shmodot/scripts/Railway.cs

using Godot;
using System;

public class Railway : Node
{
    private Path _path = null;
    private Path Path
    {
        get
        {
            if (_path == null)
            {
                _path = GetNode<Path>("Path");
            }
            return _path;
        }
    }

    public Curve3D Curve => Path.Curve;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready()
    {
    }

    public override void _Process(float delta)
    {
    }

    public void AddPathFollower(PathFollow pathFollow)
    {
        Path.AddChild(pathFollow);
    }
}