Skip to contentU.S. Department of Transportation/Federal Highway Administration
Office of Highway Policy Information

Highway Statistics Series

Highway Statistics 1998


Printable Excel Version [121 KB]
Printable PDF Version [49 KB]

To view PDF files, you can use the Acrobat® Reader®.
To view XLS files, you can use the Excel Viewer

FUNCTIONAL SYSTEM LENGTH – 1998

PAVED MILES BY MEASURED PAVEMENT ROUGHNESS – RURAL

OCTOBER 1999
TABLE HM-64
SHEET 1 OF 4

Rural

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE
NOT REPORTED < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
Alabama 0 94 348 95 43 21 0 0 0 601
Alaska 0 12 238 337 326 30 69 13 5 1,030
Arizona 0 363 518 76 24 2 12 1 1 997
Arkansas 0 0 56 38 50 83 51 49 66 393
California 0 7 608 298 240 124 40 13 27 1,357
Colorado 0 9 187 154 177 137 38 56 11 769
Connecticut 0 1 66 15 13 4 1 0 2 102
Delaware 0 0 0 0 0 0 0 0 0 0
Dist. of Columbia 0 0 0 0 0 0 0 0 0 0
Florida 45 703 70 45 75 16 0 0 0 909
Georgia 0 620 175 12 0 0 0 0 0 807
Hawaii 6 0 0 0 0 0 0 0 0 0
Idaho 0 168 257 83 10 0 7 0 1 526
Illinois 1,518 0 0 0 0 0 0 0 0 0
Indiana 0 292 393 76 34 58 0 0 0 853
Iowa 0 61 323 203 41 6 1 0 0 635
Kansas 0 254 303 50 69 15 7 0 0 698
Kentucky 0 131 215 33 102 54 0 0 0 535
Louisiana 37 0 140 145 91 142 27 6 23 574
Maine 41 38 206 26 2 0 0 0 0 272
Maryland 0 12 164 45 6 1 1 0 0 229
Massachusetts 0 3 86 65 6 0 0 0 1 161
Michigan 0 35 257 172 130 82 42 20 4 742
Minnesota 0 47 299 165 85 30 35 10 10 681
Mississippi 0 12 212 152 69 83 23 1 5 557
Missouri 0 7 230 260 213 79 16 1 0 806
Montana 0 275 576 154 76 43 5 5 0 1,134
Nebraska 0 95 139 57 63 57 25 0 0 436
Nevada 0 228 145 42 24 12 21 4 4 480
New Hampshire 0 51 95 24 6 0 0 0 0 176
New Jersey 6 0 32 34 18 6 12 8 3 113
New Mexico 0 204 364 217 56 27 16 7 1 892
New York 0 0 521 151 79 26 10 2 7 796
North Carolina 0 28 161 109 109 144 63 21 1 636
North Dakota 0 73 314 105 38 0 0 0 0 530
Ohio 0 328 427 55 19 1 0 0 0 830
Oklahoma 0 81 351 147 105 14 22 1 1 722
Oregon 0 0 4 39 151 165 103 77 41 580
Pennsylvania 0 42 713 297 101 41 6 0 1 1,201
Rhode Island 0 0 18 4 0 0 0 0 0 22
South Carolina 0 271 289 91 21 0 0 0 0 672
South Dakota 23 0 199 175 83 112 33 3 0 605
Tennessee 637 20 62 4 12 0 0 0 0 98
Texas 0 303 1,411 351 99 49 2 0 1 2,216
Utah 0 239 318 117 49 31 13 3 0 770
Vermont 0 100 146 19 13 3 0 0 0 281
Virginia 0 7 356 284 56 9 4 0 0 716
Washington 0 211 218 51 19 0 2 0 0 501
West Virginia 0 78 214 69 56 33 3 2 0 455
Wisconsin 0 46 199 145 135 42 8 1 0 576
Wyoming 0 252 369 134 52 19 0 0 0 826
U.S. Total 2,313 5,801 12,992 5,420 3,246 1,801 718 304 216 30,498
Puerto Rico 0 0 5 24 51 15 5 0 3 103
Grand Total 2,313 5,801 12,997 5,444 3,297 1,816 723 304 219 30,601

OCTOBER 1999
TABLE HM-64
SHEET 2 OF 4

Rural

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
OTHER PRINCIPAL ARTERIAL MINOR ARTERIAL
NOT
REPORTED
< 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
NOT
REPORTED
< 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
Alabama 0 157 1,113 605 142 43 6 2 7 2,075 0 406 1,393 1,209 555 93 38 0 0 3,694
Alaska 455 6 90 68 134 16 29 11 0 354 212 0 61 0 118 9 0 37 0 225
Arizona 0 152 389 317 161 80 47 17 22 1,185 0 160 374 214 346 72 53 17 22 1,258
Arkansas 36 9 711 699 386 221 109 44 15 2,194 37 0 682 846 541 463 316 49 14 2,911
California 0 32 1,043 1,135 891 439 96 48 4 3,688 0 298 1,264 1,758 1,551 1,179 352 244 254 6,900
Colorado 0 6 269 475 487 337 139 229 256 2,198 0 0 562 623 1,121 439 208 420 309 3,682
Connecticut 0 3 58 89 64 31 11 4 3 263 0 0 12 134 248 48 31 14 12 499
Delaware 0 5 88 90 23 3 4 3 2 218 0 0 51 18 17 5 4 7 3 105
Dist. of Columbia 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Florida 86 1,615 1,403 312 141 98 20 19 24 3,632 242 575 1,323 200 176 36 30 0 0 2,340
Georgia 0 2,309 442 35 2 2 0 0 0 2,790 0 4,707 721 174 0 0 0 0 0 5,602
Hawaii 125 0 0 0 0 0 0 0 0 0 375 0 0 0 0 0 0 0 0 0
Idaho 1 276 654 462 200 65 9 4 3 1,673 4 180 424 423 159 80 24 0 15 1,305
Illinois 2,631 0 0 0 0 0 0 0 0 0 4,830 0 0 0 0 0 0 0 0 0
Indiana 4 211 643 373 269 150 46 11 2 1,705 6 142 875 731 171 234 64 12 0 2,229
Iowa 131 322 1,125 616 453 398 266 49 69 3,298 386 554 830 312 734 539 314 167 119 3,569
Kansas 70 715 1,553 519 201 76 20 15 3 3,102 7 1,120 1,897 800 152 67 141 5 104 4,286
Kentucky 0 256 1,248 254 153 117 17 0 2 2,047 0 1 874 350 327 53 2 0 1 1,608
Louisiana 21 17 359 253 190 154 130 80 31 1,214 0 3 350 265 408 153 118 104 156 1,557
Maine 7 101 398 170 64 25 9 7 7 781 41 74 473 175 159 41 58 40 11 1,031
Maryland 0 49 330 110 27 16 10 3 3 548 0 61 515 225 115 65 7 2 0 990
Massachusetts 9 0 97 114 38 32 10 10 2 303 137 0 77 214 56 142 15 13 15 532
Michigan 18 330 1,046 620 348 223 89 52 36 2,744 0 851 1,658 645 417 349 61 35 65 4,081
Minnesota 0 635 1,267 725 501 197 129 45 77 3,576 0 359 2,878 1,277 1,039 435 17 232 45 6,282
Mississippi 0 15 625 489 469 176 38 25 13 1,850 0 0 1,259 1,300 1,000 260 34 49 16 3,918
Missouri 51 61 562 922 783 477 183 35 26 3,049 0 0 685 1,021 693 633 353 49 12 3,446
Montana 0 259 1,359 543 226 140 63 24 9 2,623 0 220 1,414 720 402 181 48 0 0 2,985
Nebraska 0 520 946 381 387 173 167 93 48 2,715 0 565 1,589 579 491 382 267 96 231 4,200
Nevada 0 164 606 169 338 86 23 0 2 1,388 0 93 281 155 113 79 0 4 0 725
New Hampshire 0 64 234 85 30 20 12 7 5 457 0 53 218 109 70 10 11 6 8 485
New Jersey 88 0 43 88 99 77 40 36 61 444 90 0 65 60 72 108 23 18 53 399
New Mexico 5 80 567 427 318 192 70 58 81 1,793 32 26 448 421 285 171 200 3 281 1,835
New York 16 2 996 389 183 147 111 62 93 1,983 32 11 1,976 932 412 210 125 187 234 4,087
North Carolina 36 19 807 518 421 258 92 42 42 2,199 68 22 659 749 643 414 324 46 77 2,934
North Dakota 0 348 1,381 800 265 85 43 7 2 2,931 0 165 1,136 973 206 31 3 0 0 2,514
Ohio 0 394 1,431 244 99 40 11 3 4 2,226 0 420 1,841 302 233 24 0 0 10 2,830
Oklahoma 0 52 1,038 617 326 198 92 25 18 2,366 0 185 684 907 517 367 54 16 19 2,749
Oregon 4 0 563 1,159 806 174 47 31 48 2,828 0 12 347 469 533 290 295 88 177 2,211
Pennsylvania 1 107 908 658 410 246 91 45 28 2,493 0 334 2,488 94 614 1,510 0 65 0 5,105
Rhode Island 0 0 26 21 12 6 1 1 0 67 0 2 37 12 10 10 0 2 2 75
South Carolina 0 106 569 388 207 115 27 22 20 1,454 0 370 1,084 754 903 390 35 67 57 3,660
South Dakota 114 26 481 525 595 437 210 94 58 2,426 83 0 686 905 786 466 245 131 49 3,268
Tennessee 1,615 22 127 30 15 9 0 0 0 203 60 59 1,766 704 293 347 182 0 0 3,351
Texas 0 726 3,049 2,086 691 205 53 27 24 6,861 0 827 3,907 3,040 1,371 298 147 40 12 9,642
Utah 0 88 534 225 114 38 5 2 2 1,008 0 77 518 511 250 149 6 16 8 1,535
Vermont 0 13 68 54 75 53 23 11 19 316 0 21 210 121 90 129 56 44 64 735
Virginia 0 6 606 539 239 106 22 17 21 1,556 0 0 610 1,099 1,197 416 48 26 26 3,422
Washington 0 338 1,277 348 83 24 5 4 2 2,081 22 150 950 521 237 47 5 19 26 1,955
West Virginia 0 153 428 256 156 62 13 5 8 1,081 0 251 402 470 232 128 16 34 0 1,533
Wisconsin 0 166 958 762 596 400 213 144 122 3,361 0 306 1,382 944 776 464 650 432 32 4,986
Wyoming 0 575 1,202 147 42 16 4 0 0 1,986 0 149 801 253 56 55 5 0 1 1,320
U.S. Total 5,524 11,510 35,717 20,911 12,860 6,683 2,855 1,473 1,324 93,333 6,664 13,809 44,737 28,718 20,895 12,071 4,985 2,836 2,540 130,591
Puerto Rico 36 0 0 3 4 31 19 3 3 63 168 0 0 0 5 32 51 24 11 123
Grand Total 5,560 11,510 35,717 20,914 12,864 6,714 2,874 1,476 1,327 93,396 6,832 13,809 44,737 28,718 20,900 12,103 5,036 2,860 2,551 130,714

OCTOBER 1999
SHEET 3 OF 4
TABLE HM-64

Urban

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
INTERSTATE
NOT REPORTED < 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
Alabama 0 23 127 70 44 35 5 0 0 304
Alaska 0 0 22 24 5 2 0 0 0 53
Arizona 0 34 85 24 26 1 2 0 0 172
Arkansas 1 2 14 34 28 24 17 15 13 147
California 0 24 146 201 285 231 103 62 18 1,070
Colorado 0 2 51 36 44 34 7 1 8 183
Connecticut 0 1 85 78 40 22 10 5 4 245
Delaware 0 0 7 11 8 3 6 3 3 41
Dist. of Columbia 0 0 1 2 4 1 1 2 2 13
Florida 41 271 114 40 29 23 0 0 0 477
Georgia 0 351 80 3 2 0 0 0 0 436
Hawaii 49 0 0 0 0 0 0 0 0 0
Idaho 0 17 36 8 12 11 0 1 0 85
Illinois 647 0 0 0 0 0 0 0 0 0
Indiana 0 63 150 61 16 15 10 3 0 318
Iowa 0 0 50 32 34 10 19 2 0 147
Kansas 3 20 69 66 12 4 0 0 0 171
Kentucky 0 44 91 29 29 24 2 1 6 226
Louisiana 23 0 11 73 33 80 43 4 15 259
Maine 10 6 27 7 1 1 0 0 0 42
Maryland 0 5 109 66 32 16 11 8 6 253
Massachusetts 2 0 187 135 49 27 1 2 1 402
Michigan 0 15 129 131 95 56 41 18 15 500
Minnesota 0 21 113 51 31 10 4 2 0 232
Mississippi 0 1 13 28 58 19 3 5 1 128
Missouri 0 1 51 128 102 61 16 7 5 371
Montana 0 4 29 16 6 2 0 1 0 58
Nebraska 0 2 18 7 9 4 4 1 0 45
Nevada 0 14 33 13 15 10 1 0 0 86
New Hampshire 0 14 26 7 0 0 1 0 0 48
New Jersey 17 0 26 72 35 44 46 17 44 284
New Mexico 0 21 25 30 13 6 9 3 1 108
New York 4 0 258 131 79 66 57 32 76 699
North Carolina 0 1 128 64 73 31 19 26 11 353
North Dakota 0 14 17 9 0 0 0 0 0 40
Ohio 0 195 392 105 31 15 4 1 0 743
Oklahoma 0 3 61 43 32 30 19 11 9 208
Oregon 0 0 0 6 15 33 29 26 37 146
Pennsylvania 3 7 247 156 85 33 13 4 2 547
Rhode Island 0 0 15 13 11 6 1 0 0 46
South Carolina 0 39 79 24 11 1 2 1 0 157
South Dakota 3 0 4 8 9 20 6 0 0 47
Tennessee 237 4 57 17 11 8 3 1 1 102
Texas 0 30 346 309 241 72 18 1 1 1,018
Utah 0 31 46 36 27 13 12 2 0 167
Vermont 0 9 29 2 0 0 0 0 0 40
Virginia 0 2 94 162 95 29 6 12 1 401
Washington 0 65 108 29 24 27 5 4 0 262
West Virginia 0 21 43 13 9 5 3 0 1 95
Wisconsin 0 5 23 35 45 41 11 5 4 169
Wyoming 0 7 37 19 17 6 1 0 0 87
U.S. Total 1,040 1,389 3,909 2,664 1,912 1,212 571 289 285 12,231
Puerto Rico 2 0 5 35 39 25 16 8 17 145
Grand Total 1,042 1,389 3,914 2,699 1,951 1,237 587 297 302 12,376

 

OCTOBER 1999
SHEET 4 of 4
TABLE HM-64

Urban

STATE INTERNATIONAL ROUGHNESS INDEX (IRI) 1/
OTHER FREEWAYS AND EXPRESSWAYS OTHER PRINCIPAL ARTERIAL
NOT
REPORTED
< 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
NOT
REPORTED
< 60 60-94 95-119 120-144 145-170 171-194 195-220 > 220 TOTAL
REPORTED
Alabama 0 1 12 4 1 2 0 1 0 21 7 85 414 294 140 40 5 8 5 991
Alaska 0 0 0 0 0 0 0 0 0 0 0 0 9 27 7 8 4 0 0 55
Arizona 0 18 48 21 10 4 0 0 0 101 0 201 479 107 112 63 33 16 18 1,029
Arkansas 3 1 46 13 8 25 8 4 5 110 62 0 59 115 93 90 44 42 74 517
California 0 38 242 300 386 271 88 45 26 1,396 1 89 275 518 1,008 995 962 771 1,224 5,842
Colorado 0 2 33 72 63 40 4 8 0 222 1 1 64 210 151 110 62 171 89 858
Connecticut 1 0 59 62 30 23 12 7 3 196 5 0 12 73 138 144 95 50 90 602
Delaware 0 0 5 5 0 1 0 0 0 11 0 17 48 32 14 8 4 3 8 134
Dist. of Columbia 2 1 0 0 5 3 1 2 4 16 10 0 0 0 1 1 4 6 75 87
Florida 19 188 170 13 27 2 0 0 0 400 290 511 1,096 377 217 87 51 32 27 2,398
Georgia 1 115 41 1 5 0 2 0 0 164 8 1,126 512 71 29 6 1 0 0 1,745
Hawaii 34 0 0 0 0 0 0 0 0 0 138 0 0 0 0 0 0 0 0 0
Idaho 0 0 0 0 0 0 0 0 0 0 18 8 42 38 45 33 34 18 22 240
Illinois 82 0 0 0 0 0 0 0 0 0 2,603 0 0 0 0 0 0 0 0 0
Indiana 7 11 26 26 22 18 16 3 6 128 446 36 220 248 194 137 118 48 100 1,101
Iowa 0 0 0 0 0 0 0 0 0 0 110 11 117 114 91 103 50 35 85 606
Kansas 13 14 47 24 18 11 3 2 3 122 434 14 65 33 40 29 19 10 6 216
Kentucky 0 6 38 19 9 8 6 6 0 92 0 20 269 205 50 67 16 17 8 652
Louisiana 1 0 0 4 11 7 14 3 6 45 131 7 113 92 84 91 84 89 152 712
Maine 6 0 6 3 1 0 0 1 1 12 31 2 54 30 19 16 8 5 10 144
Maryland 0 9 83 54 34 20 17 9 9 235 0 9 113 139 117 121 74 69 217 859
Massachusetts 15 0 69 93 14 8 0 1 4 189 651 0 50 170 211 193 106 78 96 904
Michigan 3 0 36 68 44 40 18 10 5 221 17 13 103 141 193 405 270 271 563 1,959
Minnesota 0 11 54 40 22 10 5 1 1 144 0 55 134 102 89 60 29 24 41 534
Mississippi 0 0 16 11 8 6 0 0 0 41 0 0 93 122 141 114 50 30 78 628
Missouri 5 0 29 48 98 60 47 19 13 314 377 0 27 106 147 146 80 84 79 669
Montana 0 0 0 0 0 0 0 0 0 0 3 2 27 36 33 23 13 14 24 172
Nebraska 0 0 1 3 10 3 1 0 0 18 103 8 29 29 43 45 51 31 76 312
Nevada 0 4 20 10 1 0 1 1 0 37 0 4 74 71 32 22 7 6 14 230
New Hampshire 0 3 29 3 3 3 0 0 0 41 0 10 61 28 24 18 8 9 13 171
New Jersey 96 0 31 68 46 25 14 8 26 218 346 0 86 146 248 239 95 96 52 962
New Mexico 3 0 0 0 0 0 0 0 0 0 160 7 61 111 70 45 22 22 19 357
New York 11 6 185 143 117 116 72 69 107 815 85 0 308 318 295 258 167 140 941 2,427
North Carolina 18 3 104 36 42 36 25 11 13 270 122 4 240 266 244 172 117 58 144 1,245
North Dakota 0 0 0 0 0 0 0 0 0 0 0 7 38 28 21 23 12 11 24 164
Ohio 0 41 153 94 50 26 10 6 5 385 0 56 509 448 363 232 139 92 140 1,979
Oklahoma 0 0 44 31 26 13 12 5 3 134 1 3 69 116 112 131 91 114 165 801
Oregon 0 0 5 17 17 6 4 2 3 54 1 0 30 155 218 141 57 31 32 664
Pennsylvania 1 6 116 89 95 87 50 25 18 486 4 17 213 346 388 463 279 223 335 2,264
Rhode Island 0 0 29 20 16 1 2 0 0 68 13 0 53 73 78 48 27 30 17 326
South Carolina 0 6 34 14 7 4 1 3 1 70 0 21 198 176 110 87 41 32 37 702
South Dakota 0 0 0 0 0 0 0 0 0 0 92 0 7 3 9 9 3 1 8 40
Tennessee 72 1 18 9 6 4 1 2 1 42 1,151 9 93 29 15 7 4 2 5 164
Texas 0 52 297 378 269 200 17 4 7 1,224 0 149 855 830 798 539 1,408 157 175 4,911
Utah 0 3 4 0 0 0 0 0 0 7 0 29 89 78 34 27 10 5 7 279
Vermont 0 0 10 6 1 1 0 0 0 18 0 2 10 19 20 15 9 7 15 97
Virginia 0 0 55 75 48 16 9 3 2 208 0 0 150 280 243 163 91 108 101 1,136
Washington 4 31 153 55 34 17 11 4 4 309 805 25 92 70 49 22 10 9 18 295
West Virginia 0 1 1 4 2 1 0 0 0 9 0 22 82 44 25 14 11 3 2 203
Wisconsin 0 5 27 32 37 35 19 12 9 176 1 4 91 149 191 226 171 149 336 1,317
Wyoming 0 0 3 0 0 0 0 0 0 3 19 28 74 27 30 11 5 6 5 186
U.S. Total 397 577 2,379 1,968 1,643 1,153 490 277 285 8,772 8,246 2,612 7,907 7,240 7,024 6,047 5,051 3,233 5,772 44,886
Puerto Rico 0 0 0 10 2 14 11 5 7 49 78 0 1 15 23 46 32 21 23 161
Grand Total 397 577 2,379 1,978 1,645 1,167 501 282 292 8,821 8,324 2,612 7,908 7,255 7,047 6,093 5,083 3,254 5,795 45,047

1/ Data are reported as the International Roughness Index (IRI) in inches per mile. Reference: World Bank Technical pavement condition, additional measures of pavement distress are needed. Paper Number 46, 1986. Lower IRI represents smoother riding roadways; to obtain a comprehensive assessment of