I am having a hard time understating how TBC is executing superelevation instructions in corridor modelling.
I have created a dummy corridor with multiple material layers. Typical XFall -3%, max superelevation 6%. All material layers 250mm deep, defined at +/- 5m offset with -3% slope. Typical section on the straight is a simple crown.
When all nodes are on top of each other, I am getting exactly the results I was expecting when superelevated. Please see screenshot below:
But when I move one of the nodes left or right, it all falls apart:
I have marked up in red the only difference between both templates.
Below is the video showing how drastically changes the execution of that template.
I know how to fix it (superelevate only Finished layer and define Material Layers as delta OS/delta elevation), I just want to know why its happening...