The bridge crosses the road at an angle and has these, I don't really know what you'd call them, parts that stick out so they're perpendicular to the road.
On each side there is what appears to be a tunnel alongside the roadway. At first I thought that these were for foot traffic to pass under the bridge. I was wrong. They are open on one end and on the other, as pictured here, only the upper part is open.
There were stairs to to the top and this is what I found there. The track appears to still be in use as looking the other way, the signal lights were on.
This is from just inside the other end of the tunnel depicted above. Here we can see mineral deposits hanging down from the ceiling. I don't know what sort of material it is.