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Highway Statistics Series

Highway Statistics 2011


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Functional System Length - 2011

March 2013
Table HM-64
1 of 4

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

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 0 329 130 28 23 10 6 5 6 537
Alaska 1 102 303 209 169 109 58 33 21 1,005
Arizona 18 451 376 86 26 14 5 1 3 962
Arkansas 0 203 138 45 22 13 7 7 6 441
California 166 207 391 213 138 66 36 23 38 1,112
Colorado - 104 288 170 50 50 16 4 1 685
Connecticut - 0 30 11 - 1 - - - 43
Delaware - - - - - - - - - -
Dist. of Columbia - - - - - - - - - -
Florida 3 459 251 23 8 3 1 0 0 745
Georgia 3 300 291 76 36 7 2 - 1 713
Hawaii - 0 2 2 1 1 0 0 0 6
Idaho - 434 68 14 4 2 0 0 - 522
Illinois - 538 587 138 20 72 - - 0 1,356
Indiana 93 291 182 56 34 24 10 9 13 619
Iowa 21 166 309 102 27 2 - - - 608
Kansas - 310 243 71 20 11 - - - 656
Kentucky 71 302 162 32 13 7 4 3 2 525
Louisiana - 133 156 134 62 48 0 1 - 533
Maine - 143 105 32 16 3 - 0 - 299
Maryland 1 78 83 11 5 3 1 1 1 183
Massachusetts 1 29 44 9 4 2 1 1 1 90
Michigan - 212 250 66 35 25 11 6 4 609
Minnesota - 133 289 107 52 26 11 8 3 630
Mississippi - 176 226 62 15 13 10 - - 502
Missouri 0 370 305 31 8 4 3 1 1 724
Montana - 328 597 113 56 20 6 3 5 1,129
Nebraska - 190 185 30 13 - - - - 418
Nevada 415 0 26 8 - - - - - 34
New Hampshire - 108 23 8 5 2 4 - - 149
New Jersey - 26 30 5 1 1 1 1 1 65
New Mexico - 437 348 36 15 11 0 1 - 848
New York - 226 475 71 35 17 6 9 9 847
North Carolina 19 275 176 36 18 9 4 2 2 522
North Dakota - 222 275 22 - - - - - 519
Ohio - 226 387 81 21 6 1 1 0 723
Oklahoma - 239 312 91 17 17 6 1 0 684
Oregon - 125 267 150 8 4 0 - - 553
Pennsylvania 14 412 492 137 53 9 1 1 2 1,106
Rhode Island - 13 9 - - - - - - 21
South Carolina - 185 320 59 15 2 - - 0 581
South Dakota 68 87 354 73 9 11 - 0 0 535
Tennessee 1 591 70 14 6 3 2 0 0 686
Texas 10 612 1,071 269 59 19 6 2 2 2,039
Utah - 222 344 93 40 20 4 - 1 724
Vermont 1 174 86 11 4 2 1 0 0 279
Virginia 0 142 424 58 29 4 0 - - 656
Washington - 142 182 67 29 15 13 11 8 467
West Virginia - 55 250 25 20 10 - 7 1 368
Wisconsin - 105 196 86 56 26 6 2 1 478
Wyoming 0 259 391 123 34 6 - - - 812
U.S. Total 907 10,871 12,498 3,399 1,329 728 244 143 137 29,349
Puerto Rico 4/ - - 1 10 4 11 5 4 7 42
Grand Total 907 10,871 12,499 3,409 1,333 739 249 147 144 29,391

March 2013
Table HM-64
2 of 4

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
OTHER FREEWAYS & EXPRESSWAYS 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 NOT REPORTED 2/ < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL REPORTED
Alabama - 45 19 5 3 1 0 - 0 74 6 1,049 813 140 60 26 12 5 6 2,110 14 1,024 1,996 647 194 76 28 21 6 3,991
Alaska - - - - - - - - - - 283 25 113 80 73 67 46 29 102 534 4 4 101 39 62 61 44 24 35 369
Arizona 21 3 2 - - - - - - 5 130 459 420 127 65 31 13 19 2 1,137 118 290 487 196 130 58 35 6 8 1,210
Arkansas 1 11 60 26 17 10 4 3 2 133 29 314 865 405 239 122 51 23 17 2,037 40 175 879 663 546 311 184 121 75 2,954
California - - - - - - - - - - 575 329 1,390 559 331 185 77 55 27 2,953 677 44 2,314 1,045 1,006 566 410 232 300 5,917
Colorado - 9 21 8 2 - - - - 41 - 318 1,042 536 241 103 35 23 12 2,311 230 92 1,035 853 690 461 248 91 21 3,491
Connecticut - 7 19 8 4 0 - 0 0 39 - - 40 42 20 16 2 5 1 127 - - 38 30 85 32 41 31 - 257
Delaware - - - - - - - - - - 3 15 101 32 6 1 1 0 1 158 - 2 87 13 9 3 1 - - 114
Dist. of Columbia - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Florida 1 88 80 6 2 1 1 0 0 179 157 1,019 1,172 193 72 32 13 6 10 2,517 16 705 1,457 171 39 3 7 2 6 2,392
Georgia - - - - - - - - - - 283 901 1,331 113 39 4 1 1 0 2,391 3,311 563 1,115 130 29 8 - - - 1,845
Hawaii - - - - - - - - - - 2 4 23 20 17 13 8 6 14 106 0 33 63 55 45 33 19 14 32 293
Idaho - - - - - - - - - - 14 1,037 555 87 28 11 5 3 2 1,728 207 726 356 70 21 8 4 1 0 1,186
Illinois - - - - - - - - - - 8 288 1,067 467 264 158 50 29 23 2,345 - 347 2,261 1,035 515 31 165 - 316 4,671
Indiana - - - - - - - - - - 1 640 634 164 60 30 17 13 29 1,587 - 711 871 204 129 49 33 16 32 2,044
Iowa - - - - - - - - - - 187 448 999 687 458 353 215 91 19 3,270 3,911 - - - - - - - - -
Kansas - - - - - - - - - - 37 871 1,695 349 85 29 7 3 - 3,039 - 506 2,573 894 242 39 17 10 - 4,281
Kentucky 23 314 171 37 22 12 5 2 2 564 128 504 750 281 118 46 19 9 10 1,737 232 107 646 425 239 114 49 17 20 1,616
Louisiana - - - - - - - - - - 2 36 538 206 112 65 28 26 5 1,017 - 115 820 436 187 62 58 28 44 1,751
Maine - - - - - - - - - - 0 43 379 209 74 58 17 7 1 788 - 40 302 233 169 156 52 6 59 1,017
Maryland - - - - - - - - - - 4 188 176 40 17 9 5 3 4 441 33 122 453 148 39 23 12 8 2 807
Massachusetts 3 9 7 1 0 0 0 - 0 17 20 9 32 39 28 11 4 1 2 126 96 24 59 35 70 47 26 7 11 277
Michigan - 213 95 36 16 11 3 2 1 376 - 1,042 753 195 95 51 23 14 23 2,196 150 1,675 1,700 545 394 153 110 38 248 4,861
Minnesota - 0 2 0 1 1 1 2 0 8 16 737 1,319 626 381 233 129 73 71 3,570 442 994 1,476 1,309 1,348 581 42 35 380 6,164
Mississippi - 1 - - - - - - - 1 59 349 1,081 224 107 69 13 22 2 1,866 147 428 1,270 930 753 131 10 - - 3,521
Missouri 0 429 466 49 15 4 2 1 1 967 2 657 931 310 147 67 26 11 8 2,157 15 243 1,154 1,115 687 477 173 77 53 3,979
Montana - - - - - - - - - - - 604 1,370 332 156 80 34 20 27 2,623 - 406 1,456 556 292 141 63 37 26 2,977
Nebraska - 25 197 91 20 6 2 8 1 351 1 807 815 344 169 113 50 48 15 2,361 - 952 1,322 678 598 356 110 128 9 4,153
Nevada 0 - - - - - - - - - 1,071 156 271 14 3 - - - - 444 365 115 201 68 - 11 - - - 394
New Hampshire - 18 4 - - - - - - 21 - 54 177 55 31 12 1 5 0 336 0 62 159 102 21 25 44 25 24 462
New Jersey - - - - - - - - - - 0 21 72 54 45 27 16 10 9 254 21 15 79 67 49 43 14 6 21 292
New Mexico - - - - - - - - - - 9 687 839 162 114 31 11 4 1 1,849 69 341 623 316 254 87 84 28 140 1,874
New York 1 15 65 27 13 4 2 0 1 128 1 99 751 336 135 50 17 10 10 1,409 - 18 1,791 945 397 344 204 6 40 3,746
North Carolina 0 1 1 0 0 0 0 - 0 3 59 355 951 275 119 53 24 13 16 1,805 291 87 1,029 546 307 151 77 50 116 2,363
North Dakota - - - - - - - - - - - 717 1,562 395 120 76 20 8 37 2,935 - 678 1,055 309 257 74 5 120 17 2,515
Ohio - - - - - - - - - - 3 383 1,012 370 131 44 20 5 5 1,970 - 182 1,306 711 342 52 32 21 11 2,657
Oklahoma - - - - - - - - - - - 284 981 539 279 112 59 46 28 2,328 - 252 998 572 575 219 34 52 - 2,703
Oregon - - - - - - - - - - 1 388 1,554 480 234 109 13 8 6 2,793 1,445 203 1,057 534 396 140 24 9 1 2,365
Pennsylvania 5 99 150 40 15 13 5 2 1 323 42 248 728 312 156 58 19 8 10 1,538 - 369 1,029 973 214 259 176 - 76 3,096
Rhode Island - - - - - - - - - - 0 - - 4 10 9 3 8 14 48 - - 4 8 16 12 6 6 15 66
South Carolina - - - - - - - - - - - 149 698 266 129 39 4 2 3 1,289 258 146 1,476 1,098 431 71 19 - 15 3,256
South Dakota - - - - - - - - - - 117 474 1,406 304 165 43 18 5 0 2,415 5 656 1,040 466 424 267 157 73 1 3,084
Tennessee - - - - - - - - - - 17 852 754 159 63 27 12 7 4 1,878 238 948 1,403 465 211 60 53 14 27 3,182
Texas - - - - - - - - - - 106 1,074 3,253 1,826 792 265 80 21 19 7,330 26 949 3,868 2,778 1,351 657 205 55 57 9,920
Utah - - - - - - - - - - - 43 439 308 130 68 28 11 4 1,032 0 73 389 293 185 297 148 17 1 1,404
Vermont - - - - - - - - - - 0 46 162 49 25 15 8 6 10 319 - 57 175 130 97 77 43 47 104 728
Virginia 2 - - - - - - - - - 3 128 901 266 91 9 10 1 0 1,406 3 145 1,569 1,513 152 7 15 4 3 3,408
Washington - 135 320 146 54 20 24 20 3 723 0 135 724 262 73 40 11 6 7 1,257 - 142 626 460 355 242 56 18 9 1,909
West Virginia - - - - - - - - - - 16 51 535 223 166 51 21 9 12 1,068 - - 550 219 158 196 74 99 10 1,305
Wisconsin - 34 74 37 48 21 - - - 214 1 563 1,059 640 372 179 87 29 32 2,961 59 899 1,738 648 466 606 228 145 89 4,819
Wyoming - - - - - - - - - - 58 151 1,025 523 158 55 7 3 12 1,934 - 99 377 304 305 52 57 - - 1,194
U.S. Total 57 1,459 1,751 518 232 106 48 40 12 4,167 3,450 19,751 40,258 14,629 7,004 3,355 1,391 770 672 87,830 12,422 16,086 48,294 26,730 15,579 8,105 3,932 1,679 2,458 122,863
Puerto Rico 4/ - - - - - - - - - - 1 - 1 3 23 6 2 - 7 42 13 - - - - 18 30 38 132 218
Grand Total 57 1,459 1,751 518 232 106 48 40 12 4,167 3,451 19,751 40,259 14,632 7,027 3,361 1,393 770 679 87,872 12,435 16,086 48,294 26,730 15,579 8,123 3,962 1,717 2,590 123,081

March 2013
Table HM-64
3 of 4

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

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 1 157 101 37 30 17 10 8 7 368
Alaska - 21 30 15 8 2 1 - 1 79
Arizona 72 51 48 10 3 1 1 1 1 116
Arkansas 0 52 64 32 23 18 11 8 6 214
California 198 57 312 198 132 103 74 51 50 976
Colorado - 40 121 52 36 11 7 1 - 268
Connecticut - 40 164 48 29 13 3 3 3 303
Delaware - 2 18 12 4 3 1 2 0 41
Dist. of Columbia 5 - - 1 1 1 1 2 2 8
Florida 29 321 294 54 25 12 6 3 3 718
Georgia 104 199 167 44 17 2 - - - 427
Hawaii 0 4 10 6 6 6 5 4 7 48
Idaho - 68 19 3 0 0 0 - - 90
Illinois - 136 289 101 47 236 7 - 9 826
Indiana 64 126 132 53 29 24 13 10 9 396
Iowa 5 13 73 27 19 12 3 3 - 149
Kansas - 49 72 52 35 9 1 - - 218
Kentucky 32 70 68 17 6 5 2 1 2 172
Louisiana - 34 88 107 46 59 22 8 2 365
Maine - 18 33 17 1 - 0 0 - 69
Maryland 2 96 117 28 16 11 9 6 12 295
Massachusetts 15 205 172 35 16 11 9 7 13 468
Michigan - 142 263 100 55 33 21 12 10 635
Minnesota 3 32 118 49 36 27 14 3 3 281
Mississippi - 33 100 40 17 11 1 - - 201
Missouri 0 207 196 37 17 11 5 5 6 482
Montana - 21 34 2 4 1 0 0 0 63
Nebraska - 6 31 15 8 3 0 - - 64
Nevada 100 7 12 1 - 0 - - - 21
New Hampshire - 41 31 4 0 - - - - 76
New Jersey 9 106 113 49 30 18 13 11 18 357
New Mexico - 62 64 13 10 2 - 1 0 152
New York 2 80 436 142 59 49 22 26 41 855
North Carolina 18 241 243 69 33 16 8 2 2 614
North Dakota - 18 33 1 - - - - - 52
Ohio - 178 426 141 59 26 9 9 3 850
Oklahoma - 47 105 40 25 8 8 5 10 249
Oregon - 13 120 30 4 8 1 - 0 176
Pennsylvania 19 161 317 144 54 24 11 4 1 716
Rhode Island - 7 31 9 1 2 0 0 - 50
South Carolina - 94 113 30 21 7 4 1 1 270
South Dakota 7 - 42 13 5 6 1 1 - 69
Tennessee 1 273 91 24 11 6 3 2 6 416
Texas 20 154 484 261 144 76 29 13 6 1,167
Utah - 65 74 42 23 6 2 0 - 213
Vermont - 28 9 1 0 1 0 0 1 40
Virginia 2 43 219 118 42 27 3 6 2 460
Washington 0 49 149 44 21 14 11 4 4 297
West Virginia - 29 125 19 6 4 3 - 0 187
Wisconsin - 37 94 78 34 12 6 3 - 265
Wyoming 1 11 50 28 6 2 4 0 - 100
U.S. Total 711 3,947 6,515 2,492 1,254 952 366 228 239 15,994
Puerto Rico 4/ 2 - 30 74 47 44 28 7 6 236
Grand Total 713 3,947 6,545 2,566 1,301 996 394 235 245 16,230

March 2013
Table HM-64
4 of 4

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
OTHER FREEWAYS & 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 2 18 18 8 5 3 1 0 0 53 25 357 399 128 66 39 18 14 17 1,038
Alaska - - - - - - - - - - 1 2 19 22 35 16 11 7 11 122
Arizona 171 1 1 0 1 2 1 - 1 7 958 48 127 62 54 57 56 31 41 477
Arkansas 2 9 25 12 9 11 9 6 5 85 65 31 177 138 94 71 39 29 44 624
California 243 56 410 304 218 134 81 44 49 1,296 1,278 30 253 450 716 1,000 819 773 1,231 5,272
Colorado - 22 131 68 54 23 7 7 1 312 3 25 157 166 235 191 142 88 176 1,180
Connecticut - 21 106 49 30 15 9 5 4 240 - 1 41 115 142 136 83 64 100 681
Delaware 0 4 15 8 2 1 1 - 0 30 4 6 58 34 20 18 8 9 19 172
Dist. of Columbia - - - 3 2 1 2 4 5 17 3 0 - - - 3 6 3 88 101
Florida 13 153 277 58 29 19 8 6 4 553 276 736 1,486 487 245 138 76 48 122 3,339
Georgia 34 36 51 20 3 1 - - 1 113 705 316 596 190 69 29 9 6 4 1,219
Hawaii 0 2 8 6 5 3 2 2 5 33 7 35 49 35 29 22 15 11 30 226
Idaho - - - - - - - - - - 104 87 110 51 35 24 14 11 21 352
Illinois - 12 31 24 8 17 7 0 0 99 163 81 606 602 517 436 262 184 290 2,978
Indiana 6 58 36 26 15 10 8 4 5 164 21 268 481 239 191 178 152 111 219 1,840
Iowa - - - - - - - - - - 86 17 129 183 154 77 70 38 73 739
Kansas 2 19 119 33 8 4 3 - - 185 4 30 198 113 137 160 84 44 33 797
Kentucky 13 23 22 4 2 1 0 0 0 53 111 93 225 137 93 65 40 31 53 736
Louisiana - 3 - 18 7 10 8 5 - 52 85 17 186 177 163 119 113 100 125 1,000
Maine - - 9 4 4 0 0 0 1 19 - 5 27 25 32 17 15 11 10 143
Maryland 48 70 101 33 21 14 9 4 6 258 176 80 256 156 122 91 61 42 104 911
Massachusetts 31 81 115 40 22 14 8 5 10 294 354 12 124 196 234 232 181 151 360 1,491
Michigan - 79 133 63 29 10 7 4 4 329 6 122 325 277 315 308 184 252 516 2,299
Minnesota 6 9 58 41 23 9 7 3 0 152 72 63 224 101 78 57 27 21 26 598
Mississippi - 9 40 11 7 3 - - - 70 88 61 317 155 112 91 51 44 76 907
Missouri 13 145 198 57 26 11 7 4 4 452 251 104 299 164 96 54 40 27 49 832
Montana - - - - - - - - - - - 7 40 48 23 17 16 11 29 191
Nebraska - 9 33 8 - 27 3 7 5 92 115 8 33 17 34 64 44 43 48 291
Nevada 60 4 4 - 1 - - - - 9 284 25 21 5 2 2 1 0 1 57
New Hampshire - 29 21 1 1 0 1 - 0 52 0 20 77 47 20 19 15 9 13 220
New Jersey 2 49 158 83 44 25 16 12 15 402 128 42 203 218 199 178 159 141 435 1,576
New Mexico - - - - - - - - - - 46 59 155 129 123 65 52 31 32 648
New York 2 40 226 168 126 81 67 39 63 811 37 21 469 484 387 259 188 154 834 2,797
North Carolina 16 111 225 60 30 15 6 4 4 456 144 136 680 355 218 121 65 42 88 1,705
North Dakota - - - - - - - - - - 2 7 32 29 33 21 18 12 13 164
Ohio 2 49 253 83 44 28 9 10 6 482 5 67 538 458 399 327 186 133 314 2,421
Oklahoma - 10 102 34 18 14 5 2 3 188 6 35 166 186 147 141 108 93 177 1,054
Oregon 2 5 19 20 8 3 1 - 0 55 4 33 179 178 96 134 61 42 35 757
Pennsylvania 17 60 214 125 54 34 12 7 3 508 463 103 484 450 412 328 212 159 221 2,369
Rhode Island 1 4 26 30 16 6 3 1 1 87 15 - 5 23 35 90 59 63 72 346
South Carolina - 13 43 16 6 4 - 0 0 82 - 123 306 302 177 81 31 17 17 1,055
South Dakota 0 - 5 4 2 0 - - - 11 44 3 20 18 17 20 10 7 4 98
Tennessee 1 70 44 19 10 5 2 2 1 154 34 381 510 218 124 93 58 38 88 1,510
Texas 62 100 494 392 270 122 44 19 10 1,450 200 200 1,247 1,056 833 669 469 466 692 5,633
Utah - 5 12 2 1 - - - - 20 21 41 149 81 46 36 13 6 4 375
Vermont 4 3 8 1 1 0 0 0 0 14 7 3 25 16 13 9 6 6 17 96
Virginia 7 31 141 43 27 5 3 0 1 252 58 8 329 316 212 195 93 78 72 1,302
Washington 1 71 171 64 33 15 8 9 9 379 66 12 135 194 191 167 146 109 332 1,286
West Virginia - - 1 1 3 2 1 1 2 10 0 14 132 79 47 25 14 13 11 335
Wisconsin - 16 98 92 80 43 13 6 1 349 21 36 181 329 278 457 225 162 191 1,858
Wyoming 3 - - - - - - - - - 18 4 63 48 34 20 11 5 16 202
U.S. Total 765 1,511 4,200 2,136 1,306 745 380 220 231 10,730 6,563 4,011 13,047 9,687 8,081 7,166 4,839 3,991 7,598 58,419
Puerto Rico 4/ 2 - - 3 9 12 11 7 8 50 13 - 4 26 53 65 74 55 111 388
Grand Total 767 1,511 4,200 2,139 1,315 757 391 227 239 10,780 6,576 4,011 13,051 9,713 8,134 7,231 4,913 4,046 7,709 58,807

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. Includes structures.

2/ May include unpaved miles.

3/ Estimated from sample data.

4/ 2009 data.