This is a dead end pole which once served the Rock Island, then Katy, now UP at Saginaw, TX. Well, it doesn't really do much for UP, but I think two wires worked from here to the next crossing, then the pole line is gone. It's just some interesting construction with the dead ends, drops, terminal boxes, and cable. It apparently went across the interlocking at one time, given the spools on the unwired side of the pole.