What possibility is there to place a signal bridge cleanly, where it belongs and at the right length? When I place one, the top doesn't line up with the metal post:
It’s a spline, so you have to extend it. (Look up a YouTube tutorial about splines in Unreal Editor). That said, when I’ve tried other signal bridge models, the first post is rotated 90 degrees to how it should be, so let me know if you figure that out.
I've now experimented a bit. It's actually quite simple once you figure it out. You can spawn the post and the signal bridge individually. Then you can place the post and the signal bridge on the track as you want. And then you can change the length: "Use the scale options". I changed it from 1 to 5. Now the signal bridge is long enough to extend over the track.