Vertical alignment and sight distance
Why the open web links it
Explains vertical alignment and sight distance in road design with clear technical visuals.
Linked by 2 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including wikibooks.org, libretexts.org.
Cited in 2 Wikipedia articles, including Assured clear distance ahead, Death of Elaine Herzberg.