Concrete Double Track Bridge 2 Supports N 1/160 piers/columns/legs/supports/Pylons/pile
Based on the Gunpowder and Bush River Amtrak catenary Bridges in Maryland. There are several modular parts to choose from to make the bridge the size you want.
See all modular bridge parts here:
https://www.shapeways.com/shops/bonevalley?section=N+Concrete+Double+Catenary&s=0
For more information, including measurements, go here:
https://bonevalleymodeler.blogspot.com/2023/08/modular-concrete-double-track-bridge.html