This is a deck truss bridge modeled by CSMGJ on Blender. It's based on the Pony Truss bridge in Snosqualmie, WA. There was some effort in narrowing it and turning it upside down.
I noticed my last model said 3D print file. I've never done 3D printing. Seems this model would need to be printed in parts. If there is anything I can do to help in that regard, let me know.
The model is not textured. So you can add your own texture. Maybe some graphiti. Maybe a walk way with hand rail. Or chop it up and make it into something else. A good starting point.