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Highway Statistics 2009

National Highway System Length - 2009 Miles by Measured Pavement Roughness - Rural

March 2012
Sheet 1 OF 4
Table HM-47

Excel Version (71 kb)
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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 3/ 2 403 92 19 11 - 12 - - 537 19 892 1,011 92 18 1 - - - 2,014
Alaska - 39 352 323 206 25 59 - - 1,004 249 18 150 74 149 105 72 69 106 742
Arizona 3/ - 561 376 37 5 3 - - - 982 5 509 347 121 92 32 7 1 1 1,110
Arkansas 3/ 1 256 131 25 12 9 10 2 2 447 9 146 881 468 205 76 25 10 12 1,823
California - 213 491 266 142 77 36 29 27 1,282 - 191 1,705 779 462 139 74 16 4 3,369
Colorado 3/ - 81 274 160 106 43 18 - - 682 - 142 935 476 165 67 47 14 13 1,859
Connecticut - 5 34 3 0 1 - - - 43 - 4 55 52 24 18 4 0 0 158
Delaware - - - - - - - - - - - 22 114 27 3 3 1 - 0 170
Dist. of Columbia - - - - - - - - - - - - - - - - - - - -
Florida 3/ - 498 251 - - - - - - 749 - 560 822 95 13 17 - 4 - 1,511
Georgia 20 416 216 60 2 - - 1 - 695 8 1,978 1,127 38 8 4 - 2 1 3,158
Hawaii - - - - 6 - - - - 6 - 1 13 15 42 18 6 9 3 105
Idaho - 141 310 39 18 7 - 6 1 522 - 237 1,030 254 73 24 27 2 2 1,651
Illinois - 471 619 206 53 7 - - 0 1,356 - 123 692 543 174 78 30 11 9 1,660
Indiana - 87 418 156 36 6 - - - 704 - 288 637 167 94 21 5 4 3 1,220
Iowa 0 146 259 129 56 25 6 4 3 628 11 266 687 479 306 160 72 41 29 2,040
Kansas 3/ 10 110 439 81 16 - - - - 646 37 224 1,709 513 78 11 5 1 1 2,542
Kentucky - 338 188 13 13 - - - - 553 0 645 896 103 77 9 4 1 - 1,735
Louisiana - 100 192 101 66 73 1 1 - 534 - 52 484 240 94 78 59 38 8 1,052
Maine - 96 143 44 13 3 0 - - 299 - 116 345 128 82 47 24 26 26 794
Maryland - 71 105 12 1 0 0 - 0 189 - 171 225 35 18 13 5 6 1 474
Massachusetts - 20 62 5 4 - - - - 91 - 10 44 68 30 5 9 0 - 166
Michigan - 187 245 72 33 50 6 10 4 607 - 864 928 166 117 44 13 7 5 2,144
Minnesota 3/ 4 100 279 89 88 51 1 17 5 630 23 455 1,058 512 260 123 85 5 5 2,503
Mississippi - 125 282 37 32 8 2 2 - 488 - 285 866 226 184 62 26 38 7 1,694
Missouri - 332 382 3 2 4 - - - 722 - 536 1,245 368 192 62 14 2 3 2,423
Montana - 365 695 19 31 7 8 4 0 1,130 - 471 1,528 370 166 74 5 2 1 2,616
Nebraska - 204 187 30 - - - - - 420 - 474 1,004 406 187 126 52 40 19 2,308
Nevada - 350 60 18 21 3 0 0 - 451 - 1,004 407 3 1 0 2 1 1 1,419
New Hampshire 3/ - 69 54 23 4 - - - - 150 - 76 193 67 32 19 14 4 2 407
New Jersey - 12 30 14 8 1 - 0 - 65 - 9 66 73 62 27 11 9 2 259
New Mexico - 499 285 55 4 3 - - - 844 - 921 469 197 98 21 3 1 1 1,709
New York 0 127 502 90 43 29 29 18 5 842 24 105 843 342 114 53 9 8 12 1,485
North Carolina 3/ - 115 284 60 36 38 8 1 - 542 - 249 1,105 433 113 36 13 4 2 1,955
North Dakota - 234 256 29 - - - - - 519 - 554 962 259 205 86 17 4 2 2,088
Ohio 3/ - 260 375 63 11 11 1 2 1 724 3 268 895 259 141 64 14 5 7 1,653
Oklahoma 3/ - 154 358 99 38 17 12 6 - 684 - 248 909 491 185 111 68 50 36 2,098
Oregon - 25 348 162 19 - - - - 554 - 356 1,375 493 264 105 15 7 5 2,619
Pennsylvania 3/ 1 461 428 154 36 13 2 1 1 1,096 3 238 824 385 200 96 27 11 7 1,788
Rhode Island - 1 21 0 - - - - - 21 - - 2 7 11 9 7 7 5 47
South Carolina - 184 279 73 13 20 9 0 3 581 - 35 643 273 127 30 3 1 2 1,113
South Dakota 3/ - 72 340 144 40 5 - - - 601 2 436 1,034 321 192 79 42 41 39 2,184
Tennessee - 604 61 9 7 0 - 4 2 687 - 608 713 150 52 18 3 2 4 1,548
Texas 3/ - 501 1,307 191 39 19 1 - - 2,058 18 612 3,264 1,604 584 68 14 19 2 6,167
Utah - 166 391 98 63 5 1 - - 725 - 36 417 256 148 69 38 3 3 971
Vermont - 102 139 24 8 3 0 0 4 280 - 15 209 37 25 20 4 6 5 320
Virginia - 89 522 37 17 2 0 - 0 667 0 36 822 291 97 27 16 3 1 1,293
Washington - 97 205 54 76 35 - - - 467 - 250 1,236 340 122 42 25 9 1 2,025
West Virginia - 49 255 33 18 6 7 - 2 371 - 46 540 236 134 49 22 6 13 1,046
Wisconsin 3/ - 113 193 101 41 14 7 9 - 478 - 662 875 499 269 96 31 21 8 2,461
Wyoming - 185 471 125 32 1 1 0 - 816 5 151 983 569 175 36 34 1 6 1,956
U.S. Total 39 9,832 14,188 3,585 1,526 623 238 117 60 30,170 416 16,593 39,323 14,399 6,666 2,577 1,100 571 423 81,653
Puerto Rico - - 1 10 4 11 5 4 7 42 - - 1 3 13 2 - - - 19
Grand Total 39 9,832 14,189 3,595 1,530 634 243 121 67 30,211 416 16,593 39,324 14,402 6,679 2,580 1,100 571 423 81,672

National Highway System Length - 2009 Miles by Measured Pavement Roughness - Rural

March 2012
Sheet 2 OF 4
Table HM-47

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 3/ 21 1,296 1,102 111 29 1 13 - - 2,552
Alaska 249 57 501 397 355 130 131 69 106 1,747
Arizona 3/ 5 1,070 723 158 96 35 7 1 1 2,091
Arkansas 3/ 11 401 1,013 493 217 86 35 12 13 2,270
California - 404 2,196 1,045 604 216 110 45 31 4,650
Colorado 3/ - 223 1,209 637 270 110 64 14 13 2,540
Connecticut - 10 89 55 24 19 4 0 0 201
Delaware - 22 114 27 3 3 1 - 0 170
Dist. of Columbia - - - - - - - - - -
Florida 3/ - 1,058 1,072 95 13 17 - 4 - 2,259
Georgia 28 2,394 1,343 98 10 4 - 3 1 3,852
Hawaii - 1 13 15 48 18 6 9 3 112
Idaho - 378 1,341 294 91 31 27 8 3 2,172
Illinois - 594 1,311 749 227 85 30 11 9 3,016
Indiana - 375 1,055 323 131 27 5 4 3 1,923
Iowa 11 412 946 608 362 184 78 45 33 2,668
Kansas 3/ 47 334 2,148 594 94 11 5 1 1 3,188
Kentucky 0 983 1,084 117 90 9 4 1 - 2,288
Louisiana - 152 676 340 160 151 59 39 8 1,586
Maine - 212 488 172 95 50 24 26 26 1,093
Maryland - 242 330 47 19 13 6 6 1 663
Massachusetts - 30 106 73 34 5 9 0 - 258
Michigan - 1,051 1,173 238 150 94 19 16 9 2,751
Minnesota 3/ 26 555 1,337 601 347 174 86 22 10 3,132
Mississippi - 410 1,148 263 216 70 28 40 7 2,182
Missouri - 868 1,627 371 195 65 14 2 3 3,145
Montana - 835 2,223 389 197 81 14 6 1 3,745
Nebraska - 677 1,191 436 187 126 52 40 19 2,728
Nevada - 1,354 467 21 22 3 2 1 1 1,870
New Hampshire 3/ - 145 247 90 36 19 14 4 2 557
New Jersey - 21 96 87 70 28 11 9 2 324
New Mexico - 1,419 753 251 102 24 3 1 1 2,554
New York 25 231 1,345 432 157 82 38 26 16 2,327
North Carolina 3/ - 364 1,389 493 149 75 21 4 2 2,497
North Dakota - 788 1,218 288 205 86 17 4 2 2,607
Ohio 3/ 3 528 1,270 322 152 76 14 7 7 2,376
Oklahoma 3/ - 402 1,267 590 224 128 80 56 36 2,783
Oregon - 381 1,723 655 283 105 15 7 5 3,173
Pennsylvania 3/ 4 699 1,253 539 236 109 29 12 7 2,884
Rhode Island - 1 22 7 11 9 7 7 5 69
South Carolina - 219 921 346 140 50 13 2 4 1,694
South Dakota 3/ 2 508 1,375 465 233 84 42 41 39 2,787
Tennessee - 1,212 774 159 59 18 3 6 6 2,236
Texas 3/ 18 1,113 4,571 1,795 623 87 15 19 2 8,225
Utah - 202 809 353 211 74 40 3 3 1,696
Vermont - 117 348 61 32 23 4 6 9 600
Virginia 0 125 1,344 329 113 29 16 3 2 1,960
Washington - 347 1,442 395 197 77 25 9 1 2,492
West Virginia - 95 795 269 152 56 29 6 15 1,417
Wisconsin 3/ - 775 1,068 600 310 109 37 30 8 2,937
Wyoming 5 336 1,455 695 207 37 36 1 6 2,773
U.S. Total 455 26,425 53,512 17,985 8,191 3,202 1,337 687 481 111,819
Puerto Rico - - 3 13 17 13 5 4 7 61
Grand Total 455 26,425 53,515 17,998 8,208 3,215 1,342 691 488 111,880

National Highway System Length - 2009 Miles by Measured Pavement Roughness - Urban

March 2012
Sheet 3 OF 4
Table HM-47

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE SYSTEM OTHER
NOT REPORTED 1/ < 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/ 15 185 110 21 12 16 4 1 1 350 37 314 317 47 18 8 2 - 3 709
Alaska - 11 40 22 3 1 0 - 1 78 - 2 12 17 17 18 2 5 2 76
Arizona 3/ - 84 83 17 4 - - - - 188 18 150 126 53 74 36 18 7 6 470
Arkansas 3/ - 42 84 35 18 18 5 1 3 206 5 13 76 54 30 37 20 14 17 261
California - 36 344 277 192 138 69 78 44 1,178 - 28 507 422 301 234 96 67 87 1,741
Colorado 3/ - 36 108 64 27 18 15 1 2 271 - 24 232 156 166 75 41 24 36 754
Connecticut - 35 146 65 32 13 6 3 4 303 - 18 123 135 85 44 21 16 17 459
Delaware - 2 20 10 3 3 3 1 0 41 - 17 72 20 9 5 1 1 2 127
Dist. of Columbia - - - - 5 1 2 2 3 13 - - - - 5 2 3 9 51 70
Florida 3/ 3 376 330 7 4 2 - - - 719 18 368 755 128 58 22 10 14 10 1,365
Georgia 12 332 133 45 5 - - - - 516 21 449 531 80 24 15 5 1 3 1,108
Hawaii - - 12 3 11 9 8 3 2 49 - 16 40 30 33 35 26 8 9 196
Idaho - 25 48 9 1 1 - 3 3 90 1 9 38 25 11 9 1 1 5 99
Illinois - 110 304 206 116 41 26 19 3 826 - 43 240 485 304 241 165 112 305 1,895
Indiana - 27 232 126 46 19 4 8 5 467 - 34 189 95 88 52 25 16 21 519
Iowa 1 26 64 28 16 8 5 3 2 152 25 16 95 97 53 37 26 19 38 382
Kansas 3/ 20 9 89 51 47 2 - - - 198 8 21 148 106 21 10 5 2 6 319
Kentucky - 55 79 43 19 13 1 - - 209 1 56 152 108 27 24 10 3 9 389
Louisiana - 21 113 73 50 67 37 4 6 371 2 3 139 129 95 68 101 64 77 676
Maine - 12 35 13 6 2 0 0 - 68 - 10 30 29 23 13 9 8 7 131
Maryland - 68 150 41 18 8 9 5 9 308 0 82 195 85 46 45 19 16 60 547
Massachusetts 5 191 238 34 8 4 2 - - 476 1 67 228 163 164 204 161 117 125 1,230
Michigan - 94 283 141 50 43 11 7 6 635 0 101 302 284 186 122 115 95 172 1,376
Minnesota 3/ - 10 116 62 60 32 1 - 3 284 47 34 221 106 63 52 16 5 6 503
Mississippi - 27 106 37 27 9 5 0 1 211 - 38 182 100 51 35 19 18 16 459
Missouri - 100 277 51 19 5 3 3 1 458 5 96 399 172 82 30 20 7 8 813
Montana - 18 39 0 - 1 2 2 - 62 - 4 22 13 13 7 2 2 3 67
Nebraska - 4 40 9 5 2 2 0 - 61 1 12 27 20 42 61 33 43 39 276
Nevada - 44 43 15 14 3 1 0 0 120 1 65 49 17 7 2 7 1 5 152
New Hampshire 3/ - 33 38 2 - 1 1 - 1 76 6 43 78 17 7 9 2 2 3 161
New Jersey - 57 102 87 30 28 31 13 19 366 13 45 229 283 276 190 121 78 154 1,376
New Mexico - 42 86 17 8 3 0 0 - 156 0 26 105 26 34 15 6 4 8 224
New York 9 72 399 134 73 64 38 28 46 854 73 31 431 465 328 196 122 70 270 1,912
North Carolina 3/ - 96 274 99 75 27 10 1 1 583 - 66 445 169 85 32 11 7 12 827
North Dakota - 9 34 7 1 - - - - 52 - 4 13 14 23 4 2 4 4 69
Ohio 3/ - 182 437 121 73 22 9 3 2 849 8 86 504 255 150 95 55 34 44 1,223
Oklahoma 3/ - 35 86 51 28 15 11 8 14 248 - 27 145 68 38 28 25 14 21 366
Oregon - 3 92 58 16 5 1 - 1 175 - 23 115 110 61 38 22 18 16 403
Pennsylvania 3/ 13 154 316 131 50 21 7 2 1 682 34 158 534 453 333 212 104 61 54 1,909
Rhode Island - 9 25 14 1 0 0 - - 50 - - 35 43 27 18 12 8 14 156
South Carolina - 75 117 43 18 5 2 1 0 262 - 10 208 222 119 60 22 15 17 673
South Dakota 3/ - 9 29 25 6 2 5 - - 76 2 1 14 12 14 14 13 1 3 72
Tennessee - 236 116 34 12 9 3 3 3 417 - 210 296 109 64 37 19 12 28 775
Texas 3/ 3 68 542 304 164 75 15 3 - 1,171 117 104 1,056 1,035 744 416 194 158 223 3,930
Utah - 53 94 35 25 4 0 0 - 211 - 28 111 55 29 16 7 5 5 255
Vermont - 19 20 1 0 - - - - 40 - 0 17 9 3 6 5 4 8 52
Virginia - 21 203 102 70 43 8 3 2 452 30 20 353 273 133 105 61 37 39 1,020
Washington - 37 157 59 19 19 5 2 0 297 - 24 263 124 59 47 21 23 64 624
West Virginia - 25 117 19 8 7 6 1 0 184 - 13 98 48 28 13 12 7 5 224
Wisconsin 3/ 1 40 100 66 30 9 14 3 3 265 5 38 196 236 156 125 79 79 80 989
Wyoming - 8 37 27 13 4 6 0 1 97 0 4 37 19 11 4 2 1 4 81
U.S. Total 82 3,261 7,087 2,942 1,536 842 391 218 194 16,471 480 3,051 10,729 7,223 4,818 3,223 1,895 1,334 2,219 34,492
Puerto Rico 2 - 30 74 47 44 28 8 6 238 2 - 2 7 11 33 21 11 25 109
Grand Total 84 3,261 7,117 3,016 1,583 886 420 225 200 16,709 482 3,051 10,731 7,230 4,829 3,256 1,916 1,345 2,244 34,601

National Highway System Length - 2009 Miles by Measured Pavement Roughness - Urban

March 2012
Sheet 4 OF 4
Table HM-47

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 3/ 52 498 428 69 30 25 7 1 4 1,062
Alaska - 13 52 39 20 19 3 5 3 154
Arizona 3/ 18 234 209 70 78 36 18 7 6 658
Arkansas 3/ 5 55 161 89 48 55 25 15 19 467
California - 64 851 699 493 372 165 145 130 2,919
Colorado 3/ - 60 340 219 193 93 55 25 38 1,023
Connecticut - 53 269 199 117 57 27 19 21 762
Delaware - 19 92 29 12 8 4 1 3 168
Dist. of Columbia - - - - 10 3 5 11 54 82
Florida 3/ 21 744 1,085 135 62 24 10 14 10 2,084
Georgia 33 781 664 125 29 15 5 1 3 1,623
Hawaii - 16 51 33 44 44 34 11 11 245
Idaho 1 34 86 34 12 10 1 4 8 189
Illinois - 153 544 691 420 282 191 131 308 2,721
Indiana - 61 421 221 133 72 28 24 27 986
Iowa 26 41 159 126 70 44 31 22 40 533
Kansas 3/ 28 30 236 157 67 12 6 2 7 517
Kentucky 1 111 231 151 46 37 11 3 9 598
Louisiana 2 24 253 202 145 136 138 68 83 1,048
Maine - 22 65 42 29 15 10 8 7 199
Maryland 0 150 344 126 64 53 28 21 68 855
Massachusetts 6 258 467 197 172 208 163 117 125 1,707
Michigan 0 194 585 426 235 165 126 101 178 2,011
Minnesota 3/ 47 43 337 168 123 84 17 5 9 786
Mississippi - 65 288 137 77 45 24 18 17 670
Missouri 5 196 676 223 101 34 23 10 9 1,272
Montana - 22 61 14 13 8 4 4 3 129
Nebraska 1 16 66 28 46 64 35 44 39 338
Nevada 1 109 92 32 21 4 8 1 5 272
New Hampshire 3/ 6 76 116 19 7 10 3 2 3 236
New Jersey 13 102 331 370 306 218 151 91 173 1,743
New Mexico 0 68 192 43 41 18 6 4 8 379
New York 82 103 830 599 401 260 160 98 315 2,766
North Carolina 3/ - 162 719 268 159 59 22 7 13 1,409
North Dakota - 14 47 22 24 4 2 4 4 120
Ohio 3/ 8 268 941 376 223 117 64 36 46 2,071
Oklahoma 3/ - 63 231 120 66 43 37 22 35 617
Oregon - 26 207 168 77 42 23 18 17 578
Pennsylvania 3/ 47 312 850 584 383 233 112 62 55 2,591
Rhode Island - 9 60 57 28 18 12 8 14 205
South Carolina - 85 325 266 137 65 24 16 17 935
South Dakota 3/ 2 10 43 38 20 17 18 2 3 151
Tennessee - 446 412 143 75 46 23 15 31 1,192
Texas 3/ 119 173 1,599 1,339 908 492 209 161 224 5,105
Utah - 81 204 90 54 20 7 5 5 467
Vermont - 19 37 11 3 6 5 4 8 93
Virginia 30 40 556 375 202 148 68 40 41 1,472
Washington - 61 420 183 78 65 25 25 65 921
West Virginia - 37 216 68 36 20 18 8 6 408
Wisconsin 3/ 6 77 296 302 186 133 93 83 83 1,253
Wyoming 0 12 74 46 24 8 8 1 5 178
U.S. Total 561 6,311 17,818 10,167 6,352 4,067 2,290 1,551 2,413 50,969
Puerto Rico 4 - 32 82 58 77 49 19 31 347
Grand Total 565 6,311 17,850 10,248 6,410 4,144 2,339 1,570 2,444 51,317

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/ 2008 data used due to FHWA process status.

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Page last modified on November 7, 2014.
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