This is a single bridge overpass element section.
I've created and included a few additional elements to show how this could be used. Feel free to use those or create your own.
Created with 3DS Max / Vray. OBJ provided. All with Maps and UVs. Maps created in Substance Painter.
MAX (Autodesk 3ds Max, filesize: 80.7 MB), OBJ (OBJ, filesize: 203 MB), FBX (Autodesk FBX, filesize: 72.4 MB)