Roads
Roads sometimes use a spiral to gain height in a confined space, cf. pigtail bridge.
Read more about this topic: Spiral (railway)
Famous quotes containing the word roads:
“Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could”
—Robert Frost (1874–1963)
“Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has made all the difference.”
—Robert Frost (1874–1963)