Posted by flywire on Sep 01, 2024; 10:28am
URL: https://forum.librecad.org/To-draw-a-clothoid-tp5725308p5725312.html

Fairly sure these are also commonly called spiral curves.  iirc they progressively transition from a straight to a curve and back again.

Edit: https://en.wikipedia.org/wiki/Track_transition_curve