odd bridge

[Sumpter250]

I tried to replay yesterday, but the Gauge kept timing out. I finally gave up and figured I'd come back today. I'm wondering if the bridge tried to "rack" from side to side, and they found that the angle braces on the outside of the structure were not strong enough to do the job. The way those vertical pieces are cross braced at the top suggests that they are structural.

The arches carry the weight of bridge deck, and bridge traffic, the "bracing" looks to provide lateral support for the arches, and suspend the bridge deck from the arch.
This bridge would make an interesting model, and addition to a layout.