Skip to contentUnited States Department of Transportation - Federal Highway Administration FHWA HomeFeedback
Highway Statistics 2005 OHPI > Highway Statistics > 2005 > Roadway Extent, Characteristics, and Performance > Table HM-47

NATIONAL HIGHWAY SYSTEM LENGTH - 2005

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

OCTOBER 2006 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 - 32 359 55 26 10 33 17 19 551 - 234 1,012 497 243 60 22 5 19 2,092
Alaska - 17 287 268 252 147 5 17 21 1,014 156 19 166 144 61 163 51 21 185 810
Arizona 2 738 221 15 5 - - - - 979 12 521 342 156 44 31 8 1 - 1,103
Arkansas 1 202 182 43 17 9 9 3 - 465 6 61 764 598 253 110 27 13 4 1,830
California - 278 531 241 169 56 14 22 13 1,324 3 441 1,772 799 371 114 21 4 2 3,524
Colorado - 84 290 177 89 38 7 - 1 686 - 160 967 385 254 44 34 9 13 1,866
Connecticut - 1 34 7 1 1 - - - 44 - 5 43 49 45 11 2 3 - 158
Delaware - - - - - - - - - - - 4 95 55 15 1 - - - 170
Dist. of Columbia - - - - - - - - - - - - - - - - - - - -
Florida 5 462 278 4 - - - - - 744 4 503 891 85 24 3 - - - 1,506
Georgia - 445 247 23 1 - - - - 716 - 1,283 750 93 13 - 3 - - 2,142
Hawaii - - - 1 5 - - - - 6 - - 12 27 27 28 7 4 - 105
Idaho - 44 352 78 42 3 - 2 - 521 14 64 982 329 205 47 6 3 - 1,636
Illinois - 334 699 288 87 52 - - 3 1,463 - 88 626 388 380 138 85 46 16 1,767
Indiana 3/ - 149 542 114 33 15 - - - 853 1 242 590 266 112 78 31 9 1 1,329
Iowa - 95 249 176 73 22 8 2 3 628 45 231 651 526 259 148 87 43 44 1,989
Kansas 10 82 415 97 52 - - - - 646 47 647 1,658 185 31 12 4 3 1 2,541
Kentucky 1 212 220 80 28 12 - - - 552 - 385 1,015 198 136 6 - 1 - 1,741
Louisiana 56 136 138 105 60 31 7 - - 477 24 98 398 194 156 59 61 26 15 1,007
Maine - 92 160 30 15 1 - - - 298 - 99 364 146 84 47 20 10 19 789
Maryland 1 22 124 28 6 1 1 - - 182 8 79 248 73 36 13 3 1 - 453
Massachusetts - 21 30 23 - 16 - - - 90 - - 45 62 44 13 1 1 - 166
Michigan - 48 208 135 115 56 29 11 7 609 - 516 863 393 170 143 38 7 13 2,143
Minnesota - 28 340 144 134 34 - - - 680 - 672 1,056 511 277 28 13 4 1 2,562
Mississippi - 66 348 37 22 1 - 5 6 485 - 200 819 267 204 90 4 13 28 1,625
Missouri - 202 367 130 75 20 3 2 - 799 3 269 973 518 372 235 118 70 20 2,575
Montana - 379 658 38 29 19 5 1 - 1,129 - 486 1,581 369 146 21 10 2 1 2,616
Nebraska - 129 224 29 16 17 9 - - 424 356 141 774 497 206 164 82 70 22 1,956
Nevada - 380 48 16 6 - - - - 450 - 1,114 296 11 1 - 1 - - 1,423
New Hampshire - 29 121 - - 1 - - - 151 - 39 198 92 25 20 15 5 18 412
New Jersey - 5 18 20 11 4 4 2 - 64 8 - 49 95 45 39 13 8 2 251
New Mexico - 549 257 33 3 3 - - - 845 - 881 519 205 71 29 2 1 1 1,709
New York 4/ 15 99 426 139 82 61 41 36 47 931 22 95 918 336 154 113 91 31 62 1,800
North Carolina - 26 312 65 47 57 5 3 6 521 - 138 1,059 398 195 86 44 21 11 1,952
North Dakota - 166 231 100 13 11 - - - 521 - 306 869 375 266 192 39 13 28 2,088
Ohio - 300 351 43 25 5 - - - 724 - 275 836 308 142 45 9 5 5 1,625
Oklahoma - 174 328 76 81 17 7 1 - 684 11 177 846 447 250 186 93 33 24 2,056
Oregon - 80 414 58 2 - - - - 554 9 218 987 798 456 99 28 3 22 2,611
Pennsylvania 1 297 452 203 79 23 7 5 3 1,069 2 187 773 445 225 115 42 15 5 1,807
Rhode Island - 1 21 - - - - - - 22 - - 2 7 10 9 7 8 5 48
South Carolina - 180 262 96 30 9 - - - 577 - 45 740 221 91 11 2 4 1 1,115
South Dakota - 45 324 216 20 6 - - - 611 63 146 937 351 268 171 111 89 54 2,127
Tennessee - 589 77 9 16 - - - - 691 - 592 642 135 34 7 5 2 1 1,418
Texas - 478 1,254 322 97 38 1 1 - 2,191 3 583 3,338 1,892 509 105 34 12 - 6,473
Utah - 154 384 105 36 11 16 11 3 720 - 72 492 246 97 53 9 1 - 970
Vermont - 148 96 27 4 1 - 4 - 280 - 36 174 38 31 16 11 4 12 322
Virginia - 88 547 12 15 3 - - - 665 - 78 779 330 94 70 28 4 2 1,385
Washington - 154 156 64 43 37 10 3 - 467 - 325 1,197 318 119 42 33 2 8 2,044
West Virginia - 85 212 33 37 21 - 1 8 397 - 68 505 299 138 36 11 11 5 1,073
Wisconsin - 80 244 103 28 13 1 9 1 479 - 627 939 528 212 106 47 23 9 2,491
Wyoming - 265 438 93 3 13 10 - 1 823 5 461 1,128 280 76 4 1 5 1 1,956
U.S. Total 92 8,670 14,476 4,199 2,030 895 232 158 142 30,802 802 13,911 37,680 15,965 7,677 3,361 1,414 669 680 81,357
Puerto Rico - - 1 1 9 17 3 1 - 32 2 - 1 4 12 2 7 2 - 28
Grand Total 92 8,670 14,477 4,200 2,039 912 235 159 142 30,834 804 13,911 37,681 15,969 7,689 3,363 1,421 671 680 81,385
OCTOBER 2006 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 - 266 1,371 553 270 70 55 21 38 2,644
Alaska 156 36 453 411 312 310 56 37 206 1,821
Arizona 14 1,259 563 171 49 31 8 1 - 2,082
Arkansas 7 263 947 641 270 118 36 16 4 2,295
California 3 718 2,303 1,040 541 171 35 26 15 4,849
Colorado - 243 1,257 562 344 82 41 9 14 2,552
Connecticut - 5 76 56 45 13 2 3 - 200
Delaware - 4 95 55 15 1 - - - 170
Dist. of Columbia - - - - - - - - - -
Florida 9 965 1,169 89 24 3 - - - 2,250
Georgia - 1,728 997 116 13 - 3 - - 2,857
Hawaii - - 12 28 32 28 7 4 - 111
Idaho 14 108 1,334 408 246 50 6 5 - 2,157
Illinois - 422 1,325 676 467 189 86 46 18 3,229
Indiana 3/ 1 390 1,132 379 145 93 31 9 1 2,180
Iowa 45 326 900 702 331 170 95 45 47 2,616
Kansas 57 729 2,073 282 83 12 4 3 1 3,187
Kentucky 1 597 1,235 278 164 18 - 1 - 2,293
Louisiana 80 234 536 300 216 89 68 26 15 1,484
Maine - 191 524 176 99 48 20 10 19 1,087
Maryland 10 100 372 101 42 15 4 1 1 636
Massachusetts - 21 75 85 44 30 1 1 - 257
Michigan - 564 1,071 528 286 198 67 18 19 2,751
Minnesota - 701 1,396 655 411 63 13 4 1 3,244
Mississippi - 265 1,167 305 226 91 4 18 34 2,110
Missouri 3 472 1,341 648 448 255 121 72 20 3,377
Montana - 864 2,239 408 176 40 15 3 1 3,746
Nebraska 356 270 998 526 221 182 91 70 22 2,380
Nevada - 1,494 344 26 7 1 1 - - 1,873
New Hampshire - 68 319 92 25 20 15 5 18 562
New Jersey 8 5 67 116 56 43 17 10 2 316
New Mexico - 1,430 776 238 74 33 2 1 1 2,555
New York 4/ 37 194 1,344 475 236 174 132 67 109 2,731
North Carolina - 163 1,371 464 243 142 50 25 17 2,475
North Dakota - 472 1,100 475 278 204 39 13 28 2,609
Ohio - 575 1,188 351 166 50 10 5 5 2,350
Oklahoma 11 350 1,174 524 331 203 100 34 24 2,740
Oregon 9 298 1,401 856 458 100 28 3 22 3,166
Pennsylvania 3 484 1,225 648 304 138 49 20 9 2,877
Rhode Island - 1 22 7 10 9 7 8 5 69
South Carolina - 225 1,002 317 120 20 2 4 1 1,691
South Dakota 63 190 1,261 567 287 177 111 89 54 2,736
Tennessee - 1,180 719 144 49 7 5 2 2 2,108
Texas 3 1,062 4,593 2,214 606 144 35 13 - 8,667
Utah - 227 877 351 133 64 25 11 3 1,691
Vermont - 184 269 65 35 17 12 7 12 601
Virginia - 166 1,327 342 109 74 28 4 2 2,052
Washington - 480 1,353 383 162 79 43 4 8 2,512
West Virginia - 153 718 331 175 57 11 12 13 1,470
Wisconsin - 707 1,183 631 241 119 48 32 10 2,971
Wyoming 5 726 1,566 373 78 18 11 5 2 2,779
U.S. Total 895 22,575 52,160 20,169 9,703 4,263 1,650 823 823 112,166
Puerto Rico 2 - 2 4 21 19 10 3 - 59
Grand Total 897 22,575 52,162 20,173 9,724 4,282 1,660 826 823 112,225

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

OCTOBER 2006 Table HM-47
SHEET 3 OF 4
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE SYSTEM OTHER
NOT REPORTED < 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 - 29 161 58 25 19 10 21 34 357 - 97 265 148 118 55 17 13 13 726
Alaska - 12 30 16 10 1 - - - 69 - 2 16 26 15 9 4 4 1 77
Arizona - 85 65 27 8 1 - - - 186 19 77 156 115 60 28 8 4 3 451
Arkansas - 24 93 25 16 19 4 4 3 188 11 5 65 61 36 27 20 13 11 238
California 2 69 357 206 238 113 107 37 7 1,134 2 76 454 431 223 208 113 64 79 1,648
Colorado - 16 96 82 41 16 17 2 - 270 1 32 222 152 162 76 48 33 23 748
Connecticut - 27 135 76 41 11 5 4 3 302 - 10 102 147 82 49 27 20 22 459
Delaware 1 5 16 13 2 2 1 1 - 40 - 2 56 44 13 4 3 3 3 128
Dist. of Columbia - - - - 4 1 1 1 5 12 - - - - 1 5 6 4 54 70
Florida 5 325 350 31 5 5 1 - - 717 8 268 843 161 52 20 16 6 7 1,373
Georgia - 351 149 23 5 - - - - 528 - 493 370 76 19 11 5 - - 974
Hawaii - 1 5 12 7 11 7 3 4 50 - 14 20 31 33 48 23 10 13 192
Idaho - 10 60 9 - 4 - 5 4 92 3 6 31 30 18 10 7 5 5 112
Illinois - 35 243 195 114 80 24 12 4 707 - 24 198 422 318 265 150 119 278 1,774
Indiana 3/ - 15 153 70 42 30 5 1 - 316 5 18 93 96 53 56 35 12 15 378
Iowa 2 10 51 31 23 12 10 7 9 153 28 16 89 92 52 40 28 23 40 380
Kansas 21 12 94 59 30 1 - - - 196 63 27 159 36 7 11 9 2 6 257
Kentucky 1 44 97 47 17 1 3 - - 209 - 38 206 59 35 37 6 4 4 389
Louisiana 53 38 101 59 36 58 15 5 4 316 32 23 168 101 48 93 61 68 79 641
Maine - 7 40 16 4 - 1 - - 68 - 5 43 22 20 16 13 7 10 136
Maryland 10 32 143 55 23 12 12 6 4 287 11 30 178 100 60 40 20 15 63 506
Massachusetts 5 48 262 106 22 36 2 1 1 478 21 18 200 202 173 201 170 127 115 1,206
Michigan - 43 215 132 94 69 36 19 26 634 3 41 283 231 235 177 145 82 176 1,370
Minnesota - 11 115 51 28 23 6 - - 234 - 46 171 129 75 49 10 6 5 491
Mississippi - 27 98 29 21 13 4 3 - 195 - 23 134 110 41 46 16 13 24 407
Missouri - 49 192 60 33 25 7 10 4 380 - 25 164 148 158 81 40 21 22 659
Montana 1 11 36 2 - 4 6 1 - 60 1 4 18 12 12 6 6 2 5 65
Nebraska - 4 26 7 3 9 6 2 - 57 31 3 4 21 28 63 36 32 58 245
Nevada - 39 27 16 16 11 2 - - 111 3 54 52 24 10 4 1 2 3 150
New Hampshire - 16 51 7 - - - - - 74 - 26 87 31 13 6 2 2 2 169
New Jersey 7 13 81 99 89 32 19 17 10 360 17 - 147 299 305 255 124 89 152 1,371
New Mexico - 53 69 12 10 7 2 1 1 155 - 38 80 43 30 14 6 6 9 226
New York 4/ 17 54 269 123 92 56 35 28 54 711 72 24 297 297 235 182 137 90 322 1,584
North Carolina - 27 280 105 58 36 18 8 30 562 - 15 333 185 116 63 32 16 18 778
North Dakota - 2 37 10 2 - - - - 51 - - 8 29 11 6 5 5 3 67
Ohio - 237 416 135 38 12 7 3 2 850 - 138 447 264 174 90 41 22 46 1,222
Oklahoma 8 37 93 37 20 20 11 9 14 241 4 25 125 60 56 36 25 20 14 361
Oregon 1 16 129 20 5 1 - - - 171 5 21 124 85 65 33 31 18 20 397
Pennsylvania 12 108 295 168 59 27 8 5 3 673 9 101 486 440 354 266 137 76 70 1,930
Rhode Island - 9 25 13 2 - - - - 49 - - 35 39 27 17 11 8 14 151
South Carolina - 63 147 37 14 4 1 - - 266 - 12 256 160 113 61 24 18 27 671
South Dakota - 1 36 21 6 4 1 - - 69 8 - 10 9 16 12 8 3 6 64
Tennessee - 207 154 28 11 7 4 2 1 414 - 211 281 100 59 41 16 10 22 740
Texas 3 89 409 258 183 74 18 8 1 1,040 68 96 921 834 680 465 239 151 245 3,631
Utah - 52 91 59 13 4 - - - 219 2 53 114 42 35 12 4 6 1 267
Vermont - 10 17 4 3 7 - - - 41 - - 15 12 9 5 6 3 6 56
Virginia 4 21 177 117 66 48 13 2 3 447 34 6 286 282 132 102 65 34 48 955
Washington - 97 98 39 24 20 13 2 4 297 2 68 241 118 61 36 26 22 38 610
West Virginia - 29 80 23 16 4 5 1 1 159 2 11 97 38 18 12 7 4 4 191
Wisconsin 4 31 135 52 19 12 9 1 - 259 6 44 205 188 161 132 86 59 86 961
Wyoming - 24 31 10 9 5 8 1 2 90 - 21 30 17 6 2 1 2 3 82
U.S. Total 157 2,575 6,530 2,890 1,647 967 464 233 238 15,544 471 2,387 9,385 6,799 4,833 3,583 2,076 1,378 2,293 32,734
Puerto Rico 1 - 16 41 55 70 20 23 8 233 4 - 1 15 17 25 17 9 18 102
Grand Total 158 2,575 6,546 2,931 1,702 1,037 484 256 246 15,777 475 2,387 9,386 6,814 4,850 3,608 2,093 1,387 2,311 32,836
OCTOBER 2006 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 - 126 426 207 144 75 27 34 47 1,086
Alaska - 15 46 42 24 10 4 4 1 146
Arizona 19 163 222 142 68 30 8 4 3 640
Arkansas 11 28 158 86 52 46 24 17 14 425
California 4 145 811 638 461 321 220 100 86 2,782
Colorado 1 48 318 233 203 92 65 35 23 1,017
Connecticut - 37 237 224 123 60 32 24 25 762
Delaware 1 7 72 56 15 6 3 4 4 167
Dist. of Columbia - - - - 5 7 7 4 59 82
Florida 13 593 1,193 192 58 25 17 6 7 2,091
Georgia - 844 519 99 24 11 5 - - 1,502
Hawaii - 14 25 43 40 59 30 12 18 241
Idaho 3 15 90 39 18 14 7 10 9 202
Illinois - 58 441 617 432 345 174 132 282 2,481
Indiana 3/ 5 33 246 166 95 86 40 14 15 695
Iowa 30 26 140 123 75 52 38 29 49 532
Kansas 84 40 253 95 37 13 9 2 6 455
Kentucky 1 82 303 106 52 37 9 4 4 597
Louisiana 85 60 269 160 84 152 76 73 84 958
Maine - 11 83 38 23 16 14 7 10 202
Maryland 21 62 321 155 83 52 32 21 67 793
Massachusetts 26 67 462 308 195 237 172 128 116 1,685
Michigan 3 84 499 363 329 246 182 102 202 2,007
Minnesota - 57 285 180 103 72 16 6 6 725
Mississippi - 50 232 139 62 59 20 16 25 603
Missouri - 74 356 209 191 106 47 31 27 1,041
Montana 2 16 54 15 12 10 11 3 5 126
Nebraska 32 7 31 28 31 71 42 34 59 303
Nevada 3 93 78 40 25 15 3 2 3 259
New Hampshire - 42 138 38 13 6 2 2 2 243
New Jersey 23 13 228 397 393 288 144 105 163 1,731
New Mexico - 91 149 55 40 21 8 7 10 381
New York 4/ 89 78 566 420 327 238 172 118 376 2,295
North Carolina - 42 613 290 174 100 50 24 47 1,340
North Dakota - 2 45 39 13 6 5 5 3 118
Ohio - 375 863 399 212 102 48 25 49 2,073
Oklahoma 12 63 217 97 76 55 37 29 27 601
Oregon 6 37 253 105 70 34 32 18 20 569
Pennsylvania 21 209 782 608 414 293 145 81 73 2,605
Rhode Island - 9 60 53 28 17 12 8 14 201
South Carolina - 75 402 196 127 65 25 18 27 935
South Dakota 8 1 46 30 22 17 9 3 6 134
Tennessee - 417 435 127 70 48 20 12 23 1,152
Texas 70 185 1,329 1,092 863 538 257 159 246 4,669
Utah 2 105 205 101 48 16 4 6 1 486
Vermont - 11 32 16 11 11 6 3 6 96
Virginia 38 27 463 399 199 150 78 37 51 1,404
Washington 2 165 339 157 85 55 39 24 43 907
West Virginia 2 40 177 61 34 15 13 5 5 350
Wisconsin 10 75 340 240 180 144 95 59 86 1,219
Wyoming - 45 61 27 15 7 10 2 5 172
U.S. Total 627 4,962 15,913 9,690 6,478 4,551 2,545 1,608 2,539 48,286
Puerto Rico 5 - 17 56 71 95 38 31 27 335
Grand Total 632 4,962 15,930 9,746 6,549 4,646 2,583 1,639 2,566 48,621

NATIONAL HIGHWAY SYSTEM LENGTH - 2005 - MILES BY MEASURED PAVEMENT ROUGHNESS

Footnotes

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/ Excludes 770 miles of Federal agency owned roads.

4/ 2004 data used.


This table is also available for download in the following formats:

To view PDF files, you need the Acrobat® Reader®.

OHPI Home | Highway Statistics 2005 | Data Feedback


FHWA Home | Feedback
FHWA