Parallel Splines

[_Aka_]

Hi,
I will answer first about having multiple lanes:

• Your solution (the offset) is good in mhy opinion as long as it gives you the desired result
  
• A solution similar to yours would have been to use the already existing Offset feature instead of coding yours
  
• Before explaining the next solution, you should make the distinction between the usage of the words Spline and Path in the context of Curvy: A spline is what contains the control points. Once the spline is rasterized to be used in a Curvy Generator, it becomes a path. This process happens in the Input Spline Path module
  So, based on this, my first to go solution would have been to use the Path Relative Translation module to translate paths, and use a Path Controller instead of a Spline Controller to move your objects