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. 2022 Aug 31;17(8):e0272993. doi: 10.1371/journal.pone.0272993

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© 2022 Salvi, Kumar

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — Over ~34,602 miles of road sections (~5.5% of overall road sections within CONUS) experience statistically significant trend (p < 0.05) in annual frequency of HREs. Out of these, 97% of road sections (~33,669 miles) experience moderate to high (0.25–0.75) rate of increase (inset plot). 63% (~21,292 miles) of road sections with statistically significant moderate to high trend reside within the southern United States. 714 miles of road sections (0.12% of roads experiencing HREs) exhibit a negative trend in HREs.