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Highway Statistics 2008

Functional System Length - 2008 Miles By Measured Pavement Roughness - Rural

October 2008
Table HM-64
Sheet 1 of 4

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STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE
NOT REPORTED 2/ < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 2 403 92 19 11 - 12 - - 537
Alaska - 25 207 387 262 24 83 23 3 1,014
Arizona - 561 376 37 5 3 - - - 982
Arkansas 1 256 131 25 12 9 10 2 2 447
California - 93 533 193 169 84 68 75 66 1,281
Colorado - 81 274 160 106 43 18 - - 682
Connecticut - 1 38 3 - 1 - - - 43
Delaware - - - - - - - - - -
Dist. of Columbia - - - - - - - - - -
Florida - 498 251 - - - - - - 749
Georgia 34 367 241 71 2 - - - - 681
Hawaii - - - - 6 - - - - 6
Idaho - 74 353 46 36 6 5 2 - 522
Illinois - 467 633 190 56 10 - - - 1,356
Indiana 4/ - 69 436 166 30 6 - - - 707
Iowa - 111 272 150 56 25 6 4 4 628
Kansas 10 110 439 81 16 - - - - 646
Kentucky - 221 270 28 27 8 - - - 554
Louisiana 59 100 198 83 48 41 - 1 6 477
Maine - 70 165 46 17 - - - - 298
Maryland 1 67 104 10 1 - - - - 182
Massachusetts - 17 62 12 - - - - - 91
Michigan - 168 265 54 55 48 4 13 1 608
Minnesota 4 100 279 89 88 51 1 17 5 630
Mississippi - 58 330 36 42 17 4 2 1 490
Missouri - 325 388 3 2 4 - - - 722
Montana - 455 584 27 40 20 4 - - 1,130
Nebraska - 208 171 31 11 - - - - 421
Nevada - 384 23 20 12 4 - - - 443
New Hampshire - 69 54 23 4 - - - - 150
New Jersey - 7 23 14 12 5 1 3 - 65
New Mexico - 499 285 55 4 3 - - - 846
New York 2 126 502 90 42 28 29 18 4 839
North Carolina - 115 284 60 36 38 8 1 - 542
North Dakota - 201 266 37 14 - - - - 518
Ohio - 260 375 63 11 11 1 2 1 724
Oklahoma - 154 358 99 38 17 12 6 - 684
Oregon - 29 340 169 14 2 - - - 554
Pennsylvania 1 461 428 154 36 13 2 1 1 1,096
Rhode Island - 1 21 - - - - - - 22
South Carolina - 207 220 85 37 31 1 - - 581
South Dakota - 72 340 144 40 5 - - - 601
Tennessee - 560 115 8 2 1 - 1 - 687
Texas - 501 1,307 191 39 19 1 - - 2,058
Utah 3 173 376 111 26 28 - 6 1 721
Vermont - 140 120 12 2 1 - 4 - 279
Virginia - 89 524 37 16 2 - - - 668
Washington - 145 154 47 60 50 10 - - 466
West Virginia - 42 226 43 27 11 - 1 5 355
Wisconsin - 113 193 101 41 14 7 9 - 478
Wyoming - 185 471 125 32 1 1 - - 815
U.S. Total 117 9,438 14,097 3,635 1,643 684 288 191 100 30,076
Puerto Rico - - 1 9 8 8 2 1 3 32
Grand Total 117 9,438 14,098 3,644 1,651 692 290 192 103 30,108

October 2008
Table HM-64
Sheet 2 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
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
Alabama 21 920 1,093 93 19 2 1 - - 2,128 - 948 2,154 452 256 - - - - 3,810
Alaska 301 26 109 66 89 38 53 69 53 503 156 - 55 15 44 78 97 - - 289
Arizona 1 526 370 120 93 37 13 2 5 1,166 30 388 589 222 55 74 - - - 1,328
Arkansas 7 152 989 638 289 99 29 15 17 2,228 - 2 1,066 968 625 263 126 - 8 3,058
California 8 151 1,707 808 466 164 103 51 39 3,489 73 66 1,236 2,070 1,608 767 403 142 254 6,546
Colorado - 235 1,110 563 222 85 50 29 23 2,317 181 83 1,127 1,005 775 406 177 - - 3,573
Connecticut - 4 51 57 37 12 2 1 1 165 - - 20 97 68 58 4 - - 247
Delaware - 2 99 61 1 2 - - - 165 - - 72 34 2 2 - - - 110
Dist. of Columbia - - - - - - - - - - - - - - - - - - - -
Florida 1 931 1,614 193 68 33 12 5 - 2,856 - 747 1,503 81 37 32 - - - 2,400
Georgia 15 1,674 904 36 5 5 - 2 - 2,626 - 2,939 2,207 40 - - - - - 5,186
Hawaii - - 15 22 29 33 3 6 3 111 - - 6 88 47 109 14 3 30 297
Idaho 20 90 1,091 353 93 51 27 3 2 1,710 19 71 832 256 199 15 32 1 1 1,407
Illinois - 154 921 615 312 200 99 30 23 2,354 - 212 1,976 1,046 341 379 258 475 - 4,687
Indiana 4/ - 417 764 241 100 45 10 14 - 1,591 - 422 870 461 204 80 20 1 - 2,058
Iowa 17 410 1,066 738 519 350 217 103 58 3,461 4 893 1,152 518 433 561 156 19 177 3,909
Kansas 37 300 2,029 583 96 12 7 1 1 3,029 - 301 2,880 812 249 18 8 3 6 4,277
Kentucky - 622 1,180 351 170 27 3 1 4 2,358 - - 754 725 185 37 2 - 1 1,704
Louisiana 12 46 474 223 84 73 37 36 8 981 - 34 797 347 113 27 119 82 70 1,589
Maine - 88 369 144 65 44 35 24 18 787 - 62 491 172 135 65 49 7 36 1,017
Maryland 9 153 216 34 22 5 1 1 2 434 - 42 546 184 26 4 19 - - 821
Massachusetts - 9 40 72 34 6 5 - 1 167 - 3 99 87 167 19 11 5 2 393
Michigan - 952 1,130 277 123 53 29 6 4 2,574 - 1,596 2,039 601 237 184 130 - 219 5,006
Minnesota 30 614 1,503 747 423 172 103 7 5 3,574 - 1,662 2,013 1,091 997 309 265 166 135 6,638
Mississippi - 157 1,004 338 223 77 37 29 7 1,872 - 81 1,090 797 561 338 464 212 140 3,683
Missouri 1 543 1,450 632 331 145 27 5 2 3,135 - 45 743 2,143 646 217 176 - - 3,970
Montana - 573 1,487 366 130 53 10 1 - 2,620 1 335 1,888 471 184 102 - - - 2,980
Nebraska - 595 1,186 426 266 132 42 30 17 2,694 - 993 1,540 938 255 298 75 66 5 4,170
Nevada - 1,005 377 10 12 2 - - 4 1,410 2 358 278 22 75 - - 2 - 735
New Hampshire 1 71 175 55 23 16 13 3 1 357 - 67 191 64 46 25 29 7 37 466
New Jersey - 4 65 45 91 31 12 4 2 254 - 14 32 108 64 60 12 8 14 312
New Mexico 11 955 523 216 105 23 5 2 2 1,831 116 420 615 415 184 41 54 59 42 1,830
New York 42 111 833 364 114 50 11 4 10 1,497 - 47 1,966 645 841 222 - 25 - 3,746
North Carolina - 259 1,143 383 95 47 11 3 8 1,949 - 36 1,284 823 334 100 19 - 2 2,598
North Dakota - 714 1,320 398 260 132 93 3 11 2,931 - 251 1,071 481 408 199 73 - 33 2,516
Ohio 4 296 1,046 322 184 79 22 7 8 1,964 - 118 1,651 300 247 120 174 43 4 2,657
Oklahoma - 251 959 603 235 114 69 50 36 2,317 - 162 1,100 847 242 150 42 141 - 2,684
Oregon - 238 1,558 615 254 88 21 5 5 2,784 - 249 986 639 339 90 18 31 9 2,361
Pennsylvania 3 252 873 425 217 107 31 12 12 1,929 - 107 1,497 1,172 655 694 184 130 106 4,545
Rhode Island - - 2 7 11 9 7 8 5 49 - - 3 11 23 12 11 2 3 65
South Carolina - 58 741 291 138 45 4 2 2 1,281 - - 2,063 645 402 141 12 16 10 3,289
South Dakota - 557 1,235 325 213 82 40 41 41 2,534 - 519 880 401 317 492 499 102 130 3,340
Tennessee - 733 934 142 35 10 3 3 6 1,866 - 988 1,534 461 56 133 14 - 14 3,200
Texas 19 747 3,825 1,989 723 101 38 24 12 7,459 25 468 4,027 3,769 1,179 486 36 7 11 9,983
Utah 12 33 381 252 177 65 45 17 6 976 9 104 418 349 219 340 46 - 5 1,481
Vermont - 9 178 65 32 18 8 6 3 319 - - 46 127 122 86 147 44 155 727
Virginia 1 38 915 327 72 10 5 3 1 1,371 - 53 1,366 1,671 315 26 3 8 - 3,442
Washington - 223 1,222 345 118 39 22 10 2 1,981 - 171 692 381 488 101 24 3 - 1,860
West Virginia - 50 453 271 165 70 20 12 11 1,052 - 30 543 252 375 116 7 - 18 1,341
Wisconsin 1 881 1,126 594 359 135 46 25 11 3,177 - 1,344 1,822 747 518 268 37 67 30 4,833
Wyoming 5 151 989 579 182 42 34 1 6 1,984 - 118 425 359 154 90 71 5 - 1,222
U.S. Total 579 17,980 44,844 17,420 8,124 3,270 1,515 716 498 94,367 616 17,549 54,235 30,410 16,052 8,434 4,117 1,882 1,707 134,386
Puerto Rico - - 1 6 22 4 11 - 8 52 27 - - 1 6 18 24 40 117 206
Grand Total 579 17,980 44,845 17,426 8,146 3,274 1,526 716 506 94,419 643 17,549 54,235 30,411 16,058 8,452 4,141 1,922 1,824 134,592

October 2008
Table HM-64
Sheet 3 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE
NOT REPORTED 2/ < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama 15 185 110 21 12 16 4 1 1 350
Alaska - 18 33 10 6 1 - 1 - 69
Arizona - 84 83 17 4 - - - - 188
Arkansas - 42 84 35 18 18 5 1 3 206
California 2 24 284 212 224 142 98 95 98 1,177
Colorado - 36 108 64 27 18 15 1 2 271
Connecticut - 31 151 64 33 11 5 5 2 302
Delaware 1 - 26 7 2 3 1 1 - 40
Dist. of Columbia - - - - 5 2 - 2 3 12
Florida 3 376 330 7 4 2 - - - 719
Georgia 12 336 131 43 5 - - - - 515
Hawaii - - 10 6 8 12 4 3 5 48
Idaho - 20 53 9 - - - 5 2 89
Illinois - 107 315 201 113 41 26 19 3 825
Indiana 4/ - 28 228 115 48 32 5 4 4 464
Iowa 1 15 65 32 16 11 7 4 2 152
Kansas 20 9 89 51 47 2 - - - 198
Kentucky - 47 81 36 29 15 1 - - 209
Louisiana 53 21 103 59 50 52 22 6 5 318
Maine - 10 37 14 6 - - - - 67
Maryland 10 60 144 39 15 9 9 3 8 287
Massachusetts 5 129 292 45 4 6 - - - 476
Michigan 1 73 271 149 59 38 17 18 9 634
Minnesota - 10 116 62 60 32 1 - 3 284
Mississippi - 23 104 40 21 13 5 1 1 208
Missouri - 108 269 44 26 7 2 3 1 460
Montana - 16 35 3 4 1 2 - - 61
Nebraska - 6 39 8 3 5 - - - 61
Nevada 1 58 33 17 8 8 1 1 - 126
New Hampshire - 33 38 2 - 1 1 - 1 76
New Jersey 5 33 102 90 47 25 34 16 14 361
New Mexico - 42 86 17 8 3 - - - 156
New York 37 72 398 132 71 60 36 26 31 826
North Carolina - 96 274 99 75 27 10 1 1 583
North Dakota - 9 37 5 1 - - - - 52
Ohio - 182 437 121 73 22 9 3 2 849
Oklahoma - 35 86 51 28 15 11 8 14 248
Oregon 2 4 97 50 15 5 1 1 - 173
Pennsylvania 13 154 316 131 50 21 7 2 1 682
Rhode Island - 9 25 14 1 - - - - 49
South Carolina - 84 116 36 21 3 1 - 1 262
South Dakota - 9 29 25 6 2 5 - - 76
Tennessee 1 208 145 34 15 8 2 2 2 416
Texas 3 68 542 304 164 75 15 3 - 1,171
Utah - 64 78 27 26 13 4 - - 212
Vermont - 17 15 1 - - 7 - - 40
Virginia 7 20 195 104 68 43 8 4 2 444
Washington - 56 142 44 29 18 5 2 1 297
West Virginia - 28 97 38 12 17 5 1 - 198
Wisconsin 1 40 100 66 30 9 14 3 3 265
Wyoming - 8 37 27 13 4 6 - 1 96
U.S. Total 193 3,143 7,016 2,828 1,610 868 411 246 226 16,348
Puerto Rico 1 - 30 53 57 53 22 9 9 233
Grand Total 194 3,143 7,046 2,881 1,667 921 433 255 235 16,581

October 2008
Table HM-64
Sheet 4 of 4

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
OTHER FREEWAYS AND 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 3 20 16 3 - - - - - 39 57 331 504 93 49 17 5 1 3 1,003
Alaska - - - - - - - - - - - - 10 16 15 8 7 2 3 61
Arizona 1 115 45 4 7 4 1 - - 176 382 68 166 187 223 157 105 55 56 1,017
Arkansas 1 9 32 14 6 16 8 8 6 99 13 12 109 162 116 86 50 33 37 605
California 8 21 379 338 384 184 136 38 48 1,528 154 27 282 582 941 1,199 1,044 905 1,353 6,333
Colorado - 15 136 76 51 23 7 4 1 313 3 16 198 203 292 183 115 73 109 1,189
Connecticut - 12 96 79 25 16 4 2 3 237 - - 34 155 181 128 71 48 68 685
Delaware - 1 21 6 2 1 - - - 31 1 - 53 52 29 14 6 5 18 177
Dist. of Columbia - - - 3 4 5 - 5 3 20 - - - - - 2 10 10 79 101
Florida 9 155 392 14 5 5 4 - - 575 36 538 1,773 696 323 123 42 39 25 3,559
Georgia - 57 45 5 3 4 - - - 114 26 664 947 201 59 28 8 4 6 1,917
Hawaii - - 4 2 8 7 4 4 4 33 - 14 26 33 48 28 35 18 26 228
Idaho - - - - - - - - - - 71 10 89 93 53 38 32 10 18 343
Illinois - 16 17 14 18 26 6 1 2 100 - 53 483 613 587 442 296 221 409 3,104
Indiana 4/ - 25 55 29 32 8 4 4 5 162 2 151 493 313 309 235 145 105 122 1,873
Iowa - - - - - - - - - - 66 35 174 149 104 83 53 45 92 735
Kansas 6 17 81 62 13 3 4 - - 180 32 18 181 110 113 154 97 61 46 780
Kentucky - 10 47 - 6 4 - - - 67 - 57 243 215 109 86 36 22 24 792
Louisiana 5 - 13 6 7 2 14 - 2 44 23 5 171 165 166 109 132 111 186 1,045
Maine - 4 7 3 3 1 1 - 1 20 - 6 34 34 18 15 12 10 13 142
Maryland 8 42 143 59 22 10 3 3 4 286 6 47 242 178 123 121 81 53 227 1,072
Massachusetts 2 37 166 55 28 10 9 2 4 311 - 24 75 232 320 384 271 222 315 1,843
Michigan - 48 144 70 29 27 6 2 1 327 - 73 308 352 342 325 273 236 392 2,301
Minnesota 3 11 76 57 12 12 2 1 - 171 83 37 221 104 70 70 37 11 14 564
Mississippi - 9 32 11 5 2 6 - 1 66 - 30 236 232 153 109 114 47 112 1,033
Missouri 5 63 215 63 44 6 5 4 1 401 182 67 307 222 194 77 48 28 52 995
Montana - - - - - - - - - - 5 4 41 37 30 25 14 11 22 184
Nebraska - 6 - - 5 - 6 3 1 21 25 8 41 41 82 75 67 53 86 453
Nevada - 17 19 12 14 6 1 - - 69 20 82 94 41 28 10 7 3 10 275
New Hampshire - 33 21 1 - - - - - 55 16 18 96 28 19 17 8 5 10 201
New Jersey 1 16 158 114 60 20 20 7 7 402 90 1 79 207 282 288 192 177 389 1,615
New Mexico - - 5 - - - - - - 5 41 46 186 129 119 70 47 35 34 666
New York 22 16 179 222 132 97 59 24 38 767 112 30 436 498 387 250 157 134 859 2,751
North Carolina - 51 249 74 32 15 4 1 2 428 - 66 726 436 247 136 62 41 60 1,774
North Dakota - - - - - - - - - - - 5 22 34 39 23 13 12 22 170
Ohio 6 42 237 102 48 27 9 7 5 477 20 215 606 460 346 268 179 123 204 2,401
Oklahoma - 10 102 38 17 10 6 5 3 191 4 30 150 189 148 139 113 88 184 1,041
Oregon - 3 35 12 5 2 - - - 57 - 23 200 147 135 93 65 38 58 759
Pennsylvania 3 87 215 110 66 39 13 5 3 538 9 98 528 645 592 417 258 153 142 2,833
Rhode Island - - 35 38 10 5 - 1 - 89 - - 5 25 72 81 57 50 72 362
South Carolina - 6 54 8 7 7 1 - 1 84 - 15 258 355 198 115 43 31 42 1,057
South Dakota - - 5 4 1 2 - - - 12 22 1 11 16 21 21 25 11 14 120
Tennessee - 63 51 17 10 5 3 2 1 152 - 289 625 247 161 89 43 32 66 1,552
Texas 64 51 541 495 273 109 41 7 8 1,525 130 94 1,117 1,171 1,108 715 440 393 630 5,668
Utah - - 14 4 2 - - - - 20 - 43 171 67 43 23 12 3 4 366
Vermont - - 8 6 1 1 3 - - 19 - 1 20 14 14 13 11 9 21 103
Virginia 3 14 145 84 18 11 11 2 2 287 37 6 308 319 213 166 87 70 79 1,248
Washington 1 35 217 73 24 14 4 3 4 374 - 9 149 250 221 190 121 118 261 1,319
West Virginia - - 2 1 2 2 1 2 - 10 - 36 118 54 54 27 17 11 16 333
Wisconsin 1 19 83 102 46 25 10 5 - 290 294 61 263 300 274 251 173 151 163 1,636
Wyoming - - - 3 - - - - - 3 13 4 63 45 31 18 14 7 18 200
U.S. Total 152 1,156 4,537 2,493 1,487 773 416 152 161 11,175 1,975 3,468 13,672 11,147 9,801 7,741 5,350 4,134 7,271 62,584
Puerto Rico - - 1 15 10 18 13 3 6 66 15 - 3 28 59 69 85 56 76 376
Grand Total 152 1,156 4,538 2,508 1,497 791 429 155 167 11,241 1,990 3,468 13,675 11,175 9,860 7,810 5,435 4,190 7,347 62,960

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/ Estimated from sample data.

4/ Excludes 788 miles of Federal agency owned roads.

Updated: 01/03/2012

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United States Department of Transportation - Federal Highway Administration