Use RoutePlanner Spline in Blueprint

[LeonTimmer99]

Hi,
i'm working with CARLA 0.9.15 and have created a blueprint that generates a railtrack along a spline. Currently, I have to manually place and adjust the spline in UE4. Instead, I would like to automatically use the existing Route Planner splines from the map to generate the railtrack in my blueprint. How can I access these Route Planner spline components from within my custom blueprint?
Any ideas would be much appreciated.