[Blender] Boulean modifier and Bezier Curve paths

1: I've got a problem with road modelling, I tried the same with Nurbs instead of Beziers. Changing the axis in the Curve modifier doesn't seem to help, it's never starting where it should. On one coordinate, it's got the right shape, however, it starts at the wrong point (it should start about where the grid ends in this image, not where it currently does) and is rotated by 90°.


2: The square spoke is only a placeholder, because there's no way to do it like that (I tried Boulean modifier, but it didn't work as I wanted, too, as it doesn't merge the objects, only cuts the one to fit the other, so I can't smooth it out) I'll do it as I always did, which looks worse then.