U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000

Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedInInstagram

Policy and Governmental Affairs
Office of Highway Policy Information

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

Highway Statistics Series

Highway Statistics 2019


Printable Excel Version [82 KB]
Printable PDF Version [145 KB]

National Highway System Length - 2019

September 30, 2020

NATIONAL HIGHWAY SYSTEM LENGTH - 2019

MILES BY MEASURED PAVEMENT ROUGHNESS - RURAL

TABLE HM-47b SHEET 1 OF 2
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
INTERSTATE SYSTEM OTHER TOTAL
NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED
Alabama
0
517
45
8
571
0
1,744
194
42
1,981
0
2,262
239
50
2,551
Alaska
10
591
320
81
991
298
273
238
179
690
309
863
558
259
1,681
Arizona
6
762
128
20
910
28
754
356
65
1,175
34
1,516
484
85
2,085
Arkansas
-
369
60
10
439
0
1,206
637
95
1,938
0
1,575
697
105
2,377
California
1
927
249
37
1,213
26
2,545
952
143
3,640
27
3,472
1,201
180
4,854
Colorado
-
423
185
40
648
0
1,694
774
108
2,576
0
2,116
959
148
3,224
Connecticut
-
23
5
0
29
-
87
60
10
158
-
110
65
11
186
Delaware
-
-
-
-
-
1
104
32
2
137
1
104
32
2
137
District of Columbia
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Florida
0
698
16
3
717
2
2,372
361
29
2,762
2
3,070
377
33
3,479
Georgia
-
448
83
7
537
-
2,550
609
29
3,187
-
2,998
692
36
3,725
Hawaii
-
-
-
-
-
-
21
41
19
80
-
21
41
19
80
Idaho
0
469
45
4
519
205
1,173
302
31
1,506
205
1,642
347
35
2,025
Illinois
-
1,062
159
22
1,243
0
1,321
895
192
2,408
0
2,383
1,054
214
3,651
Indiana
1
589
163
32
784
1
1,204
500
43
1,747
1
1,793
662
76
2,531
Iowa
5
521
83
6
610
33
2,128
1,061
194
3,384
37
2,649
1,144
200
3,993
Kansas
1
557
77
5
640
0
2,676
313
41
3,030
1
3,233
391
46
3,670
Kentucky
0
636
67
8
711
1
1,287
329
27
1,643
1
1,923
396
36
2,354
Louisiana
10
318
184
18
520
13
564
417
98
1,080
22
882
601
117
1,599
Maine
-
222
50
7
279
2
530
181
87
798
2
751
232
94
1,078
Maryland
-
124
17
2
142
-
327
39
11
377
-
451
56
13
519
Massachusetts
-
53
8
2
63
0
249
136
36
420
0
302
144
37
483
Michigan
4
436
103
18
558
0
1,945
473
65
2,483
4
2,382
576
83
3,041
Minnesota
-
470
104
14
588
20
2,441
883
145
3,468
20
2,911
986
159
4,056
Mississippi
-
506
62
10
578
-
1,293
449
70
1,812
-
1,800
511
80
2,391
Missouri
-
784
52
5
842
-
2,480
465
44
2,989
-
3,264
517
49
3,831
Montana
-
968
115
11
1,094
-
1,960
704
110
2,774
-
2,928
819
122
3,868
Nebraska
-
354
53
8
415
51
1,970
547
116
2,632
51
2,325
599
123
3,047
Nevada
-
438
16
3
457
-
1,397
139
8
1,544
-
1,836
155
10
2,001
New Hampshire
-
135
7
0
142
-
293
72
22
387
-
428
79
22
529
New Jersey
-
40
5
0
45
-
119
53
23
195
-
159
57
23
240
New Mexico
-
717
110
17
843
-
1,295
392
62
1,749
-
2,012
502
78
2,593
New York
6
644
133
21
798
37
1,441
692
121
2,254
43
2,085
825
142
3,051
North Carolina
5
510
42
7
559
20
1,655
501
37
2,193
25
2,165
543
44
2,752
North Dakota
-
479
29
2
510
-
2,445
431
69
2,945
-
2,924
460
71
3,455
Ohio
-
546
85
12
643
1
1,460
392
42
1,893
1
2,005
478
53
2,536
Oklahoma
19
514
101
16
631
33
1,355
761
158
2,274
52
1,869
862
174
2,905
Oregon
-
439
53
3
495
0
1,980
607
57
2,644
0
2,419
660
60
3,139
Pennsylvania
-
881
160
26
1,066
-
1,319
478
87
1,884
-
2,199
638
113
2,951
Rhode Island
-
17
1
0
18
1
27
49
32
107
1
44
50
32
125
South Carolina
-
447
76
23
546
7
1,023
497
65
1,586
7
1,471
573
89
2,132
South Dakota
2
527
59
3
589
15
1,748
997
131
2,876
17
2,275
1,056
134
3,466
Tennessee
0
601
38
5
645
0
1,411
296
39
1,746
0
2,013
334
44
2,391
Texas
2
1,707
276
15
1,998
33
5,549
1,884
158
7,591
35
7,256
2,160
174
9,590
Utah
-
593
90
2
685
-
700
446
38
1,183
-
1,293
535
39
1,868
Vermont
1
236
18
1
255
1
237
57
12
306
2
473
75
13
561
Virginia
-
541
54
2
598
1
1,186
540
33
1,759
1
1,727
594
35
2,356
Washington
-
329
76
23
429
1
1,155
674
96
1,924
1
1,484
750
119
2,353
West Virginia
-
278
34
7
319
10
524
390
96
1,010
10
802
424
103
1,329
Wisconsin
-
397
105
12
513
3
1,795
1,144
215
3,155
3
2,191
1,249
227
3,668
Wyoming
-
712
87
8
807
-
1,492
432
39
1,963
-
2,204
520
46
2,770
U.S. Total
73
24,555
4,087
589
29,231
844
68,504
23,873
3,670
96,048
917
93,059
27,961
4,259
125,279
Puerto Rico
5
9
13
20
42
1
4
16
21
41
5
13
28
42
83
Grand Total
78
24,564
4,100
610
29,273
844
68,509
23,889
3,691
96,089
922
93,072
27,989
4,301
125,362

For footnotes, see Footnotes.

September 30, 2020

NATIONAL HIGHWAY SYSTEM LENGTH - 2019

MILES BY MEASURED PAVEMENT ROUGHNESS - URBAN

TABLE HM-47b SHEET 2 OF 2
STATE INTERNATIONAL ROUGHNESS INDEX (IRI) (1)
INTERSTATE SYSTEM OTHER TOTAL
NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED NOT REPORTED (2) < 95 95-170 > 170 TOTAL REPORTED
Alabama
1
340
65
27
432
26
955
236
93
1,284
27
1,295
301
120
1,717
Alaska
0
62
15
1
79
0
87
57
17
161
0
149
72
18
239
Arizona
4
209
34
5
249
46
366
313
116
794
50
575
347
121
1,043
Arkansas
-
213
79
19
310
1
288
279
111
678
1
501
357
130
988
California
4
698
441
100
1,238
275
1,553
2,759
3,385
7,696
280
2,251
3,199
3,484
8,934
Colorado
-
179
107
18
304
0
514
575
290
1,380
0
693
682
308
1,684
Connecticut
-
263
50
4
318
-
362
408
187
958
-
625
458
192
1,275
Delaware
2
20
15
4
38
2
136
90
28
254
4
155
105
31
292
District of Columbia
0
2
5
5
12
4
1
14
103
119
4
3
20
108
130
Florida
-
672
84
22
778
10
3,072
1,198
260
4,531
10
3,744
1,283
283
5,309
Georgia
-
579
112
19
710
-
1,888
752
165
2,806
-
2,467
864
184
3,516
Hawaii
-
13
29
13
55
1
78
132
109
319
1
91
162
121
374
Idaho
-
81
10
1
92
121
129
83
37
250
121
210
93
39
341
Illinois
3
692
187
60
939
13
939
1,402
804
3,144
16
1,631
1,588
863
4,083
Indiana
1
294
166
31
491
8
371
259
63
693
9
665
426
94
1,184
Iowa
11
134
35
7
175
19
305
404
203
912
30
439
438
210
1,087
Kansas
2
174
51
9
234
7
296
145
60
502
8
470
197
69
735
Kentucky
1
185
40
7
232
18
396
240
72
708
19
581
280
78
940
Louisiana
18
206
140
49
395
85
306
370
282
958
103
512
510
331
1,353
Maine
-
77
9
1
87
2
55
64
39
158
2
132
73
40
245
Maryland
0
256
58
23
338
7
639
362
308
1,308
7
895
420
331
1,646
Massachusetts
4
431
57
14
502
46
572
869
869
2,311
50
1,003
927
883
2,813
Michigan
3
438
180
55
673
26
817
1,095
797
2,709
29
1,255
1,275
852
3,382
Minnesota
0
221
86
19
325
8
522
245
74
841
8
743
331
93
1,167
Mississippi
-
202
43
9
253
-
464
358
191
1,013
-
666
400
200
1,266
Missouri
-
442
81
15
538
-
757
407
181
1,344
-
1,199
488
196
1,882
Montana
-
85
11
2
98
-
88
84
48
220
-
173
95
50
318
Nebraska
-
47
19
2
69
7
126
157
178
461
7
173
177
180
530
Nevada
-
118
42
3
163
-
232
142
45
419
-
350
184
48
582
New Hampshire
-
80
3
-
83
0
209
71
40
320
0
289
74
40
403
New Jersey
-
273
74
39
387
-
834
704
803
2,341
-
1,107
779
842
2,728
New Mexico
-
132
19
5
156
-
179
132
68
379
-
311
151
73
535
New York
13
575
259
86
920
124
1,055
1,506
1,358
3,920
136
1,631
1,765
1,444
4,840
North Carolina
9
638
127
14
778
25
1,055
827
233
2,115
34
1,692
954
247
2,893
North Dakota
-
53
7
0
61
1
83
80
42
205
1
136
88
42
266
Ohio
-
719
171
41
931
13
972
745
481
2,198
13
1,691
916
523
3,130
Oklahoma
15
183
72
17
272
19
299
255
96
650
34
482
327
113
922
Oregon
-
193
35
7
234
10
391
362
159
911
10
583
397
165
1,146
Pennsylvania
0
545
189
62
797
-
1,153
1,446
817
3,416
0
1,698
1,635
880
4,212
Rhode Island
-
43
8
1
52
16
66
142
185
392
16
109
150
186
444
South Carolina
-
246
47
11
304
7
458
537
160
1,155
7
704
584
171
1,459
South Dakota
0
61
25
2
88
9
44
68
34
146
9
105
93
36
234
Tennessee
0
479
68
10
557
5
1,294
549
224
2,066
5
1,772
617
233
2,622
Texas
3
955
451
50
1,456
156
2,713
2,606
1,522
6,841
158
3,668
3,058
1,571
8,296
Utah
-
191
58
4
253
-
404
235
55
695
-
596
294
59
948
Vermont
-
59
5
1
64
4
48
28
9
85
4
107
33
10
149
Virginia
1
393
113
14
521
3
695
799
285
1,779
4
1,088
912
299
2,300
Washington
-
251
72
12
335
11
632
727
501
1,861
11
883
799
513
2,195
West Virginia
0
188
36
11
235
27
179
143
64
387
28
367
179
75
622
Wisconsin
2
212
137
16
364
37
366
904
633
1,902
39
578
1,040
648
2,267
Wyoming
-
78
23
5
106
-
93
65
32
190
-
171
88
37
296
U.S. Total
97
13,879
4,250
950
19,080
1,199
29,535
26,434
16,914
72,884
1,296
43,415
30,684
17,864
91,963
Puerto Rico
19
52
110
77
238
6
16
134
284
434
24
68
244
360
672
Grand Total
116
13,931
4,359
1,027
19,318
1,204
29,551
26,569
17,198
73,317
1,320
43,482
30,928
18,225
92,635

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
  2. May include sections entirely on structures and unpaved miles.

Return to top

Page last modified on July 29, 2021
Privacy Policy | Freedom of Information Act (FOIA) | Accessibility | Web Policies & Notices | No Fear Act | Report Waste, Fraud and Abuse | U.S. DOT Home | USA.gov | WhiteHouse.gov

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000