From Auran's Content Creation Art Source:
The in-game crossing rebuilt into UMxing-A45R2t.
UM = U Make your own crossing with your favorite lights, signs, fences, etc.
A = For use with in-game Australian and similar roads.
45R = Road angle 45 degree to the right.
2t = 2 track.
Surveyor: Objectmode-NL-Trackside.