Efficiently chopping up a build extrusion?

[blabz2007]

I'm creating a scene with a vehicle that remains stationary, and lane lines will move towards the vehicle as the vehicle's speed increases.

I'm trying to create moving lane lines using a generator for each lane line, then set the path spline for all of them to be the same and change their position based on the speed of the vehicle on every update message.

I'll have about 50~ generators in my scene, 1 for each lane line. I've configured the resolution and angle threshold optimization to be optimal for performance vs esthetic. 

Not unexpectedly, this is quite a performance intensive, is there a more efficient way to do this with CurvySplines?

Thanks!