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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Table HM-64 - Highway Statistics 2015

Highway Statistics 2015


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Functional System Length - 2015

October 2015
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 1 363 141 34 20 7 3 1 2 571
Alaska - 200 359 163 118 73 40 24 25 1,002
Arizona 1 497 290 75 32 11 4 2 4 916
Arkansas 0 194 137 41 18 8 5 3 3 409
California - 614 383 118 51 21 9 5 9 1,209
Colorado - 141 252 129 58 30 21 9 9 648
Connecticut - 12 10 4 2 0 0 0 0 29
Delaware - - - - - - - - - -
Dist. of Columbia - - - - - - - - - -
Florida 105 376 206 18 8 3 1 0 0 612
Georgia 1 239 201 55 22 10 4 2 2 534
Hawaii - - - - - - - - - -
Idaho - 275 172 41 16 7 4 3 3 521
Illinois - 665 444 119 16 - - - - 1,243
Indiana 141 377 141 40 27 18 11 6 7 627
Iowa 7 246 233 81 28 9 4 2 2 605
Kansas - 427 161 32 12 4 2 1 1 639
Kentucky 1 444 116 31 16 9 3 1 1 622
Louisiana 6 194 127 85 69 32 13 4 3 527
Maine - 203 70 20 4 2 0 0 0 299
Maryland 0 49 74 11 4 1 1 0 1 142
Massachusetts - 19 32 7 2 1 0 0 1 64
Michigan 5 214 220 60 31 17 11 5 3 561
Minnesota - 191 274 65 30 16 10 5 3 594
Mississippi 2 338 137 31 20 13 7 4 4 552
Missouri - 470 291 48 17 9 4 2 0 842
Montana - 411 552 87 24 12 5 2 2 1,094
Nebraska 8 266 99 26 11 3 1 1 1 407
Nevada 0 388 30 11 8 7 2 1 0 448
New Hampshire - 120 20 2 0 0 - - - 142
New Jersey - 22 18 3 1 1 1 0 0 45
New Mexico 1 562 200 46 22 8 4 2 1 845
New York 20 273 349 77 35 17 12 9 11 783
North Carolina 10 310 162 36 19 10 2 1 1 541
North Dakota - 237 231 33 7 3 0 0 0 511
Ohio 1 324 221 52 23 12 5 3 2 642
Oklahoma - 285 240 57 28 18 9 6 3 646
Oregon 0 247 176 50 13 5 2 1 1 495
Pennsylvania 0 431 488 110 41 25 8 4 4 1,112
Rhode Island - 14 3 0 0 - 0 0 0 18
South Carolina - 116 281 85 58 3 2 0 1 546
South Dakota - 231 290 43 17 7 3 0 0 591
Tennessee 10 490 54 10 5 3 1 0 0 564
Texas - 724 945 210 67 30 11 7 6 2,001
Utah 1 388 239 41 10 4 1 1 0 683
Vermont 0 204 46 5 2 1 0 0 - 258
Virginia 0 161 234 49 18 5 2 0 0 469
Washington - 174 140 50 27 16 9 7 6 429
West Virginia 11 118 143 19 9 5 3 1 1 298
Wisconsin 0 194 169 60 36 26 18 6 4 512
Wyoming - 362 306 71 39 17 6 4 3 808
U.S. Total 333 13,800 10,107 2,540 1,141 540 263 134 132 28,657
Puerto Rico (4) - - 1 10 4 11 5 4 7 42
Grand Total 333 13,800 10,108 2,550 1,145 551 268 138 139 28,699

October 2015
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 - - - - - - - - - - 13 906 831 148 67 34 17 9 10 2,022 20 858 1,429 608 331 115 41 15 9 3,405
Alaska - - - - - - - - - - 263 65 128 58 52 53 39 38 107 539 83 43 57 39 48 47 38 23 39 334
Arizona - 17 0 - 0 - 0 - - 18 19 417 451 156 87 45 18 9 8 1,191 8 220 426 260 152 85 41 23 14 1,221
Arkansas 0 4 35 18 13 9 3 1 1 85 1 257 822 366 209 122 57 32 32 1,896 21 373 1,444 490 297 191 86 65 48 2,996
California - 154 172 45 22 9 3 1 2 408 - 801 1,343 510 254 158 65 46 110 3,287 72 438 2,400 1,077 642 750 429 126 195 6,057
Colorado - 6 8 9 4 1 1 0 - 28 - 510 1,074 499 250 123 58 27 27 2,569 284 99 813 698 699 364 159 99 111 3,043
Connecticut - 10 17 3 1 1 2 1 1 36 - 1 22 26 25 20 12 5 9 119 0 - 22 37 54 52 24 17 15 221
Delaware 1 3 15 5 1 0 0 - 0 24 1 42 66 9 2 1 0 0 0 120 0 33 45 17 7 2 1 0 1 105
Dist. of Columbia - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Florida - 76 86 7 3 1 0 0 - 173 84 943 1,210 265 77 27 7 3 3 2,536 10 537 1,167 271 90 65 11 8 12 2,161
Georgia - - - - - - - - - - 20 765 1,146 255 93 39 16 7 9 2,330 37 582 1,251 465 174 41 19 9 8 2,548
Hawaii - - - - - - - - - - - 1 19 14 13 14 8 6 4 78 1 45 50 45 46 34 17 10 10 255
Idaho - - - - - - - - - - 45 454 817 252 99 44 19 10 10 1,706 6 233 590 184 87 33 21 13 14 1,176
Illinois - 1 17 - 12 - - - - 30 - 348 1,118 410 242 108 52 12 4 2,295 16 112 2,462 1,013 614 331 - 19 9 4,558
Indiana 5 68 38 16 9 3 1 0 1 136 41 541 516 169 86 43 22 11 19 1,408 13 650 760 326 170 106 54 35 17 2,118
Iowa - - - - - - - - - - 26 852 1,071 585 365 234 122 86 78 3,393 20 632 1,289 549 351 374 214 130 295 3,834
Kansas 1 169 188 31 10 3 1 0 0 403 7 1,513 838 148 61 30 13 8 9 2,620 34 2,080 1,615 326 82 55 37 24 13 4,231
Kentucky 4 306 131 23 14 8 3 1 1 487 169 454 421 99 40 17 7 4 4 1,047 21 157 619 310 153 76 31 13 16 1,374
Louisiana 0 0 8 7 5 2 1 1 0 24 2 153 437 172 104 67 43 25 29 1,029 17 219 776 347 218 142 73 36 63 1,874
Maine - - - - - - - - - - - 142 386 108 63 47 18 14 12 789 5 129 413 150 102 58 40 26 35 953
Maryland - - - - - - - - - - 1 150 134 22 11 8 5 2 4 334 3 187 352 111 48 20 3 3 0 726
Massachusetts - 3 4 1 1 1 0 0 0 10 - 12 37 26 15 6 3 2 3 105 1 9 103 57 47 46 28 16 10 315
Michigan 1 188 99 28 10 9 6 2 2 344 0 921 804 206 95 52 22 12 19 2,130 10 950 2,129 673 335 217 126 86 157 4,673
Minnesota - - 1 1 0 1 0 0 0 4 29 1,172 1,104 518 294 174 91 50 49 3,452 16 2,093 2,088 791 456 316 157 211 409 6,520
Mississippi - - - - - - - - - - - 500 752 247 138 78 33 17 19 1,783 30 497 1,232 642 534 406 251 97 86 3,746
Missouri - 381 417 92 24 7 3 0 1 926 1 653 894 260 114 58 28 15 9 2,032 25 173 1,440 1,200 596 330 121 62 44 3,965
Montana - - - - - - - - - - - 690 1,339 386 165 80 50 28 36 2,773 9 434 1,414 473 243 130 53 37 59 2,843
Nebraska 35 63 131 51 25 14 6 4 3 297 216 1,055 633 198 107 67 34 19 24 2,136 25 1,119 1,086 582 371 222 119 90 91 3,680
Nevada - - - - - - - - - - 14 844 469 90 21 13 14 16 24 1,490 1 136 430 113 30 7 4 1 1 721
New Hampshire - 9 0 - - - - - - 9 0 143 105 25 14 11 9 6 11 324 4 167 201 68 35 33 30 22 70 626
New Jersey - 9 19 6 1 1 0 0 0 35 0 29 38 23 24 16 10 7 11 157 1 8 73 71 39 39 24 6 6 267
New Mexico - - - - - - - - - - 54 813 651 198 110 63 24 15 13 1,887 7 465 503 395 306 152 117 84 93 2,116
New York 6 16 57 15 8 5 3 1 2 107 9 242 1,003 420 212 118 59 32 35 2,122 18 197 1,141 695 353 199 91 87 109 2,873
North Carolina 10 216 152 18 7 3 1 0 0 397 31 250 811 256 111 42 18 10 17 1,517 9 141 1,293 691 449 181 72 60 76 2,963
North Dakota - - - - - - - - - - 3 1,092 1,136 403 166 84 32 20 25 2,960 5 713 1,125 352 149 102 38 21 18 2,516
Ohio 0 125 141 36 16 8 3 1 1 331 4 421 678 231 96 45 20 10 11 1,513 12 504 1,320 464 203 82 38 12 26 2,649
Oklahoma - - - - - - - - - - 1 445 936 385 209 130 65 38 43 2,251 19 549 1,164 265 530 87 21 39 9 2,664
Oregon - - - - - - - - - - 0 596 1,326 417 166 72 36 21 23 2,657 13 238 966 474 278 139 58 33 34 2,222
Pennsylvania 1 133 146 29 20 12 8 5 4 357 1 306 709 266 121 73 36 22 29 1,562 - 271 1,524 1,193 562 403 233 137 220 4,543
Rhode Island - 4 2 3 1 1 0 - - 11 - 0 12 13 18 18 13 9 14 97 0 5 9 9 13 11 9 8 8 72
South Carolina - 5 28 9 3 0 - - - 45 - 38 673 379 302 78 36 24 15 1,546 - 330 943 908 398 228 178 - - 2,986
South Dakota - 81 127 40 27 11 4 1 1 291 - 298 1,072 588 298 162 84 50 42 2,593 5 462 1,207 556 325 191 109 73 39 2,962
Tennessee - - - - - - - - - - 9 779 657 157 68 40 16 7 6 1,729 17 1,003 1,132 301 150 98 31 122 98 2,936
Texas - 0 2 1 0 0 0 - - 4 18 1,764 3,695 1,590 761 340 140 70 60 8,420 80 1,056 3,752 2,325 1,323 717 278 115 130 9,697
Utah - 0 4 3 1 1 - 0 - 9 326 163 409 143 66 33 12 6 5 838 2 40 195 147 107 87 47 19 14 655
Vermont - 0 1 0 - - - - - 2 1 57 143 50 27 13 7 6 7 311 5 167 316 74 50 30 25 21 44 727
Virginia 7 15 51 11 2 1 0 0 0 81 23 153 681 265 104 41 17 9 4 1,273 14 150 1,528 901 342 148 59 37 18 3,182
Washington - 144 268 107 39 19 13 10 13 614 - 204 647 247 108 54 24 13 15 1,312 10 285 705 394 249 179 85 68 56 2,021
West Virginia - 1 5 2 1 0 0 - - 9 5 92 401 216 127 66 35 22 30 990 362 5 354 353 229 119 60 50 27 1,197
Wisconsin - 36 34 26 25 12 5 3 1 142 - 670 977 528 335 164 96 64 97 2,931 11 1,038 1,019 734 640 444 273 194 404 4,746
Wyoming - - - - - - - - - - 29 445 921 336 147 62 23 12 9 1,955 4 194 557 235 112 64 29 19 17 1,227
U.S. Total 72 2,244 2,403 642 303 144 68 36 34 5,876 1,463 24,161 36,561 13,340 6,742 3,488 1,686 986 1,192 88,155 1,387 21,026 48,927 23,458 13,818 8,350 4,101 2,526 3,297 125,503
Puerto Rico (4) - - - - - - - - - - 1 - 1 3 23 6 2 - 7 42 13 - - - - 18 30 38 132 218
Grand Total 72 2,244 2,403 642 303 144 68 36 34 5,876 1,464 24,161 36,562 13,343 6,765 3,494 1,688 986 1,199 88,197 1,400 21,026 48,927 23,458 13,818 8,368 4,131 2,564 3,429 125,721

October 2015
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 2 218 109 32 25 16 11 8 8 427
Alaska - 17 40 11 5 3 2 1 1 79
Arizona 0 148 71 21 8 3 1 1 0 252
Arkansas 0 90 101 39 22 18 11 6 6 293
California 0 349 448 150 110 76 48 26 34 1,241
Colorado - 67 121 60 32 12 5 3 4 304
Connecticut - 130 104 40 21 11 5 4 3 317
Delaware 5 3 21 7 2 1 0 0 0 36
Dist. of Columbia - - - - 5 2 0 1 4 12
Florida 98 314 273 51 24 10 5 1 1 680
Georgia 2 357 216 66 34 17 9 6 5 710
Hawaii - 1 12 9 10 9 5 4 4 55
Idaho - 36 34 11 5 3 1 1 1 90
Illinois - 256 469 113 79 17 6 1 2 942
Indiana 94 148 105 64 36 21 14 8 10 404
Iowa 4 50 75 23 11 7 3 2 1 172
Kansas 3 101 69 29 16 9 5 2 1 232
Kentucky - 114 65 18 12 6 3 2 2 220
Louisiana 1 105 90 54 49 51 23 17 15 403
Maine - 33 19 6 3 2 1 1 1 66
Maryland 1 115 132 33 19 13 8 7 10 337
Massachusetts 2 300 140 21 11 8 5 6 15 508
Michigan 3 182 264 90 52 41 25 17 13 683
Minnesota 9 71 130 52 24 15 10 4 6 312
Mississippi - 131 63 22 16 11 5 3 2 253
Missouri 0 256 179 46 25 16 8 4 3 538
Montana - 39 44 7 3 2 1 0 1 98
Nebraska 6 20 25 8 4 2 1 1 - 61
Nevada 0 79 31 18 12 6 2 1 0 150
New Hampshire - 64 14 3 1 1 0 0 - 83
New Jersey 1 128 138 42 23 16 10 11 17 386
New Mexico 0 102 27 10 8 4 1 1 1 153
New York 22 209 378 116 68 46 33 22 48 919
North Carolina 34 267 273 82 37 15 6 3 2 686
North Dakota - 17 30 8 3 2 0 - 0 60
Ohio 0 349 355 96 61 36 16 9 9 931
Oklahoma 0 71 119 39 21 15 9 5 8 286
Oregon - 81 106 22 9 7 5 3 2 234
Pennsylvania 7 211 321 88 58 33 16 12 10 748
Rhode Island - 19 23 5 2 1 1 1 1 52
South Carolina - 48 128 65 37 19 5 2 0 304
South Dakota - 11 50 14 7 4 1 0 0 88
Tennessee 4 371 96 29 15 7 4 2 3 526
Texas 1 315 568 235 142 82 38 21 14 1,415
Utah 0 89 96 37 16 10 4 1 0 253
Vermont 2 35 19 4 1 1 0 - - 60
Virginia 15 152 289 104 48 26 12 6 3 638
Washington - 113 122 46 20 12 7 7 7 335
West Virginia 3 101 91 21 14 8 3 1 2 241
Wisconsin - 105 96 78 37 23 14 6 5 363
Wyoming - 26 45 18 7 4 2 1 2 106
U.S. Total 321 6,615 6,835 2,260 1,310 777 411 249 285 18,742
Puerto Rico (4) 2 - 30 74 47 44 28 7 6 236
Grand Total 323 6,615 6,865 2,334 1,357 821 439 256 291 18,978

October 2015
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 0 11 8 4 1 1 1 0 0 26 132 427 441 123 65 44 25 16 24 1,165
Alaska - - - - - - - - - - - 10 43 24 17 13 9 6 13 136
Arizona 22 72 87 19 9 4 1 0 1 192 181 87 176 122 91 59 38 27 62 662
Arkansas 6 16 42 19 12 8 6 5 3 110 29 41 182 119 85 55 37 24 57 601
California - 317 569 265 169 107 58 38 53 1,576 - 195 504 635 738 779 698 643 2,388 6,579
Colorado - 27 136 67 42 25 13 7 7 324 0 55 188 161 180 158 100 79 145 1,068
Connecticut - 51 112 40 18 10 4 3 7 244 - 4 61 97 109 95 71 57 217 710
Delaware 2 7 16 5 1 0 0 0 0 30 5 26 83 31 18 11 6 5 10 189
Dist. of Columbia - - - 2 3 4 2 2 3 16 - - - - - 2 1 3 101 107
Florida 39 188 252 46 23 13 6 4 2 533 171 868 1,644 607 320 158 83 50 73 3,805
Georgia 30 42 42 19 14 8 4 2 2 133 299 531 853 262 141 74 40 29 77 2,006
Hawaii - - 4 6 7 5 3 3 5 34 - 20 48 43 37 40 24 18 36 265
Idaho - - - - - - - - - - 67 64 122 63 40 33 26 18 38 405
Illinois - 6 49 17 17 8 12 - - 109 - 196 719 670 569 347 216 186 247 3,150
Indiana 41 43 36 22 13 7 3 3 2 129 619 220 332 159 112 82 52 37 64 1,057
Iowa - - - - - - - - - - 58 68 183 168 130 94 57 48 101 848
Kansas 0 76 67 17 13 7 3 4 1 187 13 72 104 44 36 24 15 13 16 325
Kentucky 3 33 17 7 5 3 2 1 0 70 104 130 168 74 52 38 18 15 26 522
Louisiana 0 7 10 8 10 14 10 7 7 72 90 85 204 144 122 107 83 69 169 984
Maine - 4 8 1 2 2 0 1 0 18 - 7 47 21 16 11 9 5 18 134
Maryland 1 79 131 36 23 14 7 4 9 303 14 160 320 161 126 94 69 50 189 1,169
Massachusetts 2 105 108 35 21 16 10 7 18 320 117 36 205 266 274 266 202 172 442 1,863
Michigan 0 89 158 54 25 12 8 6 5 356 31 122 458 370 313 265 202 167 432 2,330
Minnesota 3 28 65 29 14 10 5 4 5 159 23 175 270 119 70 46 24 22 59 785
Mississippi - 17 29 8 5 3 2 1 1 64 7 115 257 158 108 80 56 40 135 949
Missouri 4 152 199 57 29 18 10 5 5 475 29 117 305 144 101 73 45 31 58 873
Montana - - - - - - - - - - 6 25 65 45 31 21 16 12 32 248
Nebraska 23 18 39 15 8 7 5 4 8 104 119 16 42 34 36 34 26 24 64 276
Nevada 0 28 9 8 7 2 1 0 0 55 4 124 111 46 28 17 9 7 12 354
New Hampshire - 56 14 3 1 0 0 0 0 74 1 43 67 35 21 14 10 8 22 221
New Jersey 1 128 183 53 29 21 14 8 16 452 3 86 292 237 225 208 155 141 456 1,801
New Mexico - 1 8 2 0 0 - - - 11 72 90 145 93 83 66 42 30 63 612
New York 4 54 244 134 99 89 63 47 79 810 33 76 626 477 366 287 212 184 836 3,065
North Carolina 30 130 201 56 25 12 4 2 4 435 60 131 685 408 261 150 83 55 143 1,917
North Dakota - - - - - - - - - - - 18 46 35 29 21 12 8 19 188
Ohio 2 174 249 66 39 25 12 7 8 579 17 182 572 396 321 260 180 140 358 2,411
Oklahoma 3 35 79 29 20 16 7 4 5 195 65 82 195 168 147 132 108 95 176 1,104
Oregon - 23 21 7 2 1 1 0 1 57 5 98 256 155 100 71 48 37 85 851
Pennsylvania 2 77 195 99 68 41 22 11 11 524 9 150 605 479 408 338 227 186 410 2,804
Rhode Island 0 8 31 15 10 6 4 2 3 80 1 2 20 30 49 51 41 41 108 341
South Carolina - 10 43 18 6 3 3 0 0 84 - 26 272 321 233 127 39 26 21 1,064
South Dakota - 1 9 4 2 1 1 0 0 18 0 6 28 21 17 14 14 10 23 134
Tennessee 9 64 50 16 10 6 4 2 2 155 45 532 588 238 129 94 52 41 75 1,750
Texas 7 189 583 311 196 122 57 23 20 1,503 128 488 1,566 1,014 741 588 381 307 870 5,955
Utah 11 14 13 4 1 1 0 0 0 33 113 98 208 96 58 35 18 13 13 537
Vermont 0 3 8 2 1 1 0 0 0 16 5 10 34 19 13 9 6 5 13 108
Virginia 14 67 160 57 26 19 8 4 4 345 41 98 497 353 251 181 113 78 115 1,684
Washington - 113 181 55 25 15 8 7 13 417 19 47 249 243 182 157 108 96 339 1,421
West Virginia - 0 3 2 2 2 2 1 2 14 6 26 154 84 53 34 22 15 20 409
Wisconsin - 40 86 80 59 32 14 7 11 329 3 85 279 293 303 268 167 144 401 1,940
Wyoming - 1 0 0 0 0 0 - 0 3 12 23 68 40 27 16 11 10 22 217
U.S. Total 261 2,602 4,555 1,819 1,111 725 401 237 327 11,777 2,756 6,396 15,586 10,147 7,984 6,240 4,307 3,543 9,895 64,099
Puerto Rico (4) 2 - - 3 9 12 11 7 8 50 13 - 4 26 53 65 74 55 111 388
Grand Total 263 2,602 4,555 1,822 1,120 737 412 244 335 11,827 2,769 6,396 15,590 10,173 8,037 6,305 4,381 3,598 10,006 64,487

(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.

 

Page last modified on December 7, 2016
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