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Railway Track Arc

Hi!
We’re actually working with my friends on multiplayer train simulator using UE. We are drawing a railway track using SplineMeshComponent, but we have problem to place a real curves based on arcs with accurate radius and length. In real world, railway curves are based only on arcs and transitions beetwen straigth fragments and arcs. Is it possible to do it in Unreal using blueprints?
Second question is how to translate Bezier points of curves - P0, P1, P2, P3 to Unreal? I’m asking cause we have external route editor which save data in above system.

Thank you for your help in advance.
Peter