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FHWA Home / Policy & Governmental Affairs / Highway Policy Information / Table HM-47I - Highway Statistics 2019

Highway Statistics Series

Highway Statistics 2019


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Federal-aid Length - 2019

September 30, 2020

FEDERAL-AID LENGTH - 2019

MILES BY MEASURED PAVEMENT ROUGHNESS / PRESENT SERVICEABILITY RATING

TABLE HM-47i
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) / PRESENT SERVICEABILITY RATING (PSR)(1)
RURAL URBAN TOTAL
NOT REPORTED(2) IRI: <95
PSR: >3.4
IRI: 95-170
PSR: 2.6-3.4
IRI: >170
PSR: <2.6
TOTAL REPORTED NOT REPORTED(2) IRI: <95
PSR: >3.4
IRI: 95-170
PSR: 2.6-3.4
IRI: >170
PSR: <2.6
TOTAL REPORTED NOT REPORTED(2) IRI: <95
PSR: >3.4
IRI: 95-170
PSR: 2.6-3.4
IRI: >170
PSR: <2.6
TOTAL REPORTED
Alabama
0
11,953
5,269
1,441
18,662
23
3,244
2,789
1,523
7,556
24
15,197
8,058
2,963
26,218
Alaska
427
1,315
905
459
2,680
181
348
244
118
711
608
1,663
1,150
578
3,391
Arizona
277
3,628
2,837
874
7,339
1,326
1,398
4,251
2,320
7,968
1,603
5,026
7,088
3,194
15,307
Arkansas
43
5,053
6,098
5,662
16,813
14
1,531
2,538
1,050
5,118
57
6,584
8,635
6,712
21,931
California
98
8,515
7,427
4,351
20,293
422
3,364
6,918
9,869
20,151
520
11,878
14,345
14,220
40,444
Colorado
0
4,400
4,901
1,601
10,902
0
1,184
2,172
2,019
5,374
0
5,583
7,073
3,620
16,276
Connecticut
-
323
653
285
1,260
-
986
2,224
1,870
5,080
-
1,308
2,877
2,155
6,340
Delaware
2
368
206
29
604
5
369
387
224
980
8
737
593
253
1,583
District of Columbia
-
-
-
-
-
16
3
29
402
434
16
3
29
402
434
Florida
61
6,799
2,405
467
9,671
95
7,771
6,942
3,100
17,812
157
14,571
9,347
3,566
27,484
Georgia
1
11,986
6,481
813
19,279
6
5,962
5,081
1,455
12,498
7
17,948
11,562
2,267
31,777
Hawaii
0
128
248
178
554
1
138
384
494
1,015
1
266
631
672
1,570
Idaho
991
4,023
2,931
901
7,855
247
865
672
201
1,738
1,238
4,888
3,603
1,102
9,593
Illinois
43
9,038
6,825
1,439
17,303
308
3,215
5,610
4,785
13,609
351
12,253
12,435
6,224
30,912
Indiana
162
6,496
5,567
2,716
14,779
294
2,649
4,070
2,762
9,481
456
9,145
9,637
5,478
24,260
Iowa
17,026
2,649
1,144
200
3,993
2,945
435
430
204
1,068
19,971
3,084
1,574
404
5,061
Kansas
262
9,457
2,745
419
12,621
150
879
1,441
1,576
3,896
411
10,336
4,186
1,995
16,517
Kentucky
537
4,873
4,543
571
9,987
755
1,108
1,483
751
3,342
1,292
5,981
6,025
1,322
13,328
Louisiana
45
3,637
3,242
1,334
8,214
176
1,146
2,009
2,078
5,233
221
4,783
5,251
3,412
13,446
Maine
6
2,311
1,810
1,162
5,282
4
354
426
277
1,057
10
2,664
2,236
1,438
6,339
Maryland
-
1,555
801
178
2,534
19
1,570
2,027
2,026
5,624
19
3,126
2,828
2,204
8,158
Massachusetts
493
485
318
40
843
5,852
1,200
1,603
1,154
3,958
6,346
1,685
1,921
1,194
4,801
Michigan
18
11,831
6,857
2,857
21,545
46
2,791
4,585
4,488
11,863
64
14,622
11,441
7,345
33,408
Minnesota
599
12,788
8,725
3,317
24,830
222
2,411
2,414
1,671
6,496
821
15,199
11,139
4,988
31,326
Mississippi
-
5,716
7,801
4,326
17,843
1
1,014
1,420
1,517
3,951
1
6,730
9,222
5,842
21,794
Missouri
23
7,682
11,454
4,940
24,077
0
1,658
2,368
2,638
6,664
23
9,340
13,822
7,578
30,740
Montana
-
6,789
3,778
1,022
11,590
0
304
329
463
1,096
0
7,094
4,107
1,485
12,685
Nebraska
51
6,596
1,989
936
9,521
11
190
192
188
571
62
6,786
2,181
1,125
10,092
Nevada
-
2,966
1,507
355
4,828
10
871
1,068
735
2,674
10
3,837
2,575
1,090
7,502
New Hampshire
0
1,210
626
305
2,141
0
542
478
394
1,414
0
1,751
1,104
699
3,554
New Jersey
28
518
696
79
1,294
-
2,643
3,034
3,916
9,594
28
3,162
3,731
3,995
10,887
New Mexico
0
3,282
3,358
2,741
9,381
1
636
1,018
1,081
2,735
1
3,918
4,376
3,822
12,117
New York
45
6,471
4,063
992
11,526
252
3,344
6,220
6,303
15,867
297
9,815
10,283
7,295
27,393
North Carolina
250
6,012
5,780
1,049
12,841
346
3,118
4,959
2,068
10,145
596
9,130
10,739
3,117
22,986
North Dakota
0
9,461
3,206
449
13,115
1
195
288
381
865
1
9,656
3,494
830
13,980
Ohio
210
10,995
4,126
842
15,963
27
4,746
5,056
4,091
13,893
237
15,741
9,183
4,933
29,856
Oklahoma
10,913
6,974
6,021
778
13,773
4,024
683
567
227
1,477
14,937
7,657
6,588
1,004
15,249
Oregon
115
7,774
3,804
896
12,474
10
3,206
1,454
395
5,055
125
10,980
5,258
1,290
17,529
Pennsylvania
264
6,091
5,753
2,500
14,343
451
2,930
5,649
5,041
13,620
715
9,020
11,403
7,541
27,963
Rhode Island
4
69
156
140
366
32
149
477
720
1,346
36
218
633
860
1,712
South Carolina
13
6,603
6,354
2,172
15,128
333
1,518
2,657
1,614
5,789
346
8,121
9,010
3,786
20,917
South Dakota
52
6,348
5,836
1,585
13,769
9
141
400
446
987
60
6,489
6,236
2,031
14,755
Tennessee
62
2,039
331
43
2,413
71
1,809
622
228
2,659
133
3,849
952
271
5,072
Texas
816
24,359
24,720
6,203
55,282
644
7,976
12,243
13,239
33,459
1,461
32,336
36,963
19,443
88,741
Utah
-
2,895
2,533
817
6,245
7
843
1,131
1,247
3,221
7
3,738
3,664
2,064
9,466
Vermont
15
1,552
1,143
530
3,226
24
261
209
136
605
39
1,813
1,352
666
3,831
Virginia
3,420
4,481
4,575
859
9,916
2,480
1,525
2,478
1,265
5,268
5,900
6,005
7,053
2,125
15,183
Washington
1
3,475
6,443
2,500
12,418
203
1,579
3,111
2,970
7,660
204
5,054
9,555
5,470
20,079
West Virginia
10
2,156
3,539
2,453
8,148
33
608
844
769
2,222
43
2,764
4,384
3,222
10,370
Wisconsin
11,957
4,426
2,871
1,150
8,446
5,407
640
1,244
799
2,683
17,365
5,066
4,115
1,949
11,129
Wyoming
1
4,657
1,607
295
6,559
22
353
177
85
614
23
5,009
1,784
380
7,174
U.S. Total
49,340
275,207
207,010
72,250
554,466
27,511
88,403
120,420
99,370
308,194
76,851
363,610
327,431
171,620
862,660
Puerto Rico
9
15
52
149
216
32
69
337
1,343
1,748
41
83
388
1,492
1,964
Grand Total
49,349
275,221
207,062
72,399
554,682
27,544
88,472
120,757
100,712
309,942
76,892
363,693
327,819
173,111
864,624

For footnotes, see Footnotes.

  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. 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.
  2. May include sections entirely on structures.
Page last modified on July 29, 2021
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