UTL is about exploring past, present and future urban technologies in science and fiction, etc...
https://rail-track.com/what-is-the-difference-between-rail-turnout-and-crossover/
https://www.railroadpart.com/rail-track-parts/railway-turnout.html
https://en.wikipedia.org/wiki/Level_junction#Examples
https://en.wikipedia.org/wiki/Flying_junction