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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Table HM-63 - Highway Statistics 2018

Highway Statistics Series

Highway Statistics 2018


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Functional System Length - 2018 (1)
    Miles by Measured Pavement Roughness / Present Serviceability Rating

August 30, 2019

Table HM-63 (Sheet 1 of 3)
STATE RURAL MAJOR COLLECTOR
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 1,121 4,792 4,689 553 545 11,701 - - - - - - 11,701
Alaska 79 274 256 83 110 804 - - - - - - 804
Arizona 580 1,115 1,658 413 198 3,964 - - - - - - 3,964
Arkansas 258 2,019 4,716 1,778 966 9,738 - - 183 1,064 217 1,464 11,202
California 585 2,379 5,167 472 2,769 11,372 - - - - - - 11,372
Colorado 160 1,115 2,246 557 363 4,441 - - - - - - 4,441
Connecticut 2 149 447 117 142 857 - - - - - - 857
Delaware 64 132 165 19 9 390 - - - - - - 390
District of Columbia - - - - - - - - - - - - -
Florida 770 1,558 1,391 186 87 3,992 3 2 25 - - 31 4,023
Georgia 681 1,951 1,552 91 30 4,306 - - 7,256 - - 7,256 11,562
Hawaii - 9 93 52 59 213 - - - - - - 213
Idaho 168 334 169 19 1 692 559 418 1,688 695 281 3,641 4,333
Illinois 972 3,125 3,934 605 256 8,892 - - - - - - 8,892
Indiana 530 2,018 1,936 253 254 4,992 - - - - - - 4,992
Iowa - - - - - - - - - - - - -
Kansas 1,073 1,921 1,268 135 31 4,429 266 1,590 4,409 966 591 7,823 12,252
Kentucky 84 1,717 3,253 361 122 5,536 - - - - - - 5,536
Louisiana 157 1,527 1,767 553 666 4,671 - - - - - - 4,671
Maine 274 761 1,331 443 460 3,268 - - - - - - 3,268
Maryland - - - - - - - - - - - - -
Massachusetts 3 64 106 30 45 248 - - - - - - 248
Michigan 1,820 3,824 4,833 1,578 1,354 13,409 14 1 1 2 148 166 13,574
Minnesota 2,737 4,698 4,947 1,100 1,177 14,659 - - - - - - 14,659
Mississippi 191 1,871 5,867 2,131 1,669 11,729 - - - - - - 11,729
Missouri 117 2,792 8,678 3,288 1,359 16,234 - - - - - - 16,234
Montana 520 1,488 2,093 417 345 4,863 - - - - - - 4,863
Nebraska 638 563 711 356 159 2,428 21 9 4 - - 33 2,461
Nevada 227 536 1,077 213 84 2,138 - - - - - - 2,138
New Hampshire 89 216 453 119 164 1,041 - - - - - - 1,042
New Jersey - 21 388 30 - 439 42 104 190 - - 336 775
New Mexico 152 434 1,830 1,064 912 4,391 - - 71 - - 71 4,462
New York 426 2,179 2,110 417 261 5,393 - - - - - - 5,393
North Carolina 136 3,191 3,546 347 181 7,401 - - - - - - 7,401
North Dakota 1,261 2,925 2,376 267 107 6,935 - - - - - - 6,935
Ohio 3,428 4,129 2,848 406 223 11,034 - - - - - - 11,034
Oklahoma 635 1,173 3,596 1,612 2,870 9,885 - - - - - - 9,885
Oregon - 320 1,012 439 109 1,881 2,208 1,902 1,057 158 156 5,481 7,362
Pennsylvania 236 1,791 3,045 940 1,211 7,224 - - - - - - 7,224
Rhode Island - - 15 12 20 47 - - - - - - 47
South Carolina 667 3,075 4,263 1,214 799 10,017 - - - - - - 10,017
South Dakota 402 1,718 3,840 1,015 295 7,271 33 115 10 - - 158 7,429
Tennessee - - - - - - - - - - - - -
Texas - - - - - - - - - - - - -
Utah 251 722 1,429 383 229 3,015 - - - - - - 3,015
Vermont 75 530 784 183 272 1,843 - - - - - - 1,843
Virginia 24 781 2,145 399 257 3,606 - - - - - - 3,606
Washington 39 1,069 4,758 1,514 633 8,012 - - - - - - 8,012
West Virginia 8 749 2,574 1,070 1,091 5,492 - - - - - - 5,492
Wisconsin (5) - - - - 152 152 - - - - - - 152
Wyoming 584 965 872 226 74 2,720 - - - - - - 2,720
U.S. Total 22,229 68,718 106,232 27,462 23,120 247,760 3,147 4,142 14,894 2,884 1,393 26,460 274,221
Puerto Rico(4) - - - 16 44 60 - - - - - - 60
Grand Total 22,229 68,718 106,232 27,478 23,164 247,820 3,147 4,142 14,894 2,884 1,393 26,460 274,281

 

August 30, 2019

Table HM-63 (Sheet 2 of 3)
STATE URBAN MINOR ARTERIAL
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 193 688 951 227 244 2,302 - - - - - - 2,302
Alaska 19 58 67 21 17 182 - - - - - - 182
Arizona 73 391 1,405 468 205 2,543 - - - - - - 2,543
Arkansas 31 221 416 86 73 827 56 115 596 201 29 997 1,824
California 206 789 4,098 2,839 2,963 10,894 - - - - - - 10,894
Colorado 23 209 758 389 419 1,798 - - - - - - 1,799
Connecticut 25 242 795 317 294 1,672 - - - - - - 1,672
Delaware 15 61 82 27 33 217 - - - - - - 217
District of Columbia - - 5 19 133 157 - - - - - - 157
Florida 353 1,420 1,571 311 223 3,877 138 75 97 31 6 347 4,224
Georgia 494 773 491 65 65 1,888 - - 2,917 - - 2,917 4,805
Hawaii 6 27 66 33 58 191 - - - - - - 191
Idaho 4 19 35 2 2 62 168 141 141 91 20 561 623
Illinois 72 743 1,951 654 675 4,095 - - - - - - 4,095
Indiana 186 373 305 39 19 922 - - - - - - 922
Iowa - - - - - - - - - - - - -
Kansas 57 185 615 248 243 1,348 - - - - - - 1,348
Kentucky 69 345 568 122 84 1,189 - - - - - - 1,189
Louisiana 48 333 665 299 340 1,685 12 - 17 - 11 40 1,725
Maine 24 65 99 27 32 247 - - - - - - 247
Maryland - 1 12 1 2 16 - - - - - - 16
Massachusetts 9 155 774 328 267 1,533 - - - - - - 1,533
Michigan 156 764 1,896 859 950 4,625 51 11 21 19 88 190 4,815
Minnesota 476 845 703 260 264 2,548 - - - - - - 2,548
Mississippi 49 190 443 186 223 1,091 - - - - - - 1,091
Missouri 38 249 955 403 483 2,128 - - - - - - 2,128
Montana 11 64 109 43 64 291 - - - - - - 291
Nebraska 6 2 10 4 16 39 2 5 8 - - 15 53
Nevada 158 222 352 93 66 891 - - - - - - 891
New Hampshire 39 115 189 62 81 486 - 1 3 - - 5 491
New Jersey 109 137 683 580 706 2,216 492 170 617 122 12 1,414 3,630
New Mexico 11 76 307 158 178 730 - - - - 1 1 731
New York 74 826 2,092 944 768 4,704 - - - - - - 4,704
North Carolina 35 814 1,604 345 278 3,076 - - - - - - 3,076
North Dakota 7 40 120 55 68 291 - - - - - - 291
Ohio 196 1,064 1,469 551 690 3,971 - - - - - - 3,971
Oklahoma 30 177 608 254 451 1,520 - - - - - - 1,520
Oregon 16 64 65 31 5 182 453 287 336 20 10 1,107 1,289
Pennsylvania 112 650 1,837 770 673 4,042 - - - - - - 4,042
Rhode Island - 9 61 42 77 189 - - - - - - 189
South Carolina 57 299 963 249 156 1,724 - - - - - - 1,724
South Dakota 3 22 190 149 50 414 3 5 2 - - 11 425
Tennessee 16 57 35 7 11 126 - - - - - - 126
Texas 8 27 29 6 7 77 - - - - - - 77
Utah 14 96 304 113 135 661 - - - - - - 661
Vermont 6 53 58 15 12 144 - - - - - - 144
Virginia 10 254 714 198 91 1,266 - - - - - - 1,266
Washington 51 453 1,130 479 618 2,731 - - - - - - 2,731
West Virginia 5 152 338 110 113 718 - - - - - - 718
Wisconsin (5) - 5 20 7 22 55 - - - - - - 55
Wyoming 17 59 67 18 24 184 43 19 9 2 1 73 257
U.S. Total 3,618 14,883 33,084 13,513 13,669 78,767 1,420 830 4,765 484 179 7,679 86,445
Puerto Rico(4) - - 24 55 295 374 22 - 32 6 - 60 434
Grand Total 3,618 14,883 33,107 13,568 13,964 79,140 1,442 830 4,797 491 179 7,739 86,879

 

August 30, 2019

Table HM-63 (Sheet 3 of 3)
STATE URBAN MAJOR AND MINOR COLLECTOR
INTERNATIONAL ROUGHNESS INDEX (2) PRESENT SERVICEABILITY RATING (3) TOTAL REPORTED
<60 60-94 95-170 171-220 >220 TOTAL >3.9 3.5-3.9 2.6-3.4 2.1-2.5 <=2.0 TOTAL
Alabama 100 696 1,606 573 743 3,717 - - - - - - 3,717
Alaska 19 77 104 36 61 298 - - - - - - 298
Arizona 31 113 857 417 365 1,783 - - - - - - 1,783
Arkansas 2 29 153 69 38 290 91 220 978 568 106 1,963 2,254
California 25 473 3,620 2,724 6,065 12,907 - - - - - - 12,907
Colorado 55 180 757 427 468 1,887 2 - - - 2 4 1,891
Connecticut 1 108 906 462 655 2,132 - - - - - - 2,132
Delaware 11 98 202 74 87 472 - - - - - - 472
District of Columbia - - 3 18 135 156 - - - - - - 156
Florida 204 1,797 3,784 1,044 973 7,802 130 141 168 30 42 510 8,312
Georgia 85 160 71 14 3 332 - - 4,079 - - 4,079 4,411
Hawaii 2 11 131 111 190 446 - - - - - - 446
Idaho - 2 4 - - 7 181 99 260 76 33 649 656
Illinois 69 720 2,142 1,038 1,568 5,537 - - - - - - 5,537
Indiana 69 125 59 2 - 255 - - - - - - 255
Iowa - - - - - - - - - - - - -
Kansas 50 141 723 354 717 1,985 - 1 2 - 2 4 1,989
Kentucky 14 75 287 82 41 500 - - - - - - 500
Louisiana 53 300 799 309 528 1,990 33 - 37 - 50 121 2,110
Maine 23 110 245 90 110 578 - - - - - - 578
Maryland - - - - - - - - - - - - -
Massachusetts - 1 210 2 - 213 - - - - - - 213
Michigan 52 442 1,274 647 966 3,381 73 21 18 23 147 281 3,663
Minnesota 137 446 1,206 415 625 2,829 - - - - - - 2,829
Mississippi 1 97 560 318 613 1,589 - - - - - - 1,589
Missouri 3 129 955 574 911 2,572 - - - - - - 2,572
Montana 9 33 100 100 201 443 - - - - - - 443
Nebraska - - - - - - 1 6 4 3 - 14 15
Nevada 99 213 467 209 216 1,205 - - - - - - 1,205
New Hampshire 7 93 214 78 148 540 - - 1 - - 1 541
New Jersey - 50 364 526 962 1,903 246 147 751 243 34 1,421 3,324
New Mexico 40 154 441 199 317 1,152 - - - - - - 1,152
New York 17 326 1,419 881 1,083 3,724 - - - - - - 3,724
North Carolina 17 611 1,874 399 260 3,160 - - - - - - 3,160
North Dakota 2 15 82 61 148 308 - - - - - - 308
Ohio 179 1,086 2,498 866 1,348 5,978 - - - - - - 5,978
Oklahoma 20 115 368 176 402 1,080 - - - - - - 1,080
Oregon 2 30 40 8 9 88 973 742 655 139 28 2,537 2,625
Pennsylvania 25 309 2,329 1,300 1,832 5,794 - - - - - - 5,794
Rhode Island - 5 119 100 224 447 - - - - - - 447
South Carolina 11 380 1,209 529 636 2,765 - - - - - - 2,765
South Dakota - 3 118 119 85 326 1 1 - - - 1 327
Tennessee 6 20 13 - 2 41 - - - - - - 41
Texas - 18 40 15 39 112 - - - - - - 112
Utah 4 98 534 382 586 1,603 - - - - - - 1,603
Vermont 3 53 99 48 45 247 - - - - - - 247
Virginia 3 130 444 177 96 850 - - - - - - 850
Washington 12 199 1,107 583 1,017 2,918 - - - - - - 2,918
West Virginia - 80 324 203 324 931 - - - - - - 931
Wisconsin (5) - - 2 8 16 27 - - - - - - 27
Wyoming 18 77 102 38 32 266 178 64 107 6 6 362 628
U.S. Total 1,480 10,426 34,965 16,805 25,892 89,568 1,909 1,441 7,061 1,087 449 11,948 101,516
Puerto Rico(4) - - 13 47 299 358 10 - 6 9 - 24 382
Grand Total 1,480 10,426 34,978 16,852 26,191 89,926 1,919 1,441 7,066 1,096 449 11,972 101,898

(1) Some States elect to report International Roughness Index (IRI) for these systems; some report IRI for some sections and PSR for some sections. PSR is ignored for sections coded with both IRI and PSR. Some differences from other tables may be noted because these are estimated from sample data. Excludes unpaved mileage. Includes structures.

(2) Data are reported as the 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.

(3) The "Present Serviceability Rating" (PSR) is a subjective, primarily ride-based system adapted from the "AASHO ROAD TESTS" conducted in the late 1950's and early 1960's. Reference: Highway Special Report 61E, 1962. The PSR values range from 0.1 to 5.0; higher PSR values represent smoother riding roadways.

(4) Includes unpaved miles or bridges.

(5) Substantial amount of missing IRI data; caution is advised when used in analysis.

 

Page last modified on June 19, 2015
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