This is distinct from the sorts of 3-lane roads (more common in Europe than the US) where the central lane is designated simultaneously for passing in either direction. (Which conversely seems really dangerous.)
Note also that rural road costs about $1M/lane-mile in the US (double in urban areas) so 900 miles of 3-lane road is probably at least $2B. If the road lasted a decade, it would make the cost-per-life-saved on the high side of US value of life guidelines.
https://en.wikipedia.org/wiki/2%2B1_road
This is distinct from the sorts of 3-lane roads (more common in Europe than the US) where the central lane is designated simultaneously for passing in either direction. (Which conversely seems really dangerous.)
Note also that rural road costs about $1M/lane-mile in the US (double in urban areas) so 900 miles of 3-lane road is probably at least $2B. If the road lasted a decade, it would make the cost-per-life-saved on the high side of US value of life guidelines.
https://en.wikipedia.org/wiki/Value_of_life#Life_Value_in_th...