- Bridges per 100 miles of public road: 4.4
- Total bridges: 2,067
- Share of bridges in poor condition: 1.2%

- Bridges per 100 miles of public road: 4.8
- Total bridges: 4,285
- Share of bridges in poor condition: 10.6%

- Bridges per 100 miles of public road: 5.6
- Total bridges: 4,025
- Share of bridges in poor condition: 5.0%

- Bridges per 100 miles of public road: 6.2
- Total bridges: 3,056
- Share of bridges in poor condition: 2.4%

- Bridges per 100 miles of public road: 7.2
- Total bridges: 5,266
- Share of bridges in poor condition: 6.9%

- Bridges per 100 miles of public road: 7.2
- Total bridges: 5,886
- Share of bridges in poor condition: 16.7%

- Bridges per 100 miles of public road: 8.4
- Total bridges: 4,561
- Share of bridges in poor condition: 5.1%

- Bridges per 100 miles of public road: 9.2
- Total bridges: 1,632
- Share of bridges in poor condition: 8.1%

- Bridges per 100 miles of public road: 9.2
- Total bridges: 11,284
- Share of bridges in poor condition: 11.4%

- Bridges per 100 miles of public road: 9.4
- Total bridges: 13,496
- Share of bridges in poor condition: 4.3%

- Bridges per 100 miles of public road: 9.9
- Total bridges: 8,869
- Share of bridges in poor condition: 4.9%

- Bridges per 100 miles of public road: 10.3
- Total bridges: 12,680
- Share of bridges in poor condition: 3.5%

- Bridges per 100 miles of public road: 10.4
- Total bridges: 3,114
- Share of bridges in poor condition: 6.5%

- Bridges per 100 miles of public road: 10.4
- Total bridges: 8,235
- Share of bridges in poor condition: 4.8%

- Bridges per 100 miles of public road: 10.5
- Total bridges: 8,358
- Share of bridges in poor condition: 5.4%

- Bridges per 100 miles of public road: 10.9
- Total bridges: 2,485
- Share of bridges in poor condition: 14.8%

- Bridges per 100 miles of public road: 11.3
- Total bridges: 8,467
- Share of bridges in poor condition: 1.1%

- Bridges per 100 miles of public road: 11.9
- Total bridges: 9,395
- Share of bridges in poor condition: 5.6%

- Bridges per 100 miles of public road: 11.9
- Total bridges: 14,987
- Share of bridges in poor condition: 1.6%

- Bridges per 100 miles of public road: 12.4
- Total bridges: 14,307
- Share of bridges in poor condition: 6.5%

- Bridges per 100 miles of public road: 12.9
- Total bridges: 779
- Share of bridges in poor condition: 15.3%

- Bridges per 100 miles of public road: 13.0
- Total bridges: 12,941
- Share of bridges in poor condition: 5.4%

- Bridges per 100 miles of public road: 13.4
- Total bridges: 875
- Share of bridges in poor condition: 1.3%

- Bridges per 100 miles of public road: 14.2
- Total bridges: 5,245
- Share of bridges in poor condition: 8.5%

- Bridges per 100 miles of public road: 14.5
- Total bridges: 25,737
- Share of bridges in poor condition: 6.2%

- Bridges per 100 miles of public road: 15.3
- Total bridges: 17,555
- Share of bridges in poor condition: 9.0%

- Bridges per 100 miles of public road: 15.6
- Total bridges: 2,527
- Share of bridges in poor condition: 7.6%

- Bridges per 100 miles of public road: 16.1
- Total bridges: 15,348
- Share of bridges in poor condition: 7.9%

- Bridges per 100 miles of public road: 16.1
- Total bridges: 16,164
- Share of bridges in poor condition: 3.5%

- Bridges per 100 miles of public road: 16.2
- Total bridges: 246
- Share of bridges in poor condition: 1.6%

- Bridges per 100 miles of public road: 16.8
- Total bridges: 5,446
- Share of bridges in poor condition: 4.6%

- Bridges per 100 miles of public road: 17.1
- Total bridges: 55,175
- Share of bridges in poor condition: 1.3%

- Bridges per 100 miles of public road: 17.5
- Total bridges: 18,877
- Share of bridges in poor condition: 7.1%

- Bridges per 100 miles of public road: 17.5
- Total bridges: 6,798
- Share of bridges in poor condition: 6.5%

- Bridges per 100 miles of public road: 17.9
- Total bridges: 24,925
- Share of bridges in poor condition: 5.2%

- Bridges per 100 miles of public road: 18.0
- Total bridges: 14,410
- Share of bridges in poor condition: 7.0%

- Bridges per 100 miles of public road: 18.4
- Total bridges: 26,846
- Share of bridges in poor condition: 9.2%

- Bridges per 100 miles of public road: 18.5
- Total bridges: 13,997
- Share of bridges in poor condition: 3.5%

- Bridges per 100 miles of public road: 18.5
- Total bridges: 24,590
- Share of bridges in poor condition: 9.0%

- Bridges per 100 miles of public road: 18.8
- Total bridges: 7,314
- Share of bridges in poor condition: 19.7%

- Bridges per 100 miles of public road: 19.2
- Total bridges: 23,166
- Share of bridges in poor condition: 13.0%

- Bridges per 100 miles of public road: 19.4
- Total bridges: 12,782
- Share of bridges in poor condition: 12.1%

- Bridges per 100 miles of public road: 19.8
- Total bridges: 19,337
- Share of bridges in poor condition: 5.3%

- Bridges per 100 miles of public road: 19.9
- Total bridges: 2,836
- Share of bridges in poor condition: 2.6%

- Bridges per 100 miles of public road: 20.1
- Total bridges: 23,220
- Share of bridges in poor condition: 7.9%

- Bridges per 100 miles of public road: 20.4
- Total bridges: 4,361
- Share of bridges in poor condition: 5.0%

- Bridges per 100 miles of public road: 20.8
- Total bridges: 23,870
- Share of bridges in poor condition: 19.2%

- Bridges per 100 miles of public road: 21.1
- Total bridges: 20,331
- Share of bridges in poor condition: 4.4%

- Bridges per 100 miles of public road: 21.7
- Total bridges: 16,788
- Share of bridges in poor condition: 6.3%

- Bridges per 100 miles of public road: 22.1
- Total bridges: 27,151
- Share of bridges in poor condition: 4.6%

- Bridges per 100 miles of public road: 25.7
- Total bridges: 1,162
- Share of bridges in poor condition: 6.7%

Data reporting by Paxtyn Merten. Story editing by Jeff Inglis. Copy editing by Tim Bruns. Photo selection by Clarese Moller.