Modelling tracks or just playing with play-doh?

I’ve been experimenting with modelling boarderX track features in play-doh to help me understand how they should be built correctly, and seeing how we can put a bit of science into feature design rather than track-builders always having to make it up as they go along.

Roller – 1:7 ratio sine wave
Roller – 1:7 ratio sine wave
Roller – 1:7 ratio sine wave
Berm – width to height ratio 2:1
Berm – Not much science, just thinking about an Euler spiral for the track transition curve
Berm – Not much science, just thinking about an Euler spiral for the track transition curve
Berm – width to height ratio 2:1, starting to use Euler spiral to create transition between berm and track.
Berm – width to height ratio 2:1, starting to use Euler spiral to create transition between berm and track.