATIONAL HIGHWAY SYSTEM LENGTH - 2015
  MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

December 2016
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 133 630 540 157 89 57 36 23 33 1,565
Alaska - 32 89 37 24 17 12 8 17 235
Arizona 145 302 295 128 76 43 25 15 36 921
Arkansas 41 147 316 160 108 75 51 32 60 949
California 0 859 1,521 1,028 1,002 944 789 704 2,438 9,285
Colorado 1 145 442 285 251 196 117 89 158 1,683
Connecticut - 185 277 176 146 115 78 63 224 1,264
Delaware 11 38 122 43 22 12 6 5 10 258
Dist. of Columbia - - - 2 8 8 3 6 108 134
Florida 303 1,348 2,146 704 370 188 99 60 91 5,006
Georgia 347 977 1,246 400 215 113 65 43 101 3,161
Hawaii - 21 64 59 56 57 34 27 51 369
Idaho 26 101 154 68 36 31 23 15 33 461
Illinois - 457 1,236 797 669 383 246 193 319 4,300
Indiana 726 457 523 259 169 112 72 48 76 1,716
Iowa 77 119 260 192 142 101 60 49 104 1,025
Kansas 16 250 239 90 65 41 23 19 21 749
Kentucky 117 277 252 102 71 47 24 18 28 820
Louisiana 108 204 317 207 177 168 112 91 183 1,458
Maine - 44 75 30 27 16 11 7 22 232
Maryland 15 348 572 229 168 123 87 65 225 1,817
Massachusetts 56 439 442 314 296 287 217 186 481 2,663
Michigan 35 393 882 517 392 319 237 191 455 3,385
Minnesota 27 273 465 201 108 71 40 30 70 1,259
Mississippi 7 263 348 184 127 93 63 43 138 1,260
Missouri 30 525 685 247 155 107 63 40 66 1,888
Montana 6 64 105 47 28 20 14 10 21 309
Nebraska 142 52 96 54 44 41 31 29 70 416
Nevada 5 231 153 75 48 26 12 8 13 566
New Hampshire 1 165 101 44 26 16 12 10 27 401
New Jersey 4 343 618 338 284 254 187 166 537 2,729
New Mexico 27 187 168 93 84 64 40 30 66 731
New York 63 342 1,259 738 545 431 314 260 990 4,879
North Carolina 132 508 1,154 551 326 183 96 60 153 3,030
North Dakota - 35 76 41 31 23 12 8 19 246
Ohio 12 719 1,226 594 446 338 222 166 413 4,123
Oklahoma 20 170 356 191 144 129 94 81 132 1,299
Oregon 3 203 379 182 111 81 56 42 99 1,152
Pennsylvania 19 439 1,131 676 546 425 272 216 449 4,153
Rhode Island 1 29 74 50 62 59 46 44 112 475
South Carolina - 85 445 405 281 151 48 29 23 1,465
South Dakota 0 17 87 39 26 19 17 11 24 240
Tennessee 49 957 729 277 157 107 63 49 90 2,430
Texas 92 940 2,537 1,451 995 734 443 328 827 8,256
Utah 150 203 335 151 80 52 24 15 14 873
Vermont 6 48 60 25 16 12 6 5 12 185
Virginia 69 318 958 524 336 233 140 94 131 2,734
Washington 1 273 553 345 234 188 125 113 371 2,201
West Virginia 10 128 247 106 68 43 27 18 24 661
Wisconsin 3 202 408 381 332 274 170 134 381 2,283
Wyoming 11 50 114 59 35 20 13 11 24 327
U.S. Total 3,045 15,542 26,875 14,059 10,255 7,647 5,076 4,006 10,568 94,028
Puerto Rico (3) 4 - 32 82 58 77 49 19 31 347
Grand Total 3,048 15,542 26,907 14,141 10,313 7,723 5,125 4,025 10,599 94,375

(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) 2009 data.

 

Page last modified on December 7, 2016
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000